The engine runs fine it just cuts the spark plug life down
to 50 or 100 hours. All the guys are forced to use 100 LL on
their cross country trips due to the rarity of auto fuel.
Paul Lamar
I wouldn't necessarily agree with that statement, as it fouls my
plugs badly. I swore off the
stuff. I'm looking into contacting EAA members near my fuel
stops to
help me get mogas, or to
see if gas stations near the airport can deliver mogas to the
airport for me. 80 Avgas works
fine when it is available.
You would think if my engine was running so lean, the lead
wouldn't
be such a factor???
Perry
You might need hotter or colder plugs Perry. What have you tried so
far?
Some of the other guys do not seem to be affected as much.
Also you are running the stock ignition as I recall. An MSD system
will punch through lead fouling as it has a much more rapid rise
time.
Paul Lamar
I ran some BUR7EQP in all four locations, hoping to extend plug
life.
Went back to BUR9EQ in the leading. MSD could be a solution if you
absolutely have to burn 100LL, but I'm looking at alternatives to
avoid it.
Perry Mick
I'm still wondering about using an anti-lead-fouling additive
like Alcor
TCP concentrate (Aircraft Spruce, p 158). Has anybody tried it?
Al
Yes, someone mentioned it to me. I'll get some and keep it in the plane
in case of emergency (so it might be awhile before I actually try it).
Perry
Perry-
I think I saw a few cans on the shelf at Columbia Airmotive in Troutdale,
(OR), 503-665-4896. You have to catch them Monday-Friday. They
aren't on
TTD, about a mile up the hill.
Mike
Mike McGee, RV-4 N996RV, O320-E2G, Hillsboro, OR
13B in gestation mode
Why is it my O-470 aircraft runs on 100LL without fouling
the plugs? Perry are you injecting crank case oil or mixing
two cycle oil with the fuel?
Paul Lamar
Damn, I was just at Columbia Airmotive yesterday!
I am doing both, mixing two stroke and injecting. Aircraft engines are
designed to deal with that crap, but some don't do so well from what I
understand. The O-235-L2C is notorious for lead plug fouling.
--
Perry Mick
Custom Composite Props
mick@bridgingworlds.com
http://www.ductedfan.com
It is hard to figure as they use rather weak magneto ignition systems.
Perhaps the crankcase oil has something to do with it.
As I recall there was something about synthetic oil having problems
with lead. What kind of oil are you using in the crankcase?
Paul Lamar
Plain old 'plane engines have complete control over mixture all the
time. As soon as my engine lights I pull the mixture out so it won't run
above 1200 rpm and taxi out that way. I also lean at anything over 1000
feet and before takeoff if it's over 3000'. That keeps the plugs clean.
My Lyc is the 150 hp 7.5 compression E2G with 2 mags. I ran 130 octane
everywhere south of Martinique because that's all you could get. The smell
of the lead made you lean back when refueling, never mind the 100LL
stuff. I didn't change or clean my plugs for 75 hours on that trip and
they were clean when I pulled them. I was running lean of peak for most of
that trip.
Mike McGee, RV-4 N996RV, O320-E2G, Hillsboro, OR
13B in gestation mode
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