OK - Took carb apart...checked all the passages with thin piano wire, carb cleaner & compressed air...No blockages anywhere....Running fresh, non ethanol gas, with a good dose of Starthron.. Pulled out manual choke....long cranking before starting....after initial warm up runs good on 1/2 choke...can rev engine, no hesitation...with choke wide open idles good however stumbles and wants to die upon acceleration........