261 c-m cold start

My new 261 c-m, with only a few tanks through it, was run dry on idle and drained after last use. Pulled it out to do some yard cleanup yesterday and filled about 1/4 tank of 3 month old non-ethanol 40/1 mix - Same non-ethanol mix that is running fine in my 562xp. 261 c-m started after 12...