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Thanks, Lynn
25 hours means I change spark plugs about 2 times a year based
on the flying I do - so certainly not unacceptable. But, naturally 250
hours would be better {:>). $7.00 a box is certainly much cheaper than the
stock rotary plugs which are becoming non-stocked in auto stores around
here - have to special order.
Don't want radial cracks (or any other kind), so perhaps will
try the autolite AR2592.
Ed
----- Original Message -----
Sent: Wednesday, November 22, 2006 9:04
PM
Subject: [FlyRotary] Re: Spark Plug
Fouling and Temperature
Its interesting, we I use 100LL I usually get 25 hours
on a set of plugs. I wonder what factors might make the difference
between your time interval and mine - "Plugs Up"?. I have not run
across any chart that indicated anything other than a plug digit which
indicated a "hotter" or a "colder version". I think I may try
hotter plugs and see if they make any difference.
Ed
Look at an old rotor housing to see if there are tiny radial cracks
around the trailing hole.
This indicates an overheated spark plug.
That 25 hours seems acceptable to me. I would try Autolite AR2592. Very
cold heat range, good for racing. Thicker ground electrode. Order through
Autozone for about $7.00 a box of 4.
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