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Message
What kind of
problems? How would a [small enough to be hard to detect] exhaust leak
cause such a massive power failure? What kind of failure might that
be? At 2100 rpm the plane is just barely capable of level
flight.
Hi Jim,
As I mentioned, this cracking of exhaust is probably more of a two
stroke problem, but I knew I had read a similar account where the exhaust crack
was the problem. The following is a reply to someone who was changing his
fuel pump again, because he couldn't figure out what was causing his problems.
Again, this was a Rotax. No reason to believe it would work the same on a
Lycoming, or a rotary, but I figured it wouldn't hurt to throw it out
there.
Rusty (happy to not be at the 110F heat index hanger
today)
I had a similar
problem a few years ago which had me running around in
circles. It
turned out I had a hairline crack in the muffler. When things
began to
heat up the crack would open and everything would go to hell, engine
would
roughen, egts would go up. I'd land and then start it again and
it
would run fine. It turned out the crack would only open up when the
engine
was at opperating temp. When the engine was cold you couldn't
see it. This
by the way is an excellent argument for using the Jet hot
process on your
muffler because it will show a black line or soot from any
leak. Anyway, good
luck, and take a good look at you exhaust system for
leaks.
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