Hi Folks,
IO550 310hp STC M20S owner here. Still figuring out my best hot start method after airplane was sitting for about an hour after landing; didn't look too graceful on the ramp and took a few attempts, but finally got it to start.
When I went to lean the mixture after it started, the engine decided to quit. Re attempted another hot/flooded start sequence and everything was running fine. Did my run up and all checked out well; but when I went to idle (mixture full rich during run up); the engine wanted to quit. Quickly advanced throttle to around 1,000 RPM and engine ran smooth. No engine issues for the rest of the flight.
Was this a case of vapor lock from the hot start? Have never seen this before on this engine. Any thoughts?