Always started a little rough in damp weather. Had -5 cold spell drained battery. Put charger on overnight. Next morning started right up but ran a little rough. Needed to get back in building so I shut it off and pulled key. Figured I would remote start it and let it run for awhile. But wouldn't start again it is now abut 50 outside and still wont start. Cranks ok but wont start, like it is not getting gas and/or spark. Any clues?
Pull the snorkle back from the intake and spray some carb/throttle cleaner into the throttle body. Replace the snorkle and try starting the engine. If it now starts (at least tries, or runs for a second and then dies) the problem is that it is not getting fuel. Then suspect a bad fuel pump or clogged fuel filter.
Post your result and i'll be glad to give further assistance.