Culver Cadet Section > Maintenance and Repair

Sparkplugs

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Tim Lunceford:
I was noticing that my Franklin powered Cadet seem to be down on power.  I had Champion REM 38s installed with 160 hours on them.  Mogas for fuel.  After checking mag timing and verifying that the throttle was opening all the way I changed plug to C10 S.  The power is back and the engine is running smoother.  I would like to hear if anyone has any opinions as to the expected life expectancy of sparkplugs in the Franklin engine.   Thanks, Tim

Bill Poynter:
I believe the REJ-38 plugs incorporate a resistor in the center post.  One of the failure modes is a breakdown of this resistor, resulting in higher resistance.  Do the new plugs incorporate resistors?

If the coils in your mags are weak, that could contribute to the difference noted.

Tim Lunceford:
Bill,  I do not know if the recently installed plugs have resistors.  They are old/new stock Champion and called for in the Franklin service manual.   Tim

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