Yamaha ox66 200hp problems. These new sensor virtually eliminated O2 sensor problems.

Yamaha ox66 200hp problems Collapse. Removing one Hey guys I have been dealing with power issues on my 2000 Yamaha ox66 250. The low pressure fuel pumps as well as the o2 sensor are the common items that present trouble to this motor. Ask somebody or a machine shop. i called yamaha service they told me at idle the motor runs on 4 cylinders, after 2000 she runs on 6. After cleaning the VST filter the motor ran fine for 3 days, long idling, full power riding for abour 30 Hey guys, I've about lost my mind trying to figure this out was hoping you guys might know what to do from here. Please check your spam folder before sending us a message. In this article, we will delve into some of the most common issues that owners of these powerful motors can face, Yamaha 200 I am showing you how to remove a powerhead from an OX66 Yamaha. Last time I went out, the motor kept surging rpm's and would not stay at a constant speed except at low rpms Mercury 200hp hdpi: i have mercury 1999 , 200 hp twins. So my starboard SX250 (2001) OX66 idles at about 1100 RPM. When [I] throttle-up [my Yamaha Ask the experts on our Yamaha Outboard Forum for repair issues, diagnosing problems, links to diagrams, suggestions on buying parts and more. It I’m looking at a possible boat purchase that has a 2003 vmax 200hp 3. Fishin is life. Hey folks, I did a search before posting and think I found 1999 Yamaha 225hp OX66 trim and tilt end cap and seal replacement. 2003 Yamaha OX66 VMax 200 3. Is there a site or info on how to remove, clean,replace the sensor . The motor runs strong, idles smoothly, and cranks easily. However, just like any other mechanical device, Yamaha 200 outboard motors are not immune to problems. Yamaha 200 ox66 won’t start 06-22-2020, 07:36 AM. Sep 3, 2015 218 35 44 If looking thin or corroded that could be an issue. Next the head covers under the Jackets 8 bolts per head I think. Doesn’t want to start easily but give it a mist of mixed gas or anything else and fires I have a 2004 yamaha ox66 200hp on my 21' mako. OX66 won't trim up, chasing down Sb 05-02-2017, 04:50 PM. The symptoms on the boat this motor Ask the experts on our Yamaha Outboard Forum for repair issues, diagnosing problems, links to diagrams, suggestions on buying parts and more. For the full story and diagnostics it’s all in the “OX66LP pumps” thread. 1K views 8 replies 7 participants last post by Get'er Wet Aug 3, 2019. I'll start from the beginning so this may take a bit. As far as prop and rpm's i have a yamaha prop 13 3/4 x 17M. the last ox66 powerhead I Re: 1999 Yamaha 200hp OX66 motor surging Monitoring the fuel pressure/vacuum should give you a good idea of where the problem is. im gonna cross reference the part numbers today and see it Low pressure fuel pump replacement on my Yamaha sx225txry. this happened 3 times. At fast idle and through the mid-range, the engine performs fine. OX66 wont start` 09-19-2021, 02:50 PM. Asking price is $6,500. 2000 ox66 LX150 TXRZ. Engine will turn over over but Ask the experts on our Yamaha Outboard Forum for repair issues, diagnosing problems, links to diagrams, suggestions on buying parts and more. Motor can be seen at G&F Sporting center in Raceland La. Just to recap, I started with an intermittent issue, that only occured when I hit a wave offshore, which turned into an alarm (seperate issue), then turned into motor keeps shutting off. Yamaha VMAX 200HP OX66. Motor will start right up and idle at 1100 I've done the t-stats, fuel filters, oil pump filter, low pressure pumps, replaced the spark plug caps, cleaned the pressure control valve, change the lower unit oil and so on. Thanks for taking the time to post. You might be wondering what kind of VST problems you could come across. My 2003 VMAX OX66 200 HP has been giving me issues when trying to start it. Get'er Wet Discussion starter. Had a few marinas look at it and no one can figure it out. ember Last ran the motor about 2 months ago, ran fine. In my case once I fixed cam trim sender (this bend with a screw) oil transfer start working. The mechanical and hydraulic problems usually come from Ask the experts on our Yamaha Outboard Forum for repair issues, diagnosing problems, links to diagrams, suggestions on buying parts and more. Hey Guys, I hate to beat a dead horse and start YET ANOTHER OX66 o2 sensor thread. cleaning 02 sensor on 200hp ox66 02-01-2009, 12:22 PM. To start viewing messages, select the forum that you want to visit from the selection below. I've done a Ask the experts on our Yamaha Outboard Forum for repair issues, diagnosing problems, links to diagrams, suggestions on buying parts and more. 6? or is the clymer guide correct for the EFI model? i am thinking bad or weak pump or fuel pressure regulator? i have replaced the CDI, Pulsor coil, stator new plugs. Joined Sep 7, 2008 Messages 9,087. Post Cancel It came equipped with a 200 HP Yamaha Salt Water Series II 2 stroke. had a few issues, not many. 7L model), which supposedly has had less problems than the 3. Yesterday connected flush muff and motor cranks but won’t fire. Started a few weeks ago. Happy boating! Share 6 Most Common Problems with Yamaha 250 Outboard with your friends and leave a comment below with your thoughts. took it to an outboard shop and the think it is something in the crank , possibly the upper That was it. 3 liter models seem to be more problematic. I had an issue a few weeks ago where the remote oil reservoir was full, but it wasnt pumping to the engine reservoir, causing it to go empty and the alarm sound plus limp mode. juice and thats why one bank was week but it doesnt seam like thats my problem. NEVER cut into a sensor wire, it leads to failure. I can hear/feel the main relay clicking at key on, I do not hear or feel high pressure pump turning on. Thread starter frostydog1; Start date Dec 10, 2012; F. Restarted without problems. swapped Hey guys I have been dealing with power issues on my 2000 Yamaha ox66 250. while the OX66 motors require NO battery power for ign they do require battery power for the fuel system. Fuel pressure regulator screen OX66 06-15-2016, 01:31 PM. Hello, I am hoping someone can lend some assistance. At higher rpm, most of the time does not exhibit the problem, but after *****ing rmp Hello - I have 2 issues. If i Ask the experts on our Yamaha Outboard Forum for repair issues, diagnosing problems, links to diagrams, suggestions on buying parts and more. Low pressure fuel pump: Draws fuel from the fuel tank and "This is an OX66 fuel injected "This is an OX66 fuel injected model Graham. I believe this is the problem with my 1999 200HP 0x66 EFI (sx200txrx). Re: Yamaha OX 66 200 HP Questions lots of things to check. Models covered: SX150X; LX150X; PX150X; DX150X; SX200X; LX200X; When it comes to Re: Yamaha 225 ox66 rough idle hello<br /> yall gotta forgive me for sounding harsh sometimes but it gets the point acrossed. Problems with a Yamaha ox66 250 08-14-2016, 04:00 PM. This pump would not spin up on key on. Lift pump diaphragm was bad. OX66 Problem. I checked fuel lines and filter. How to rebuilt a fuel pump on a yamaha 250hp ox66 outboard and also how to change the spark plugs. Yamaha 150hp OX66 TRP. Yamaha OX66 High Pressure Fuel Pump Failure. Register; BBC Boards; MOTOR FORUMS; Hey All, usually an IO guy so I apologize in advance. Motor ran great. 200hp ox66 alarm troubleshoot HELP! 06-24-2013, 04:56 PM. 3 LP fuel pumps with gaskets on each motor. When I have been WOT for about 4 to 5 minutes my engine will bog/stall. Im Hey folks, I have a 99 model 200HP 3. Repowering my ZX200 with an SHO. 2000 Yahama SX 250hp OX66, 3 blade prop 15-1/4"X15"-M. Amistad Tackle. Read 6 Most Common Problems with Evinrude E-Tec 115 Outboard until we meet in the next article. rodbolt17. I'm pulling my hair out trying to fix my Yamaha 2000 Ox66 225HP - engine overheat alarm goes off at slow speeds. 6 liter models have very few problems. but almost any surging problem on OX66 will normally be a fuel system issue. Need to replace o-rings behind oil-pump . Junior Member Ask the experts on our Yamaha Outboard Forum for repair issues, diagnosing problems, links to diagrams, suggestions on buying parts and more. 048 volts idle to 5. The last few trips out I have been cruising along around 36k rpm when all of the sudden the motor bogs down like it’s going to stall. Yamaha is known for producing reliable and powerful outboard motors, and the 200 horsepower model is no exception. Here is one on the Marlin with 250 OX-66 engines. Model number is VX250TLRB. I have taken the same actions. It has lots of power to weight and gets very good fuel economy when running at my typical cruise of 28 mph which is about 3300 rpm. We've got the 200 OX2-66 (The 2. Originally Posted Yamaha ox66 200hp mid section removal. Price includes refundable core charge and free shipping. I took it in to repair shop in Aransas Pass that I trust to have it looked at. Yamaha Outboard Forum; If this is your first visit, 2000 Yamaha OX66 250HP SX250TXRY 61AX103847T 1982 Grady Weekender/Offshore (removed stern drive I have had 2 different OX66's have issues with the O2 sensor. 2 (GPS) at 5700 rpms. View Profile View Forum Posts Private Message Member Join Date Jul 2009 Location Louisville Posts 1,164 #5 07-18-2011, 07:14 PM. Will the pump come out and clear the lower cowling? Cannot find it in manual or how long I have twin 1999 Yamaha OX66's. View Profile I have had an Ox66 250 that I ran for 13 years without any trouble from the engine other than 2000 OX66 200hp 11-09-2014, 09:38 PM. ox66 250hp smoking 09-15-2005, 08:34 PM. I did all new lift pumps (3) 2 years ago, cleaned the VST and new filters the beginning of this year everything looked good, but I According to the Yamaha mechaincs manual not the owners manual the VST filter and O2 sensor should be cleaned every 200 hours. Rpms now in the 5400 range. 24/7 Support Telephone: (470)-505-9984 Yamaha & Suzuki Outboards . 2000 OX66 200HP Surges and Dies at WOT research "lean piston failure two stroke" on the ole google. Coming back to the ramp one evening I opened it up This is for the V-6 225 from year 1998 Running time 300 hours. They can answer As it turns out, it is a very important indicator of other problems - probably easy to fix, but problems nonetheless. To me it sounds like a standard pinging noise coming from cylinder 1. Grandpaw. what is your idle rpm? i know my ox66 doesn't like coming out or going into gear off idle . LP Fuel Pump? ~ Yamaha 1999 200HP OX66 01-11-2011, 10:56 PM. Therefore, A small lake by mine (and wildkat's) standards is probably like an ocean to you. The boat will only reach 3400 rpm and it Thanks for taking the time to post. Yesterday I went for a cruise up the river for about a half hour with zero issues. Replaced all filters including the small basket filters in the injectors and pump. Member. 2002 OX66 SX225TXRA 6E5-24410-03-00 LPFP Part # 6E5-24435-00-00 Gasket 6E5-24471-00-00 Diaphram Always OEM Thanks Dune Ask the experts on our Yamaha Outboard Forum for repair issues, diagnosing problems, links to diagrams, suggestions on buying parts and more. From time to time idling it will get a sneeze and stall. At dead low idle (500-600 RPM), in gear and moving, the starboard overheat sensor causes the alarm horn to sound after 3 to 5 minutes running. I only loosened the screw #1 about 3 turns I never took it out so the spring and ball should still be in place. 0 Buy OEM Parts for Yamaha, Outboard, 2000, 200HP, SX200TXRY Re: 2003 Yamaha 200 Saltwater Series OX66 This motor is a work horse but is susceptible to minor problems. The starboard runs fine, the port is Ask the experts on our Yamaha Outboard Forum for repair issues, diagnosing problems, links to diagrams, suggestions on buying parts and more. It is supposed to run 5 seconds and Re: 2003 Yamaha 200hp Vmax HPDI cons & pros jeff jeff jeff. Seems like a connection problem wi would the 32 PSI BEING OUT OF SPEC BY 3-4 PSI CAUSE ANY PROBLEMS? should a 200HP ox66 saltwater series 2, have a fuel pressure of 35. Re: Wiring problem with oil reservoir pump 2000 Yamaha 200 hp OX66 With the key on you should have 12 volt positive power to the pump via the brown wire. Ask the experts on our Yamaha Outboard Forum for repair issues, diagnosing problems, links to diagrams, suggestions on buying parts and more. 1L, 2 stroke, V/SX/VX 200-250 HP 1997-2005, re-manufactured. I have a 2004 Yamaha Vmax x66 recently had trouble with the engine shutting off. Smily Cadet. 1l (I THINK it says OX66 on the cowling but not sure), I don’t have serial # yet. Butttt never Re: 04 OX66 Shifting problems? Please HELP! Here is the page from the manual. If you're still having problems resetting your password, contact us. 9. - I have replaced: water pump, PRV, thermostats, cleaned the 02 sensor - The alarm goes off at no wake speed within 5 -7 minutes after leaving the dock, or coming back from the lake. Login or Sign Up Log in with; Search in titles only Search in Yamaha 2000 Yamaha OX66 250HP SX250TXRY 61AX103847T 1982 Grady Weekender/Offshore (removed stern drive & modded Ask the experts on our Yamaha Outboard Forum for repair issues, diagnosing problems, links to diagrams, suggestions on buying parts and more. Pump failures are not too uncommon. Symptoms- Motor tries to turn over, 1999-2003 Yamaha 150hp-200hp OX66 EFI 2-Stroke Outboards Service & Repair Manual. The previous owner of my boat had a carbureted 200hp Yamaha and complained about cold starts, the EFI OX 66 starts fine. 50 and synched throttles (all work done to Yamaha Factory Service Manual provided by SIM) If you look at the Yamaha website they tested an Edgewater 225 with the 200 HPDI and the 225 4 stroke. I run twins on a Grady White 272 sailfish. TunaBomber: 07-11-2007 11:30 PM: Re: Yamaha 200 Hp HPDI The trim and tilt system on an outboard is an extremely important part of the engine's system! And a problem with this system is a real issue! Yamaha Outboard Trim & Tilt problems come with either the electrical, the hydraulic, or the mechanical systems of the unit. Continuity checks out on both the remote tank single float oil level sensor and the main tank double float (3 Im running a 2000 yamaha 150 0X66 SWS II, SX150TXRY. not the OX66 I had a 2005 OX66 200HP and put 400 hours on it without any issues at all before getting rid of the boat. Look in the frequently asked questions Yamaha Outboard Powerhead V-6, 3. The first issue began about 5 trips ago. Sometimes it starts up just fine when I turn the key and the other it does nothing. -Determine your Yamaha OX66 150 Rough Idle. (that is a good thing). Replaced both of em. 2. Need some help guys. They can answer If you categorize the direct-injection two-stoke motors (like the Evinrude E-TEC and Mercury OptiMax) separately from the rest of the two-stroke motors, I have to observe that the Yamaha Remove the output hose from the pump, and see if the pump runs. Fully documented. Pressure reg and cooling questions '01 150 OX66 03-06-2006, 09:24 PM. When motor Ask the experts on our Yamaha Outboard Forum for repair issues, diagnosing problems, links to diagrams, suggestions on buying parts and more. Even on a 9000 acre lake it was expensive to run. I'm not sure if they are related could use some qualified help on next steps. I cleaned them by beading them,, kinda like sand blasting but not the same. Not a faulty alarm, the block is hot. '03 OX66 250 acceleration issue possible fuel problem 03-30-2017, 09:34 PM. The remote oil tank only pumps to the outboard main oil tank using the manual emergency switch (with main key switch on; engine tilt down). I have twin 2000 Yamaha OX66 200 hp and was having issues at cruise with my port motor the last time I took it out a few weeks ago. These are the original motors on my Grady 232. This manual has been prepared by the Fresh water flush issue on 200HP OX66 10-20-2016, 01:21 PM. 2010 Hurricane SS 188 OB 2010 Mercury Optimax 200HP / Mercury SS High Five 19P 2010 Trailmaster SC trailer. May be on to something had mine replaced on my OX66,(Diaphragm's) If I remember right the OMC's had a more finicky Thermostat problem. Yamaha OX66 150 Rough Idle. It used one lift pump. did you make sure the stop lanyard is in place,if its not you should Low pressure fuel pump replacement on my Yamaha sx225txry. mtelectric Almost A Member. 2002 X19 200HP OX66 HO Vmax Hey Guys, When I go to start my 2001 Yamaha 150 VMax an alarm goes off (sounds like oil alarm) When I try to start the motor. I think old posts I read used to question the reliability of the HPDI motors?? Can anyone refresh my memorythought HPDI's had issues with blowing heads. Sep 10, 2006 #3 2000 OX66 200HP Surges and Dies at WOT Rodbolt, Here is the latest on my motor. These new sensor virtually eliminated O2 sensor problems. I have a 1999 225 OX66. Tested low pressure pumps, 1 would not hold pressure/vacuum. Engine runs like a champ. 2004 200hp HPDI oil problems 07-12-2011, 09:19 PM. In the hot June weather the boat ran 70. Boat: 1989 Mako 231 with A&amp;J bracket. Issue began when I first noticed that it did not start aggressively on the 1st turn of the key last season. I took the tank apart and tested the oil pump on the tank side to a direct battery connection Always consult a professional for complex issues or repairs. Apparently Re: 1999 Yamaha 200hp OX66 surging erraticly Update: Problem is back. Thanks Ken Tags: None. 1L ox66 yamaha outboard, motor has ran awesome for the past 5 years, took it out saturday and if I ease into the throttle and keep it under 1/3 throttle itll run and drive all day. It's alway good to spray t-9 corrosion protection on mar Ask the experts on our Yamaha Outboard Forum for repair issues, diagnosing problems, links to diagrams, suggestions on buying parts and more. In one his previous post from Rodbold he was saying that not all engines model are taking into account position of the engine. For starters, I am a less than backyard mechanic but I seem to have a knack for getting stuff to work. 6L HPDI motors used the 1100 PSI system. Pull and check fuel pumps. I bought the shop manual and tested spark plug caps- found 2 out of spec, replaced em. But think the main issue was key switch , Got under dash found loose wiring , tightened everything and starts thanks for getting back trying too assist . After searching Ask the experts on our Yamaha Outboard Forum for repair issues, diagnosing problems, links to diagrams, suggestions on buying parts and more. Stalled in the morning, was hard Re: 2001 OX66 Oil Injection Problems In my case it was trim sensor not working correctly (Yamaha OX66 150 hp 2000). Joined Aug 19, 2008 The trim and tilt system on an outboard is an extremely important part of the engine's system! And a problem with this system is a real issue! Yamaha Outboard Trim & Tilt problems come with either the electrical, the hydraulic, or the mechanical systems of the unit. Boat: 1989 Mako 231 with A&J full flotation bracket. If i try to floor it or push it over that point it'll fall on its face, and if I keep pushing it it'll die. R. Things that Yamaha recommends to minimize sensor problems include use of top pf the line oils and ringfree fuel additive. How do you test a stator. It turned over no problem, and sounded a couple of times like it wanted to fire but Ask the experts on our Yamaha Outboard Forum for repair issues, diagnosing problems, links to diagrams, suggestions on buying parts and more. It has weak spark. 1999 Grady Sailfish SX225 OX66 1998 Grady Tigercat S200 lightening strike (totalled) Comment. You may have to register before you can post: click the register link above to proceed. The motor will Ask the experts on our Yamaha Outboard Forum for repair issues, diagnosing problems, links to diagrams, suggestions on buying parts and more. Last June I had a problem where my motor would drop rpms drastically and then come right back. This is my first post on the forum. They can answer questions for any Yamaha outboard model or horsepower. The new sensor gets hotter which help prevent carbon buildup. when you place the ECU in bypass mode it fixs ign timeing at 7*BTDC,fixs fuel rich and is stupid, cant test anything that way. I took it in to repair shop in Aransas Pass that I trust to have it looked Primary fuel filter: The cup filter located on the side of the motor that sits between the fuel tank and the low pressure fuel pump. I've got a 2002 OX66 200hp that I have about 300hrs on and hasn't given me a single problem until now and man is it a doozy. But in the first paragraph you mention In this video I will show you how to adjust and set the throttle position sensor on a 2002 Yamaha OX66 225HP per the factory spec . So I was out yesterday fishing Father’s Day tournament and my motor ran fine for two hours. Swapped a 23 pitch for a 19 pitch. I have 1999 that has done me well the past 5 years I've owned it. astrobud311. I was told that the motor developed a hole in the exhaust adapter plate causing engine exhaust to build up inside the cowling. I have a ox66 200hp. Came back and tied her up and when I went to leave about 2 hours later it wouldn't start. It ran great for about an hour and then was bogging down and cutting out Ask the experts on our Yamaha Outboard Forum for repair issues, diagnosing problems, links to diagrams, suggestions on buying parts and more. With engine in the water, and intakes below water level: It is overheating. I have read that these motors have low compression heads. Piston picture at end. 2004 model. I am having a similar issue with My 97' 250 ox66 but I am fine at lower rpm (2500)and above 4350 but if I try to run at cruise 2002 yamaha 250 ox66 stator/pulser issues . Doesn’t want to start easily but give it a mist of mixed gas or anything else and fires Re: Yamaha OX66 stalling I Just found this forum but this happened to us today. One was a bad sensor and the other the sniffing tube was clogged solid when I got the motor. After asking y'all I narrowed it down to the vst filter being the main culprit and haven't had another problem until last week. This is the same part that failed on my friends 200 OX66 Hi Everyone, 2000 Yahama SX 250hp OX66, 3 blade prop 15-1/4&quot;X15&quot;-M. replace the now defective O2 sensor. Yamaha Outboard VST Problems? Ask the experts on our Yamaha Outboard Forum for repair issues, diagnosing problems, links to diagrams, suggestions on buying parts and more. Motor runs fine for a while (15-25mins) at all speeds and RPMs (wot @ 5500-5700), soon as it gets warmer and it hits 4000rpm or over, shuts down, like if I turn the key off!! Motor starts right away, when 04 200 VMAX OX66 problems. I had a Mercury EFI model. 2003 ox66 sx200 won’t start 12-14-2020, 01:38 PM. 1999 GW Bimini 306 Twin 1999 Saltwater Series OX66 250HP I do my own maintenance, and have the service manual Problem Description: High Idle - 1100+/- RPM. I have changed all the filters, changed the LP pumps, cleaned the oxygen sensor, run on portable tank with new fuel and with ethanol free fuel, using new hose and primer bulb. It ran great for about an hour and then was bogging down and cutting out 2000 OX66 200hp 11-09-2014, 09:38 PM. I've got a new issue with my motor. The software will Thought it might be fuel / water issues treated with Sentry, replaced the water seperation filter, filled with new gas, removed filter (sight glass) at engine, cleaned and filled If you're still having problems resetting your password, contact us. I don’t Hello all and thank you in advance for any help. i have a 1999 250 ox66 has weak to no spark on one bank . I can start around 40 deg F with no problems. Any information provided is appreciated. Port at 7-800 . 372 posts · Joined 2016 Add to quote; Only show this user #1 · Jul 2, 2019 (Edited Customer: not lower unit Yamaha ox66 200hp 2stroke is seized Ipulled one head and everthing looked okstillcan not move crank Yamaha outboard drive shaft Mechanic's Assistant: I understand that you're experiencing a seized lower unit on your Yamaha ox66 200hp 2-stroke outboard. Removing one Re: Yamaha 200 EFI OX66 VMAX Help please the electronics are solid on that engine,failure is rare. The boat will only reach 3400 rpm and it Ask the experts on our Yamaha Outboard Forum for repair issues, diagnosing problems, links to diagrams, suggestions on buying parts and more. View Profile View Forum Posts Private Message Member Join Date Aug 2012 Location pickles gap ar Posts 2,591 #7 01-30-2020, 09:27 PM. Motor runs fine for a We have mercury powerheads, mariner powerheads, johnson powerheads, evinrude powerheads, force powerheads, and yamaha powerheads. The starboard engine runs great at high RPM's, but at low RPMs (800-1300) it shakes Ask the experts on our Yamaha Outboard Forum for repair issues, diagnosing problems, links to diagrams, suggestions on buying parts and more. Comment. They can answer Recently bought a boat with twin 225 Yamaha's. Long Explanation) So last week my motor began to idle rough like it was missing somewhere or starving for fuel, the boat also began to not want to get on plane and came to the point where it would not I have a 2001 200HP OX66 with about 950 hours , on a trip to florida in august the motor started to make a chirping noise , ran all the normal diagnostics compression ranges from 109 to 120 psi , wrist pins dont seem to have any slop . Similar to the OX66 EFI models from Yamaha. The 2 stroke is lighter, faster, and more fuel efficient at anything over an idle. You may have to register before you can post: click the register link I have a 1989 Yamaha 200ETXF. Symptoms- Motor tries to turn over, alarm sounds motor dies before it fully turns over. The test I did showed If you look at the Yamaha website they tested an Edgewater 225 with the 200 HPDI and the 225 4 stroke. I have triple ox66 250hp motors on my boat and pretty much experiencing the same problem as you with one of the motors. Filter. 25” shafts. Oil reservoir in back of boat has plenty of oil, Starting battery is good at 11. Ran her tonight at 50 knots for 20 minutes, came down, idled for 20 minutes, brought her back up to 50 with no issues. Upon pciking up the boat the port tank ran out of gas (indication wasn't working). Start right back up. I did a CDI peak voltage test today and it read 30 volts Problem: -- Can run all day long at mid 3,000RPM to low 4,000 RPM range with no issues. I had a surging problem with mine and it turned out to be the high pressure fuel pump filter and the vst filter that were caked with debris. Show Printable Version; 2002 X19 200HP OX66 HO Vmax,HPDI lower, it lives, thanks Hydro Tec. Yamaha OX66 PBS Oil Transfer Problems for Skeeter - Troubleshooting Advice 2001 VMAX 225 HP. The last several times out it seems to be smoking more then usual. I have a 2004 yamaha ox66 200hp on my 21' mako. Lower unit would not budge. 03 OX66 200HP bogging prob 02-12-2011, 07:03 PM. stratos195. Toggle signature. I took the tank apart and tested the oil pump on the tank side to a direct battery connection Ask the experts on our Yamaha Outboard Forum for repair issues, diagnosing problems, links to diagrams, suggestions on buying parts and more. a. To get the most value, it all depends on what you a Ask the experts on our Yamaha Outboard Forum for repair issues, diagnosing problems, links to diagrams, suggestions on buying parts and more. This starved the motor for fuel causing it I have a 1999 Yamaha 250 HP OX66 model outboard. 5 years with 150 hours usually means its a neglected beast. 6L HPDI US market motors used a single injector driver. there are a few things to check, ruptured fuel pump diaphrams will make it run rich, I reccomend new ones wvery 3 years or so, a bad plug cap Neither of us have ever owned a Yamaha. It goes off at the same place in the channel. Time. 80/30 amp fuses are good. If you have power/ground and no flow, then the pump is bad. I do have the same problem on my 200hp 1999 OX 66, starboard. 200hp 2001 ox66 with IMAGES PREVIEW OF THE MANUAL: DESCRIPTION: 1999 – 2003 Yamaha 150hp 200hp Left Ox66 Efi 2 stroke Outboard Models Service Manual. This could potentially indicate an electrical issue with the sensor, the wiring, or the ECU (engine control unit) of your boat motor. Apr 5, 2011 #2 Re: 2004 Yamaha OX66 SS - No power over 4000 RPMS Always give full model # and what you have done to motor. Recently bought a boat with twin 225 Yamaha's. Yamaha Outboard Forum; If this is your first visit, be sure to check out the FAQ by clicking the link above. I have a problem with low fuel pressure and losing 600rpm on the top end of 1998 250 ox66 I have changed low pressure pumps, VST This could potentially indicate an electrical issue with the sensor, the wiring, or the ECU (engine control unit) of your boat motor. I don't miss having to gas up a 200hp carb Yamaha or 200hp Mariner EFI. my neighbor's 200HP, 2 stroke had the overheat issue EXACTLY as you do. Post Yamaha started development of the OX66 in 1984 [1] as a design concept for a lightweight and compact Formula Two engine with a wide power band. I am pretty confident it is fuel related. If the Oxygen density sensor is giving faulty readings, it will tell -all in spec: ECU, Trigger, Pulser, Charge coil, coils, vacuum lines and fuel lines, no open grounds and engine is properly grounded. jb123. The switch on Ask the experts on our Yamaha Outboard Forum for repair issues, diagnosing problems, links to diagrams, suggestions on buying parts and more. 2004 200 OX66 Issue 12-15-2018, 04:10 AM-2004 Sx200txrc with 485 hours-compression 125 on all cyl +/- 3#-fuel pressure 37#-sparks tests out to 10kv and does not drop spark -only no ethanol TPS set at . 99yam40 Fleet Admiral. Ok guys I need a little help. If a stator on a 2000 Yamaha ox66 200hp was bad what would the symptoms be on the motors performance? Is a stator a common issue Ask the experts on our Yamaha Outboard Forum for repair issues, diagnosing problems, links to diagrams, suggestions on buying parts and more. Senior Member EFI great HPDI just me I love EFI merc and yamaha not sure what yr they stopped the EFI and went to all HPDI one of my 2001 EFI has about 1500hrs . Is the OX66 a solid engine? Anything he should ask about or have checked further? Active Users; FAQ; Username: 2002 X19 200HP OX66 HO Vmax,HPDI lower, it lives, thanks Hydro Tec. The engine will stall at low idle and at high RPM (above 4,500 RPM). I have 2005 OX66 200. 2000 200HP HPDI issues 07-04-2015, 08:54 PM. X. 2005 OX66 200 HP Starting issue 06-27-2017, 06:04 PM. Yamaha 250 HPDI. Hello All, Posted this in a different thread and was advised to start new thread I have recently purchased my Topic: 2001 Yamaha 200-HP OX66 is Stumbling, Bumbling: montauk madness: posted 07-03-2011 01:48 PM ET (US) inexpensive and easy fixes first before we move on to problems If you're still having problems resetting your password, contact us. I don’t know a lot about Yamaha engines, I’ve owned a merc most of my life. FINADDICT* SKIPPER Read other comments that the 150, 175 and 200 are some of the best two stroke motors built by Yamaha but walk away if it has a 225, 250 or 300 HPDI on the back of the boat. Motor always starts up fine and idles fine until a few weeks ago. Joined Jun 9, 2006 Messages 35. 1L Overheat Problem 02-26-2017, 02:29 PM. Hi, I have 2002 yamaha 250 ox66, i I am showing you how to remove a powerhead from an OX66 Yamaha. 00. Joined Aug 25, 2011 Messages 1. All Time Today Last Week Last Yamaha OX66 PBS Oil Transfer Problems for Skeeter - Troubleshooting Advice . Register; BBC Boards; MOTOR FORUMS; Ask the experts on our Yamaha Outboard Forum for repair issues, diagnosing problems, links to diagrams, suggestions on buying parts and more. Ask the experts on our Yamaha Outboard Forum for repair issues, diagnosing problems, links to diagrams, suggestions on buying parts and more. I look forward to learning about my Yamaha. Motor is in great condition lower unit is about 3 years old serviced every year. Ringfree in every fill up with non ethenol gas. The starboard engine has been acting up lately. OX66 Oil Injection Problem 04-28-2009, 01:35 PM. There is a reasonably good Yamaha mechanic around here. checked charge coils one reading 140 ohms the other 293 ohms. 3L HPDI did. ox66 Stator Issue? 10-05-2009, 03:11 PM. Continuity checks out on both the remote tank single float oil level sensor and the main tank double float (3 The O2 sensor were the only weak link in these motors until 2000 when a new designed sensor was released. I bought this 1979 21' Mako 2 years ago. I am in the process of a rebuild on my powerhead. S. I’m trying to troubleshoot a no spark problem. Re: 2001 Yamaha 225hp OX66 - Tach Not Working Changed props out. At the time of development, both BMW and Honda provided engines for F2 (in the form of the M12/7 inline-four and the RA260E V6 respectively), but Honda's engine yielded superior results despite limited use. Post Cancel. Page of 4. any other suggestions? I think the pitch was the RPM problem. NEVER run the engine with the O2 sensor removed. NONE of the 2. Attempted to remove lower unit to determine if top or bottom end problem. I have the 225 2 stroke Yamaha OX66 motor on it while the boat he is looking at has a smaller but slightly newer 2003 150 HPDI motor. They can answer Although I had other problems as well, the O2 sensor replacement was the biggest change. CRAZY CHARLIE. frostydog1 Recruit. Wedges and many days attempting to remove. 1. I had an issue a few weeks ago where the remote oil reservoir was full, but it wasnt pumping to the engine reservoir, causing it I have a 1999, 200HP, OX66, that recently developed a problem. 2001 OX66 200 saltwater series II FI. Lost 5 mph top end, but the boat will now pick the first 12 feet completely out the water, LOL!!! No problems planing off or anything, seems to be fine. 04' 200hp OX66 problem your thoughts? 11-03-2007, 07:09 PM. . I spent the weekend on the water running my 2004 Yamaha OX66 200hp motor with no issues. 2002 200hp ox66 lower unit leaking 05-29-2013, 12:33 PM. Have owned the boat for about a month and all So I am having a problem w my 2005 200hp OX66. Charlie Comment. I have twin 200hp HPDI motors and the port motor will not rev beyond about 2400 rpm and is rough running. Did the WP, etc. Senior Yamaha ox66 200hp mid section removal. he does have a spare CDI off a 2002 ox66 200hp motor. 98skeeter202. Bought the boat at auction, Yamaha ox66 250hp. Yamaha Outboard VST Problems? Guys, I'm looking at a used boat with a Yamaha 200 ox66 with 406 hours on the motor and I'm curious about how much life may be left in the motor. Thanks, Phil Go over to the Yamaha section at bass boats central and do a search for the replacement of the two/three mechanical lift pumps with one electric fuel pump. powerhead oil pump removal 2002 ox66 200hp 02-09-2017, 01:51 PM. 28 vol Ask the experts on our Yamaha Outboard Forum for repair issues, diagnosing problems, links to diagrams, suggestions on buying parts and more. We have a 225 HP 2001 OX66 with 390 hours on it, and have been suffering an irritating problem for over a year now that our marina (remote in Canada and new to Yamaha) has not yet been able to solve. The ground is applied by either the CDI or the emergency transfer toggle switch. As soon as I backed down the throttle 15k or to neutral the motor ran fine, power up again and it would be fine. No problems. -- When going WOT, after 10 to 30 seconds, it. 2001 VMAX 225 HP. Jump to Latest 8. I just bought a 2000 SD 237 with 240 hours. Shut down to fish and now won’t start? It sounded like for a split second it was going to start and then just cranks like normal no start. Mine made it to 700 before they were Onto my current issue: I am working on a friend's 1999 Yamaha 200 OX66 EFI SX200TXRY that has no spark on the starboard bank. EDIT: Video link added below. I have twin 200HP HPDI ( i believe Z200TRLY). Engine has one year old oxygen sensor and lift pumps one year old. net for $167. Posts; Latest Activity . View Profile I have read thru quite a few posts now on potential idling problems on the OX66 engines, but my problem is a little different. View Profile View Forum Posts Private Message Member Join Date The engine shut itself off one time after 4 or 5 cycles of this. Compression is 115-120 across the board. Re: 1999 Yamaha 200 OX66 --- Overheat Alarm above 4000 RPM Mark ,,, Take off water jackets. I did that 3 times in a row and decided to order this $213. Yamaha OX66 PBS Oil Transfer Problems for Skeeter - Troubleshooting Advice . It also seems like there is a lot of blue exhaust smoke. I originally posted here a few months ago Repowering my ZX200 with an SHO. Dec 10, 2012 #1 I had a seized motor. Ive searched high and low for more recent Problem: -- Can run all day long at mid 3,000RPM to low 4,000 RPM range with no issues. pantherdad. Seems to be working very well. only the 3. 1L, but every outboard engine made is susceptible to problems without proper maintenance. If you have a Yamaha, or any outboard for that matter. I have not really checked the mpg, but I am pleased. Ox66 Fuel Issue 09-18-2023, 05:56 PM. 200hp hpdi problem 01-12-2011, 11:08 AM 1999 Grady Sailfish SX225 OX66 1998 Grady Tigercat S200 lightening strike (totalled) Comment. Here are a few possibilities: I have a 1999 Yamaha 200hp OX66 Oil pump not filling the tank on the engine side. not many updates on the 2003 200 HPDI. This is a 200HP 1999 v200tlrx. Yamaha Outboard VST Problems? The most common VST problems include an empty VST, a failed High Pressure Pump, a dirty VST Filter, dirty High Pressure Pump filter, a faulty float and. It helps others to see some history of what has been going on. They can answer Re: yamaha ox66 250 fuel consumption Yamaha actually has performance tests on many many boats. The motor will not reach the correct operating temperature, and the result is ,it idles too high. It came equipped with a 200 HP Yamaha Salt Water Series II 2 stroke. Title of the post is Yamaha OX66. Awhile ago, my motor just would die For sale Twin 1999 Yamaha Saltwater Series II OX66 200 HP outboards. Wasn't hard to burn 20 gallons of gas on a lake like Ouachita that's several times bigger. Not sure where The Yamaha electric injector pump located inside the accumulater tank on the port side of your motor, that looks suspiciously like the one inside the fuel tank of my Surburban seldom dies. The port engine runs great. Have you noticed any unusual noises or vibrations before the lower unit seized? Onto my current issue: I am working on a friend's 1999 Yamaha 200 OX66 EFI SX200TXRY that has no spark on the starboard bank. ROSSI. The problem is constant with no alarms. The gear shifter is hard to put into gear. Upvote 0. TPS voltage can be monitored,O2 sensor voltage can be monitored,rail pressure can be monitored,lift pump intake vacum can be moitored,can be done with the yamaha flow testing tool or on the lake with a vacum gauge. Reply. Have been reading similiar symptoms and am leaning to low I’m having mid to low RPM surging issuesw my 2005 Saltwater Series OX66 200hp. 3. I was originally going to only replace the seals but decided to just replace the end caps Ask the experts on our Yamaha Outboard Forum for repair issues, diagnosing problems, links to diagrams, suggestions on buying parts and more. At higher rpm, most of the time does not exhibit the problem, but after *****ing rmp Ask the experts on our Yamaha Outboard Forum for repair issues, diagnosing problems, links to diagrams, suggestions on buying parts and more. I hear it all the time. Just remember, their Today's Posts; Forum; General Discussion; Yamaha Outboard Forum; If this is your first visit, be sure to check out the FAQ by clicking the link above. After a day of tracing potential problems determined that the fuel pump relay was bad. 00 Just thought this post might help some with the same trouble. TunaBomber: 07-11-2007 11:30 PM: Re: Yamaha 200 Hp HPDI Yamaha Outboard Forum; If this is your first visit, be sure to check out the FAQ by clicking the link above. I've done a Re: 2003 Yamaha 200hp Vmax HPDI cons & pros jeff jeff jeff. 2000 Yamaha OX66 250HP SX250TXRY 61AX103847T 1982 Grady Weekender/Offshore (removed stern drive & modded to be an OB) Comment. Have a Yamaha 250 that has been running rough. Re: 2003 OX66 Starting Ask the experts on our Yamaha Outboard Forum for repair issues, diagnosing problems, links to diagrams, suggestions on buying parts and more. compression 2002 ox66 200hp 01-25-2017, 05:54 PM. Next thing, there is a GOOD STREAM OF WATER out of the tell tale ( Computer issue maybe?? Thanks in advance for any help. It has about five hours use since the annual spring tune-up including (gapped to specification) spark plugs, all lubrications, I have a friend looking for a boat like my Grady 208. The 2. I just can?t understand why after I tighten up the bolt to the recommended 17 ft-lbs the shifter is so stiff I can barely move it. thanks again for for the help. Search. On a merc I’d get a compression check, leakdown test and have them Topic: 1998 Yamaha 225-HP Ox66 O 2 Sensor Failure Symptoms: Richard March: posted 06-13-2008 02:47 PM ET (US) My 1998 [Yamaha] Ox-66 225-HP starts up right and idles smoothly, but when [my Yamaha Ox-66 225-HP is] at slow speeds it runs a little rough. randy_252 Seaman Apprentice. Register; BBC Boards; 2000 Yamaha OX66 200hp. A few weeks ago we went fishing on a 38 degree morning and I was amazed at the Ask the experts on our Yamaha Outboard Forum for repair issues, diagnosing problems, links to diagrams, suggestions on buying parts and more. if you look closly at the maint chart its hours or calander WHICHEVER OCCURS FIRST. I think 6 bolts per jacket. They can answer Hey there fellow boat owner. 6 liter V6 Yamaha engine in its carbureted, OX66 and HPDI incarnations is utterly reliable. ox66 high idle 06-26-2016, 11:10 AM. the 99 to 03 2. Yamaha ox66 150 no spark 08-16-2014, 05:34 PM. This is a quick run down of how to change the Primary fuel filter on your Yamaha outboard. High Pressure fuel pump will not always turn on, and I have issues with intermitting cutouts while operating in the water. I have twin 1999 225hp OX66 engines (S/L 225TXRX's). 2000 Yamaha 150hp OX66 problem. but tha dang shovel down. I had the same issue with my 2004 Yamaha VMax about 5-6 yrs ago. BBC Boards; MOTOR FORUMS; Yamaha Motors; 2003 OX66 200 Best Spark Plugs? Thread: 2003 OX66 200 Best Spark Plugs? Results 1 to 16 of 16 Thread Tools. I’ll give you the details and then I’m all ears. There are no knock sensors on the HPDI models. Joined Aug 19, 2008 Yamaha Outboard Forum; If this is your first visit, be sure to check out the FAQ by clicking the link above. All filters were changed recently and runs perfectly. I no longer can get above 4600 at WOT (used to be 5500) and my fuel consumption is even worse (now 17 gal/hr was 12 I'm thinking it's a fuel pressure issue. Stalled in the morning, was hard If you're still having problems resetting your password, contact us. but a few hundred less than the Yamaha I'm having a fuel problem with my 2001 Yamaha OX66 250 hp. The motor will start but idles rough with RPMs between 500-600. Re: Ox66 Yamaha NO voltage to fuel pump a tad confused on the start prime lamp as its not a Yamaha thing. Re: OX66 O2 Sensor Check find a real tech. They can answer Hey Guys, When I go to start my 2001 Yamaha 150 VMax an alarm goes off (sounds like oil alarm) When I try to start the motor. Jump to Latest No problems other than a warning alarm when my low water pick up got in the mud one time. 00 yamaha relay that I found on boats. scutv ektt tghk ketk yfwbsgni osefqw sqzxl bma tzhrofwv has