Hello everyone, a friend of mine is selling me his 1993 seadoo xp, when i took it out for a test ride. It fires right up and runs strong for about 15-20 mins, then starts to bogg upon acceleration. He claims the motor has been rebuilt. Is there anything i should look for before buying this one, or a simple fix for this problem?
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93 xp runs good till warmup then no power bogging
- Thread starter jessecool
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Welcome to the seadoo forum jessecool. That 1993 seadoo is old, so be sure it is in good running condition. A compression test is a necessary test to do. Here is some information on doing one;
Compression Check
You'll need a compression tester. Go to Auto Zone. I think they sell for like $25.00. The compression gage, will screw in the cylinder head in place of the spark plugs. To test compression, remove the 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 all the 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. The ratio of difference is 10% difference between cylinder readings.
Also here is a thread that might help you buy a used seadoo too;
http://seadooforum.com/showthread.php?t=134
I hope this helps.
Karl
Compression Check
You'll need a compression tester. Go to Auto Zone. I think they sell for like $25.00. The compression gage, will screw in the cylinder head in place of the spark plugs. To test compression, remove the 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 all the 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. The ratio of difference is 10% difference between cylinder readings.
Also here is a thread that might help you buy a used seadoo too;
http://seadooforum.com/showthread.php?t=134
I hope this helps.
Karl
I didnt even see a buzzer or anything like that. Since it is pretty old, it looks pretty simple. just a twin cyl. rotax 2stoke motor, carbs airbox. and a sealed box the plug wires go into. From looking inside everything seems to be pretty clean. Except the box the wires go into isn't mounted secure and when riding i will bet it gets bounced around. I will get a compression reading in the morning. How do i go about a leakdown test?....Thanks guys for the help
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