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Spark Plug Gaps

WCT

Asked by WCT,
September 15, 2004

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WCT

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WCT

Posted September 15, 2004

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Posted September 15, 2004

I have a new set of plugs for my 1988 Yamaha 40hp but I don't know the proper gap setting. Bought the motor used and don't have an owner's manual. The plugs are NKG if that makes any difference. Any help will be appreciated. Ol'Sneller

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Surface Tension

Grand Master

Surface Tension

Posted September 15, 2004

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Posted September 15, 2004

Here ya go.
B7HS-10
.039

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hydro

Mentor

hydro

Posted September 16, 2004

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Posted September 16, 2004

Hey, I thought those were supposed to be gapped at 1mm??

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Surface Tension

Grand Master

Surface Tension

Posted September 16, 2004

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Posted September 16, 2004

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