Well, once again this engine dispelled the old wive's tale about needing after run oil...it runs great after sitting idle for about 1500 days and nights in a dank barn.
Almost let it go with a Rossi carb! I forgot about doing that swap, must already be senile.
You will just have to get by with the stock carb.........[
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Run it rich in an easy to fly [light] plane. This sucker leaned out 1/2 way through the tank and really screamed with a 9x4. The 9x4 is THE prop for this engine.