Two other thing I forgot to add... NEVER turn your prop after a crash until you have cleaned the dirt out of the engine! and also...condensation! Inside your fuel tank...and especially in a cold/hot damp garage...your fuel tank is a prime target for condensation...and right on down the fuel lines it goes...into your engine! Whenever I'm not going to fly a plane for awhile, I always take both fuel lines off and put a union between them, and then take a seperate piece of fuel line and run it from the carb nipple to the muffler nipple to seal the engine from the outside air.