1998 gti revs up and down at high speed

[beckea2]

this started last summer and I took it too my seadoo guy and he realized that my nose cone broke off and let the oil out of my crankcase so I got that fixed and almost immediatly after i got it back on the water my mpem blew due to water being in my solinoid box so I finally have it running this year and it still revs up and down once you get over 25 mph. when slower it runs fine. it really jerks when your at top speed. this is a nightmare and I could really use some help with this. Thanks

 

[kustomkarl]

Is it possible that the rpm's don't go above 3500 RPM's? It sounds like the rev limiter is not allowing your pwc go above that speed. The rev limiter would act like a serging effect. Let us know, and I see what the cure is to repair it.

Karl

 

[beckea2]

Im not sure how to check the rpms but i don't think there is anyway that i could be going over 40 mph with the revs only gettings to 3500rpm

 

[kustomkarl]

uh... I thought you said you only got to 25mph...I think that model has a tech. What rpm range does it do it?

Karl

 

[beckea2]

oh sorry about that it starts reving up and down quickly after i get over 25 mph and there is no rpm gauge on the gti

 

[kustomkarl]

I wasn't sure if it had a tech or not ...Let me check the manual and see what I can figure out.

 

[beckea2]

great thanks very much for the help

 

[Vicious]

Carb filter??

It could be the internal carb filter being clogged enough to allow the ski to move but when you get on it, the lack of fuel flow starves the engine.

Just a thought.

Vic

 

[kustomkarl]

That could be a source of the problem too.

 

[beckea2]

well I half pulled the carb apart and cleaned the clear plastic peice which i believe was the diaphram and also found a a small filter and cleaned that to but i still have the problem is it possible i have low fuel pressure due to the diaphram not pumping enough fuel?

 

[kustomkarl]

If the diaphragm is torn or has a pin hole in it than it could be the problem. Hold it up to the light. After the carb is cleaned see if it works. I have had good luck just cleaning the carbs and not having to replace the diaphragms.

Karl

 

[beckea2]

ok i'll try to pull the carb apart i just hope i don't screw something up because i don't usually do things like this

 

[kustomkarl]

If you want you could join as a "premium member". As a premium member you can down load a authentic seadoo manual from the seadoo manual library. In the library is a variety of manuals for almost all years and models. You can view as many as you like on line as a PDF file, or download it and print it for your personal and privet use. There are operator manuals and repair manuals for you to do your own repairs on your seadoo. The repair manuals have everything from troubleshooting, repair procedures to winterizing. It contains wire diagrams torque specs and pictures for disassemble and assemble instructions. In the spec sheets it tells everything needed to maintain oil changes, spark plug gaps, carburetor rebuilds and impeller wear ring tolerances. Click on the "Seadoo Manuals" link at the top of the page for more details. If you need any help or get in a jam, we are always here to answer your questions too.

Karl