ORIGINAL: nitro joe
I would hope that not too many modelers subscribe to this practice of plumbing tape thread and, seat repairs. Reminds me of auto exhaust repairs with muffler patch,and bailing wire.
Take a look at this NGK tutorial. You really should get/make a flat seat style adapter, or have a Buddy add the taper to the seat as was suggested.
Partial NGK quote:
"The spark plug works as a heat exchanger
by pulling unwanted thermal energy away from the combustion chamber, and transferring the heat to the engine's cooling system.
http://www.ngksparkplugs.com/techinf...000&country=US
IF you noticed it is actually the ceramic insulator around the center electrode that does the heat transfer to the combustion chamber which is surrounded by "wet" coolant -or more technically-the heat range of the plug-also 2 strokes in small engine applications - AIR COOLED - do not use coolant jacket style heads-only air around the cooling fins of the head and cylinder -which is true of the statement from NGK-2 different cooling systems-"wet" and "dry"
Further discusion here
http://www.liquidcooledairpower.com/lc-ridofheat.shtml