I have an MS 362 chainsaw with a 20" bar. I bought it used last year (approximately 7 tanks ran through it), I ran it last year very little (1-2 tanks) and this year about one tank. I always cleaned it and got all the fuel out of it before storing it. I ran it last week and it ran great. Today I was doing some light bucking and it started to bog down/hesitate when I would get on the throttle (not in the wood). At first it seemed positional, as in when in an upright position it would throttle up as usual. Now it's having a hard time staying running. Gonna try to do some tuning tomorrow. The fuel is fresh and The fuel filter looks clean. Seems to be starving for fuel. Any suggestions?