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O7 rhino 660 runs good,then backfires and stalls.starts every crank,but will run short time then stalls.does not backfire everytime.seems like it runs longer when it sets couple of days.

My son run it into a river about a yr. Ago.i dont think engine got water.it ran fine until this occurred months later.i also have exhaust leaks.where should i start to diagnose this problem and steps thereafter.

Posted by Chucktrish Cline on

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Bill Boyd

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I would overhaul the carby and check for corrosion in the main jet and other circuits
if it is a 2 stroke I would check the crank shaft seals as they may be hard and leaking mixture and running lean ( backfiring)

Posted on Oct 11, 2015

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Why does it run well, then backfire and stall?


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It comes with instructions and is cheaper than having a shop guess at the trouble.

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