Re: Vacuum?

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Posted by Tony C on May 24, 2018 at 23:11:29 [URL] [DELETE] :

In Reply to: Re: Vacuum? posted by Bruce (VA) on May 24, 2018 at 21:19:01:

Pretty much the number for most gas engines regardless of configuration. 17-18 Needle steady, Drop to 5-6 on snap accel. 21 on snap decel. Numbers not set in stone, some engines in good shape will run a little lower or higher. I've seen a couple at 21.

I shoot for 17-18 when adjusting the idle mixture and initial idle setting.

Needle movements can be used for diagnosis. Low, Hunting fast,drifting lazily etc.


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