Will Not Start!!

[st_omangum]

I have a 97 seadoo sp. i took it to the lake last summer after it had been sitting for about a year. I put new battery on it before i left and cranked it at the house twice. when i got to the lake and put it in the water it wouldn't crank and hasn't since. ive tried everything. it hardly has any compression. Whats wrong with it??

 

[st_omangum]

Please Help need to get running.

 

[timmyboy76]

start with compression test, if under 100psi, then needs to be rebuilt.
With it not being in water, it'll start with little/no compression, but when in water, the load from it, makes it not start/keep running..

 

[kustomkarl]

I would do a compression test to see what's going on internally.

Here is the correct info on a compression test. It covers all the basics.
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 then there is a problem. I hope this helps you.
Let us know how you make out.

Karl

 

[st_omangum]

I will do the compression test. i talked to one mechanic and he said that the rings could be bad or siezed up from sitting is that true?

 

[kustomkarl]

Yes. if the seadoo has been sitting like you said, that could be the problem. If the compression is low it just might need to be re-ringed. Do a compression test first than go from there.

We have a seadoo manual in the library if you need one. It will help you do your own rebuild. It costs $10.95 for the month. You can either read it on line as a pdf file or download it and print it off you own personal and private use. We also have parts available. Click on the "parts" link for a parts break down and prices if you want to buy what you need. As always, we will be here if you get in a jam or have other questions.

Karl

 

[st_omangum]

Ok thanks a lot. I'll let you know after the compression test

 

[kustomkarl]

We're here for ya... :cheers:

Karl

 

[Chester]

Before you can do a compression test, you will have to get the engine to crank over. Have you tested the starter relay?

Chester