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Yamaha waverunner oil in airbox

I have oil running into the hull checked all oil lines and they are fine,seems to all be coming from inside airbox

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6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

finish line
  • 207 Answers

SOURCE: My 2005 Yamaha FX HO Waverunner runs smoothly, but

yes yes yes the new yamahas foul plugs like crazy i dont know if it is a valve defect or what but you will be changing them every year one trick i have been doing to my coustmers watercraft and has been working well insead of ngk cr9eb plugs use a cr8eb it is a hotter plug there for it will burn better and no it will not hurt your ski trust me i have over 15 yrs ex and 6 in r&d research and design

Posted on Jul 08, 2009

finish line
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SOURCE: 2006 yamaha waverunner wont idle

what is it idle at? how much? remove your seat check air filter if is black oily remove it and see if that fixes your problem you may want to change your spark plugs as well # one cylinder may be starting to foul the new yamahas are the worst for fouling plugs use a cr8eb instead of the cr9eb the 8s are hotter and work better try those and let me know thank you

Posted on Jul 09, 2009

  • 1 Answer

SOURCE: 1997 yamaha waverunner 3

My 97 gp760 did this. I checked almost everything. Replace or clean your plugs, then run carb cleaner through your fuel filter both ways, and then spray carb cleaner into the fuel line from the fuel filter to the carbs. Run 10 minutes, more carb cleaner into the fuel line, and run it 15 more minutes. Then zip tie fuel lines at the fuel filter. I figure there was trash or buildup in the carb. Its easier than rebuilding the carb. Try it. Daniel at the MEXPIPE Pto Escondido Oaxaca.

Posted on Jul 27, 2009

  • 1 Answer

SOURCE: excessive smoke coming from waverunner exhaust

is their a trick to putting on exhaust 1998 waverunner xl 1200?

Posted on Aug 23, 2009

  • 1 Answer

SOURCE: 1994 Yamaha Waverunner 3 will idle but wont take throttle

Switch to reserve tanke to check to see if there is a clog at the fuel pickup in the tank.
My friend had the same issue with his waverunner 3.

Posted on Aug 31, 2009

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What is the size and year model of my yamaha waverunner the hull id # yama31321394


Yamaha did not make the GP model until 97 and if the numbers you posted are correct you have a 94, that being said all yamahas up until 93 were either a 500 or a 650 so im guessing its not a superjet which is a standup so you may have a waverunner 3, Raider, Blaster, or a wave runner LX. What colors are on it? does it have twin carbs? there will also be a sticker on the engine cases noting engine size.

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Oil in airbox


Hi, Anonymous oil leaking from your air cleaner is caused by oil carryover from the engine. For whatever reason, the breather system is not separating enough oil mist and air from the piston downstroke. There are cheap and quick easy fixes and there are more expensive ones. First, make sure your breather hoses are not dry and cracked if they are ok you can start by trying the following:
1. Run your oil level half way between the add and full mark when hot.
2. Run oil breather lines from the head into a TEE fitting below carb/induction module then a single line into a mini filter under the frame.
For more information about your issue and valuable "FREE" downloads that you will need please click on the links below. Good luck and have a nice day.
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1999 2003 Yamaha XJR1300 Service Manual Moto Data Project
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