Thread: Spark Plug Help
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Old 08-16-2018, 10:08 AM   #8
rpmerf
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Re: Spark Plug Help

Quote:
Originally Posted by Marine-58 View Post
I'm going to try to take a thin wire, bend one end and see if I can mark it at the top of the plug hole. Maybe it can be accurate enough?
I was thinking something like this. First time you put it in, leave the engine a little bit before TDC. Put 1 plug in, spin the engine around to make sure it doesn't contact. Wondering if you can put the engine at TDC and measure the distance from the top of the piston to the seat on the spark plug so you know how much clearance you have in the cylinder.
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