Bob wrote:
To All:

Annd if
you've done like most of us and wrapped an over-stretched screen-door
spring around the exhaust stack, odds are it rusted itself into FOD
during the Eisenhower administration.



-R.S.Hoover

Yes, I was concerned about the doorsprings corroding and breaking pieces
off to be ingested into the carburetor since there isn't any sort of
filter in the "warm" air path between the heat muff and the carb airbox...

One thing that is different on my system now (since my recent top
overhaul) is the addition of an air inlet on the engine baffle between
the nosebowl and the cylinder (pilot side) with tubing running from it
to the heat muff. My old system just had the inlet pipe of the Aeronca
heat muff unconnected to anything and I noticed that the aluminum heat
muff looked like it had melted a bit where it was contacting the exhaust
pipe so I added the cool air inlet to help cool the heat muff a bit.
Maybe it cools it too much and I'm just not getting enough heat, so
increasing the surface area sounds like a good idea...just unsure of the
method. I know I DO NOT want FOD running into the carb as that is SURE
to cause the engine to react [not so] funny



Scott