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Top speed

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dittrichw

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I recently purchased a used Seadoo challenger 1997 (1 engine). Top speed is about 35 mph at 7100 rpm. I think top speed should be about 55 mph. Any suggestions?
 
Welcome to the seadoo forum dittrichw. I own a Challenger/ with a 787 single engine also. Top speed is about 55 mph. I would suggest to check the wear ring and the impeller for excessive clearance. Wear Ring clearance for your seadoo is 1.0 mm or (.040in) Measure the clearance of the at the center of the impeller blades to the jet pump, with a 12” long guage. Measure from the venturi side of the jet pump. If the rpm's raise and the speed doesn't it means it is loosing pump pressure/ thrust because of the excessive clearance.
If you want to replace it you self it isn't a hard job and you could save money too. 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
 
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