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It is a new motor to me, and I know little about it. It has 120 pounds compression in both cylinders.I cleaned and blew out the p***ages in the carb. I replaced the plugs. It will start and run at mid and high rpms. Under mid range it backfires (or something like it). It won't idle at all. It puffs air out from behind the fuel filter with each backfire. Any ideas?
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Check to make sure you are getting fuel to the carburetor. Does it spit fuel out the carburetor? Check the timing. -
Update on 35hp issue
The motor isn't backfiring. It is compressed air in the hose from the byp*** cover to the intake manifold. It burned a hole through the hose. I replaced the hose, and it burned through again in 10 seconds. It isn't a constant flow, but more like a big blast every few seconds. It won't idle, but runs ok at mid and high rpms. ???Comment
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Could have bad reeds, could still be a carburetion issue, could be incorrect timing, its really hard to say without having direct access to the vessel. At this point I recommend taking to an authorized dealer.Comment
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