YS 91 problem
No, it's not cowled. I wanted to wait for the engine to run in before putting the cowling on.
I'm not running the engine hard at all, just flying around at 1/3 speed, and sometimes pulling full throttle.
First it was difficult to get the engine to run at all. It seemed it would either run rich and quit, or run too lean... Maybe I've got a bad engine??
Lars