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tubman · 11-02-2019, 05:10 PM

Here's a link to a set of very useful charts when it comes to spark plugs : https://www.sparkplugs.com/learning-...bering-systems.

The "L" series Champions I referred to are 1/2" reach. I believe that 5/8" reach would be too long.

11-02-2019, 05:10 PM	#13
tubman Senior Member Join Date: Dec 2013 Location: Minnesota, Florida Keys Posts: 10,319	Re: Spark Plug Protrusion into Head? Here's a link to a set of very useful charts when it comes to spark plugs : https://www.sparkplugs.com/learning-...bering-systems. The "L" series Champions I referred to are 1/2" reach. I believe that 5/8" reach would be too long.