The warning light and oil symbol come on when my Yamaha Waverunner VX Cruiser reaches 6,000 rpm in the water. It can run fine at any rpm under 6,000 but once it hits 6,000 rpm the warning and oil lights come on. Out of the water and attached to a hose it can rev almost to 8,000 rpm wihtout a problem. It had the same problem last season when there was too much oil and it clogged the air filter. The air filter has since been replaced and the oil level is perfect. I'm at a loss as to what the problem is now. Anyone have an idea?
Check wire connections are clean and check the oil sencer !
SOURCE: have a 2000 yamaha XL700 waverunner. Will not
If the waverunner has an electronic "key" lock, it could have gotten tripped. We had this problem happen in the past where everything was fine, then it was tipped over and quickly back up... suddenly it wouldn't start. Used the remote and unlocked it - then it started!
SOURCE: MY 2002 YAMAHA GP 1200 WILL IDLE FINE AND ALL 3
Try and cover the easy and cheap stuff first. Open up your electronics box first so any condensation/moisture can dry out. Moisture or condensation in the box can cause intermittent /bad running and be very hard to diagnose. I have purchased several very good, inexpensive ski's that just had moisture effecting the electronics.
Next, disassemble the carburetors. There may be enough room in your machine that you can take off the covers one at a time to check this with out having to remove the whole carburetor rack. If the diaphragm side of the carburetor with the teeter-totter needle set up can be accessed easily. Lay a clean white sheet under the carburetor rack and carefully take the tops off, clean the white corrosion out of the needles on the low corner of the carburetors and replace the needles if worn. Be careful not to stretch or alter the springs. After cleaning, carefully reassemble the carburetor tops and close the electronics box putting a thin film of grease on the o-ring. With any luck the quick corrosion clean and electronics box dry out should take care of your running issues.
SOURCE: 1996 yamaha waverunner is overheating. has a good
most common problem with overheating when you have good water flow is the thermostat is stuck open replace it.
SOURCE: my 1992 yamaha waverunner iii 650 is taking on
I know this sounds obvious, but make sure the plugs are screwed in.
usually 2 of them at the back of the waverunner.
i know i forgot to put them in one day and by the time i parked the truck & trailer it took on so much water the motor was half submerged.
Hurried and pull the truck back and got it out and let her drain iout the plugs, then fired it up.
anyhow, if thats not it then your hull must be cracked and leaking in, take seat off at the ramp and see if you can see where its coming from, if you don't notice anything, then its coming in through
the ports at the top of the wave runner under the steering assembley housing, those tubes are made to direct the water to the bottom, if you have an auto matic bilge pump, make sure that is working or it won't pump out the water like it is supposed to.
hope that helps
Big Al
SOURCE: I have a 2001 Yamaha
Several things can cause the problems you describe. 1) If there is a mouse nest in your waterbox, adding water to the nest plugs the exhaust causing the poor running. When it drys out on land it runs fine. Cleaning out the water box will not be easy on that model but a careful inspection of the exhaust outlet may tell if critters are the cause of your problems. 2) Corrosion in the teeter/totter needle inside the carburetor can also cause low power on the water. Try cleaning the carburetor. Warning: be very careful not to modify or stretch the spring on the teeter/totter. 3) Water in the electronics box can cause shorting and low power. Open the electronics box and inspect it for moisture. Leave it open over night to dry it out and put grease on the o-ring seal when reinstalling the cover. 4) One last possibility would be burnt or stripped screw on tops on the the spark plugs (if they are not solid top plugs), fouled spark plugs, or burnt out resisters in the in the spark plug caps. Replace the plugs ($3 each) and the spark plug resister caps($5-$8 each), make sure the screw on domes of the plugs are on tight. with any luck one of these checks should fix the problem you describe.
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