(Rocky) wrote in message . com...
snip
A little trick that I learned back in the early 50's, and pass on to
all who don't know of it, is using the PRIMER to keep the engine
running if it shuts down for carb ice. The primer injects fuel
directly into the intake manifold bypassing the carburetor and can
keep the engine running intermittently and in many cases generate
enough heat for the carb heat to become effective again. I've used
this technique a few times in aircraft to get home. In Pipers (PA25
Pawnee while crop dusting) and Cessnas (C-172 and 177).
Ol Shy & Bashful

I've heard this before, but haven't yet found anyone who can explain
how that would work. The development of carb ice causes the engine
to run rough/die because the ice is blocking air from entering the
carb. This generally results in a very rich mixture. How does adding
even more fuel via the primer help the engine to run??

John Galban=====N4BQ (PA28-180)