Not much of a mechanic. Motor sat for a couple of years. it was bulletproof when it ran, so I figured I'd give it a shot, just to see if I can get it to idle. Carbs clean, fresh gas. New battery hooked to the harness: nothing. Thinking of pull-starting, but since the wiring is likely shot: worried that without the signal from the key switch, there is no chance it will run. Should it run without the key engaged?