Hello, Pulled out the old snowblower last night tried to start and no go. It will start and run a while if I pour a little fuel into air intake. I took carb off cleaned it, flushed fuel tank and replaced the diaphram on the carburator still no go. Any other ideas? I should mention it is a Briggs 4 HP with the carb mouted on top of the fuel tank. Thanks for any ideas you might have.