1974 Spark Plugs

rubypacheco

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What type of spark plugs do I need for a 1974 Stuery Boat with a 55 hp Crystler?
 

jestor68

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Jun 12, 2012
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Re: 1974 Spark Plugs

Well, according to the Champion spark plug chart, the 50 hp and below use a QL86c/L86c.

The 55 hp and above are listed as using the QL82c/L82c. The plug gap is listed as .040.
 
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