hey, Im using an OS 91 fs ll 4-S. Its new but, has been run in with several tanks of fuel. My question is... how hot should the motor get after break in? The rpms should be between 200-12,000... using my Hanger 9 prop "tach. meter" it says Im only getting about 7500 max rpm.. If I start leaning up the mix jet it picks up rpm but, it runs hotter of course... the motor has a black cap on the cylinder should I be able to touch this for any length of time or should it be to hot to touch? Im using the rpm meter outside in sunlight... thanks for any help or tips.