Spark Plug Torque

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07-29-2002 | 08:05 AM

Jana

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From: Houston, TX

Spark Plug Torque

Slightly dumb question, but it's not in the book that came with the engine. What should the torque be for spark plugs for an HP500?

07-29-2002 | 12:32 PM

TomZ

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From: Virginia Beach

They should be snug. I've never heard of anyone using a torque wrench to tighten plugs. Get them snug and them give them a 1/8th turn. That'll keep'em in there.

07-29-2002 | 02:45 PM

klmken

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From: Alexandria, VA

I think the Merc manual says 16ft-lbs...

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