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rotorwrench · 10-27-2019, 05:05 PM

We pay over 100 bucks a plug for fine wire aircraft plugs. Even the heavy electrode ones cost around 35 bucks a apiece but they don't last a fraction of the time a fine wire plug lasts.

If your engine is running rich, it will even fowl a hotter plug. If it's using much oil it will fowl easier. I'm not sure if a hotter plug is available for the 7/8" tpi type plugs. It's more likely than the Model T 1/2" npt plug though. I don't know if any of the modern one piece type plugs are any better but they seem to work OK.

10-27-2019, 05:05 PM	#2
rotorwrench Senior Member Join Date: Jun 2010 Location: San Antonio, Texas Posts: 16,422	Re: Champion 3xs or other plugs? We pay over 100 bucks a plug for fine wire aircraft plugs. Even the heavy electrode ones cost around 35 bucks a apiece but they don't last a fraction of the time a fine wire plug lasts. If your engine is running rich, it will even fowl a hotter plug. If it's using much oil it will fowl easier. I'm not sure if a hotter plug is available for the 7/8" tpi type plugs. It's more likely than the Model T 1/2" npt plug though. I don't know if any of the modern one piece type plugs are any better but they seem to work OK.