97' Seadoo Challenger 1800 RPM issue

[Chase605]

I have been searching the forum for a similar issue, but have not found the question answered yet. Hopefully you all can help me out!

97' Seadoo Challenger 1800 Twin rotax 110- one of the engines will NOT reach max RPM's in the water. Out of the water, hooked up to the hose I have no issues hitting 7,000+ with both motors. It just seems weird that it happens when I get in the water. Any thought on what could be causing this? Just for clarification - the RPM's are not jumping, they are steady at about 4500-4700.new impellers and wear rings as well.

Any help will be appreciated!

Chase

 

[Coastiejoe]

Do a compression test. And, unplug the rectifier and see if the issue goes away.


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[Chase605]

Compression tested at 150+ on both cyclinders. Just making sure the recitifer is located in the gray box -top right. Red wire?

 

[Chase605]

Does this twin rotax motor have two rectifers? In the gray box I see two? One for each motor I assume? If so, should I disable them both?

 

[howie099]

only need to unplug the one that is acting up so your battery will charge some.

 

[Chase605]

Well I was able to get her out and verify if the rectifers were causing the rpm issue, they were not. No change if I unplugged them. I did however have a leak on the motor I'm having issues with. One of the frost plugs is leaking water. Could this cause a rpm issue? Thanks for your help!

 

[howie099]

Water leak can effect the RPMs..