"G.R. Patterson III" wrote in message ...
Even if the STC for your aircraft is just a "paper-whipping" exercise, beware that
the STC on many of these aircraft specifies a minimum operational rpm level. It may
be OK to dump mogas in a Cessna 150 (to pick an example) without actually springing
for the SCT, and it may not. Unfortunately, I no longer remember the rpm level for
that plane, but my A&P had to adjust the carb a tad when I bought the STC.


I had the Petersen STC which also required a check for the presence
of composite floats in the carb. The previous owner skipped that
check and the floats sunk after a few months of autogas use. Ended up
with a giant puddle of fuel around the airplane.

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