MS660 Stihl chain saw engine won't start. Engine 4 yrs. old but less than 15 hrs running time. Was running fine than just stopped and won't start. Tried new plug, checked spark, added fresh gas and checked filter. Also, checked exhaust screen. Engine has good compression but doesn't even want to start when primed thru carburetor or plug hole
Garden - Oregon Scientific - Complete Carburetor for Stihl 4122 Brush Cutter and 4226HS...