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I have a 1999 yamaha
You must try to crank it by hand ,remove spark plugs so there will be little compression and then try to turn the motor it should turn without to much force this will indicate the motor has not seized when hooking up a jump start do not connect both leads directly to the battery ! the red + lead should connect to the red+ on both batteries but the neg lead - should not go to the battery post but to a ground usually directly to the metal engine cover or you can damage the battery !
Cavataion with my 800 yamaha waverunner will not
check hull type as a freshwater hull and a sea hull are different as sea water has a higher level of buoncy .Although i doubt if you will encounter a freshwater hull but it is a thing to think about and check.Main cause though could be lack of engine power for whater reason .
1997 waverunner 760 will run fast for 50yd then die fuelline & filter full of gas
does this happen repeatedly or just sometimes? check the one way vale and the line its attached too on top of the fuel tank then make sure theres no water in the fuel filter, if there is water in the filter it should be visible and kind of look like a bottle of salad dressing or oil and vinegar before its been shaking up.
No fuel to carbs waverunner yamaha XL760
I have one as well. Same problem and it got worse until I had to prime the carb to run. Fix is simple. 2 carb kits off eBay. Approx $30 ea new. Takes about 2.5 hours to do. I have never done before so I thought it was easy. What happens is the carbs have rubber diaphragms in them that act as a fuel pump. My old ones were really thin and worn. The new ones thicker and better. Put it back together and viola. It starts on it's own. I checked all forums about shut offs and external primers, pop pressure etc. Just rebuild your carbs. You'll be fine.
How to install check valve in Mikuni carb
Which check valve are u referring to? On the metering plate under the main diaphragm or the fuel pump side? The metering plate valve is held in with a plate and single screw the other side is held in with rubber grommets.
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