Hello Everyone. This is my first post on this forum. I have a pair of SeaDoos, ’96 & ’97 GTX. The ’97 runs great, but I am having a hard time getting the ’96 to run right. I acquired these Jet Skis thru a trade about 1½ years ago. I was not able to get the ’96 to run and discovered the engine needed a complete rebuild which I had done by Fairchild Performance (Fairchild Performance home
) in Missouri, very nice people. I put the engine in a month ago, and it fired right up. Now to the problem.
The ski starts right up and idles great but starts to bog down at 2500 to 3000 RPMs. The first time out, I discovered that if I pumped the throttle, I could get it past the bogging, and it ran fine at 4000 to 5500 RPMs (I didn’t want to push the new rebuild). After an hour or so, it would not jump past the bogging. Because I was running extra oil in the gas for the first tank after the rebuild, I figured it was the plugs, so I changed them out. It would now jump past the bogging but only intermittently.
I was told it was in the carburetor setting, and I have tried numerous settings with no luck. I have been to the lake several times, always with the same result. It will start and run very easily up to 2500 RPMs. Once in a while, it will get past the bogging; when it does, it runs fine.
Here are the things I have tried:
Adjusting the idle needle valve (start @ 1 turn out)
High-speed needle valve fully closed
Replaced the fuel filter in both carbs (didn’t help)
Checked the sediment bowl/filter for the gas tank (clean)
Swapped the coil/starter relay/plug wires from the ’97 (didn’t help)
Swapped carbs from ’97 (didn’t help)
I’m really at a loss here. I still think it is in the fuel delivery system somewhere. When I pull the plugs, they are not oil-fouled but are wet with gas. Any insights would be greatly appreciated.