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 Spark Plug Gap 
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Post Spark Plug Gap
What would cause the spark plug gap on a stock 35 vanguard to continously close? It only happens on one cylinder and closes completely.

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Sat May 30, 2009 9:17 am
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Post Re: Spark Plug Gap
A piece of muffler in the cylinder. :lol:


Sat May 30, 2009 10:02 am
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Post Re: Spark Plug Gap
or a srew out of the carb!! :shock:

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Sat May 30, 2009 5:55 pm
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Post Re: Spark Plug Gap
or an exhaust valve that come loose :lol:

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Sat May 30, 2009 10:40 pm
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Post Re: Spark Plug Gap

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Sun May 31, 2009 9:41 am
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Post Re: Spark Plug Gap
Wouldn't the valve have to be broken since the plug and valve are next to one another on the head?

Could detonation cause the plug gap to close?

Best bet is to pull the head and check it out though to see if something is loose in the cylinder.


Sun May 31, 2009 2:41 pm
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Post Re: Spark Plug Gap
Thanks for all the input guys. He's gonna bring the motor to someone close to him to have it checked out. I'll let you guys know what turns up.

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Sun May 31, 2009 3:39 pm
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Post Re: Spark Plug Gap

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Mon Jun 01, 2009 6:44 pm
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