I have worked on aircraft both piston and turbine and consider myself quite able mechanically, however I am in the learning process of small two cycle engines, mostly chainsaws, and have become intrigued with the small two stroke engines. I have just recently taken one completely apart and have some questions on both crankcase seals and porting. I'm not talking about changing the porting just that I am looking at the engine and it seems that the piston doesn't go low enough to allow for fuel intake looking at the intake port. I took the engine apart because it wasn't getting crankcase pressure and vacuum to get the carburetor to have fuel flow. Like I said I'm new to this cycle and don't truly know what I'm looking at. Glad to join a forum that I will get some answers from.