1995 SPI 580 Iles, Stumbles after 3000 rpm

[seadog9]

Here's my problem, was running well for few days, then I noticed it was lacking top end. Then all of a sudden no top end just idle and slightly above, had to get towed in.
Here's what I did, Cleaned carb & Filter, replaced all fuel lines, replaced plugs, checked operation of fuel valve good, Fuses good, added fuel down carb at full throttle no difference, still stumbled.

 

[kustomkarl]

What is the compression ...that's a 18 year old seadoo.
Do you have a seadoo shop manual? If not here’s an idea for you. 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 private 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. Premium members get priority when it comes to getting quick detailed answers.


Karl

 

[seadog9]

Next step to figure out

Thanks for the info, I will have to get my comp. gauge out and do this, I was thinking of going for the prem. subscriber, just for the manuals, sounds like a good deal.

Bill

 

[kustomkarl]

Here is some info on a compression test.... To test compression, remove both spark plugs. Place spark plug caps on the plug cap studs near the cylinder head to ground the empty caps. This completes the circuit of the ignition electrical system and prevents any electrical problems from the caps being un grounded. Using the correct adapter for the threaded end of the tester,( same length of the spark plug threads length)screw in the tester in one plug hole. Hold the throttle wide open. Push the start button. Watch the compression gauge, when it peaks out at the most compression, let go the start button. Read the psi number. I would do it 3 times to be sure it is accurate. Check both cylinders the same way. The ideal compression is 150 psi per cylinder. If it is less, it's not a problem as long as they are close to being the same. If the psi is less than 90 it might need be time for a tear down and a rebuild. If the psi in 1 cylinder is say 140 psi and the other is 80 psi you need to tear down and repair. This difference is a lot and there is a problem. I hope this helps you.

Karl

 

[seadog9]

Understood

Thanks for all the tech, this will be my next step.

Bill

 

[kustomkarl]

Keep us posted on your progress. If you need any more help give us a shout.

Karl