My little OS 25 FX seems to not want to start when hot. At the start of the day it only needs two flips to get it going, but if i try to start it right after landing it won't fire at all. If I let it cool down for about 10 minutes then it will start right up again. shouldn't it be easier to start when it is hot?

Most of the engines I have are the same way(32sx, th 46). They start 1st flip backwards when cold. When hot, they require a starter. The smaller ones don't seem to care. They never start 1st flip, but it seems the same hot or cold.

I fly the OS 25FX in a H of B P-51D Mustang and when the engine was new it was very tight. It stayed that way for a dozen or so flights and then loosened up. I also had the tank somewhat high relative to the carb and lowered it by altering the foam padding around the tank. The really cranks now. I run it at peak rpm. It has to be one of the hottest mid 20 engines around. My P-51D is a flip-n-fly w/o rudder control and landing gear and it will flat move.