o2 cleaning sensor for Yamaha ox66 3.1l boat problems 02 carbon buildup
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- เผยแพร่เมื่อ 21 ส.ค. 2024
- Hey there fellow boat owner. This is a quick run down of how to clean the o2 sensor on your Yamaha outboard. The symptoms on the boat this motor was on would let it get on plane but it would not let it top out. It would also act as if it was starving for fuel after a short run and it would slowly lose RPM's. You need to always keep your filters clean as well so this doesn't lead to more expensive damage. I also changed the VST fuel filter and Primary fuel filter at the same time. Be sure to check those videos out as well.
o2 sensor:
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Thank you for taking the time to make the video it was awesome and save me probably $1200… My boat is now running perfectly again
kraigrrr no problem, hopefully it stays that way
Great video. I've have a 2000 200 hp OX66 that I always use Yamaha Ring Free in the fuel. Never had an issue with the O2 sensor or any carbon fouling problems.
Had some issues with my sx200, been sitting up and trying to diagnose the issue..replaced the high pressure pump because it wasn't priming, failed bench test....replaced and still wouldn't start. I pulled injectors off and 3 wouldn't do anything. Used another video here to make a little injector cleaner with shrader valve...got um working and still wouldn't start. I decided to check the o2 sensor and sure enough it was disgusting. So much carbon and gunk, cleaned it out for 45 mins....got it back together...turned key and viola...starts in first bump of key....I wouldn't say the O2 was the problem 100 percent but definitely helped....thx for the guide. Wish I could post a pic of the sensor...prob never been cleaned.
I just changed my o2 sensor with an after market for $30. 👍👍👍
Where did you order it on
@@mr.kichler1442
Amazon
NTK (NGK) 21006 for my 2000 ox66 250hp. I had to splice the old connector to it.
there is a zircon (fake diamond) as the working o2 sensor, that is the element responsible for the oxygen particle reading. if it is covered in carbon it will barely make a reading. cleaning the outside of that cover will do not much at all im afraid, it will pay to clean with carb cleaner soaking overnight then blow out with air compressor, it wont hurt to follow this guys advice either.
Very good explanation of how perform this maintenance. Thank You
Thank You, Glad i could help
great format for a how to video.
Short, fast, no talks about last night's dinner 👋
Thanks!
Have a low idle alarm kick on same exact motor! Any clues on where to start
i dont know of any low idle alarms. I know the alarm will go off if the oil is low or it is overheating.
1st check oil in reservoir on the motor (holds around a quart) and the large supply in the boat where you normally add oil.
2nd you either have something clogging your water intake / or exit , or you need a new impeller. You boat can still start pee water even if you need a new impeller, generally you replace ever year or two.
hope this helps
Thanks for the video - it was a great help. Unfortunately - I have been having a "rich' issue and fouled up shortly after. Any assist on checking whether o2 sensor is still good?
David Vuchinich I am not sure
Thanks for the help,
Charlie Summerville no problem. I hope it keeps you on the water.
Do you know why there would be oil coming out of there? I took the cover off and had about a cup of oil drain out of it.
Thanks for taking the time to make this video and share your skills.
No problem. Hope it helps.
So I took a boat out for sea trial, put in water and was absolutely no power when you put it down. It would kick into gear but would not rev at all. He’s fixed it and blamed it on o2 sensor. Just wondering if that’s actually the case with my scenario
When you turn key over are you supposed to hear the fuel pump running
I’m sorry but I do not have it anymore to run out and check
Hey I have a question ! I have the exact same engine and when I’m in idle the engine will run excellent but once I put it in forward it seem like the engine is starving for gas but it only does it when in forward. WOT it runs great and even when I slow down and back to 2mph after running a while it’ll run fine . It seems when I let the engine sit for a while and turn it back on and put it into forward it’s starving for gas.. what could be my issue?
Hi, I have the same problem as you describe here. Did you solve the problem??? I'm at a loss as to what it could be.... Thank you for your reply.
Love the videos they have helped! We have the same motor on a flats boat and the motor always wants to hesitate to start and get going and once it does it smokes pretty bad and then clears up. Also when going in a no wake zone it seems to run rough like a hardly haha but on plan it runs great. Any ideas on what it could be. Im going to replace the VST filter and check the o2censor but just wanted to see your thoughts.
Nock and Release see about removing carbon from your top end. (Look for a video). May look at replacing plugs after you clean everything and run it. Plugs are possibly fouling. Also don’t
Know if your running premix or still using the oil injector. Make sure you are not OVER oiling.
@@idcsports551 Yes we are going to try it thanks
No
So which one was the problem? And did doing all 3 fixed it? Was on the lake yesterday and it would be normal then drop rpm then back to mormal...like it was starving for fuel.
I did all three and it fixed it. I figured the VST filter was the main culprit. It was very dirty, but it runs awesome now and any speed,
could this cause any issue with my motor not coldstarting?
hey man great video! I have the same motor and year, have you had any issues where it seems the engine does not rev up on a cold start? seems to start up at 500 rpms and does not go any higher unless i rev it up to 1100-1500 rpms manually. Any info would be helpful as i haven't found anything yet on the issue.
Mike Mercier i never had that kind of problem with mine.
IDC SPORTS Alrighty man thanks for the reply, i’ll try doing more research👍🏻
question. My hurricane GS202 has the same motor. The boat doesn't have the water separator. All this motor his is the outboard internal filters. Does that sound right? Should I have a large water separator?
cyrusdavirus007 it should be just like this one. The water separator filter normally has a orange plastic floating ring in the primary filter.
@@idcsports551 yeah some boats have a additional water separator on the boat itself. Mine doesn't . Great videos. Very helpful.
cyrusdavirus007 ok, mine didn’t either
When you remove the Oxygen sensor and housing and tube, is the passage in the engine case open to the exhaust?
No, it’s just a little bore hole that leads to the exhaust/cylinder wall. Clean it as well. NTK 21006 is a cheaper alternative to the yamaha part.
Have you ever had TPS issues with that motor?
drill4gas none
My 2000 OX66 250 hesitates at around 1800 RPM. Below that is fine and above that runs smooth and strong all they way up to 5500 RPM.. Could my O2 sensor be dirty and or bad? What about my LP pumps. I think they are original. Could a leaky diagram cause this issue.. I cleaned my VST and other engine filters. I also changed my spark plugs..
Check your o2 sensor and make sure you clean the tube. I don't have a video how to check your LP pumps so you will have to look that up about the fuel bulb and the bolts you need to take out to see if they need replaced.
Could be lots of things. Process of elimination
Correct me if I'm wrong, but isn't that the point where the engine switches from the low pressure fuel pump to the high pressure fuel, which causes a stumble until your RPMs go above that spot in the RPM range? I too have that on my 250 OX66 and it's a pain when I'm running in a slow no wake area against the tide. The engine stumbles as it RPMs vary around the 1800 RPM spot, due to running against the tide and hitting other boats wakes, thus impacting the engine's RPMs. Normal or not???
Stephen. I changed the 3 LP pumps on my 250 OX66 and the problem is still there. My VST fiter is clean and my Micron filter is new. I will attempt to clean the O2 senser next.
I was told that our motors run on 4 cylinders under 1800 RPM. after 1800 RPM the other 2 cylinders begin to kick in. It is that in between stage is when it runs like crap. I think I have something else going on with my motors. In addition to my sputtering at this RPM, my motor fluctuates at higher RPM, indicative of a bad O2 .
Thank you for providing me with that information. Thank God for the internet and people sharing information. I found an informative article on THT , which was taken from "Bass & Walleye Boats" magazine regarding the Yamaha OX66 engine's fuel injected motor's operation, troubleshooting, O2 sensor testing, O2 sensor removal, and O2 sensor installation. It appears to be very well written and certainly informative. I hope that it helps you.
You wouldnt happen to know the part number for the o2 sensor would you?
Justin Blair I don’t know, I will look it up sometime tomorrow if I can find my book.
@@idcsports551 I changed both filters but I still start losing speed at about 64 mph the rpms start dropping and it slows down until I let out of it and then hit the throttle again
Justin Blair I still can not find my book, I would think it could be your fuel pump or pressure problem that you need to let off so it can catch up
@@idcsports551 how do I go about doing that
Justin Blair I’ve never messed with certain parts.
Simple things to do searches for and check.
Fuel bulb stay hard. Vst tank stay full. Noisy pump, do google searches for diagrams or leak down test
Any type of cleaner that works best?
I will check and post back to you when I get back to the shop to find out which specific brand.
Will this condition cause a temp alarm to go on?
Stephen Robbins I don’t
Think so but it could be a contributing factor if it makes your boat run abnormal. To regulate heating cooling
You forgot to utilize that drill bit to clean inside the tube of that barbell looking thing.
I used it in there but it all came out easy.
TIP
Dont use Yamalube ots the worst oil ever and exactly why they recommend ring free
I use Toyhatsu FULL SYNTHETIC oil and sea foam every 3rd fill up and O2 sensor NEVER needs cleaning in over 8yrs still reaches peak RPM
What chemical do u use to clean it
Seafoam
Thanks
#whatelsedoyouclean
anything you can get your hands on
Junk