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Yamaha waverunner starts to lose power after 5 minutes

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Discussion Starter • #1 •
I have a Project (or pos) 88 Yamaha 500 Waverunner I bought for cheap. We got it running and it will run fine but after a few minutes and it will get sluggish. Let it sit for a while the same thing happens again. There was some trash in the gas tank so I cleaned that out but the problem persists.

Suggestions or Ideas anyone?
 
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