Last year had major problems with my husqvarna 246 saw after storing it for a year. Stripped the thing down during the winter and got it running great ... then left it sit for 6 months. The 2 cycle is mized 40:1 with husqvarna synth oil using fuel stabilized with either seafoam or stabil (dont remember what was in the big can back then). Went to use it today and it did NOT Want to run. Initally started and then died. Tookk an hour fiddling with it anf adjusting low speed mix and throttle screw. Runs pretty good now but some hesitation and bog. Plug is prestine with perfect gap Time for carb kit, user error or something else?