Thread: New engine - intermittent backfiring - stuck valve?
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Old 10-26-2020, 11:59 PM   #16
Chuck Sea/Tac
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Join Date: May 2010
Location: Between Seattle & Tacoma
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Default Re: New engine - intermittent backfiring - stuck valve?
Sounds like a start. Do they show jet orfice flowtesting criteria? With a zenith, I have had to open the high speed jet.
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