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- Apr 24, 2009
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Not sure why the 1/4 32 is in the pictures, it sure would be a bit large on that head, but would work. Looking at the 10-40 from the engine and comparing them to the ones you purchased looks like the new ones are about 3 or 4 threads longer. Not an issue as long as piston clears the plug. A long plug usually fouls a bit less.
When you get them all your questions will be answered.
Bob
When you get them all your questions will be answered.
Bob