I've got a 1977 35hp evinrude, Fishing yesterday and while running it just shut down, would turn over but not fire, pulled the plugs to check for fire and nothing, tried different plugs and nothing, let the motor sit for a few days, turned the key just for giggles and fired right off and ran for just a little bit, tried it again and nothing, compression is good with both cylinders and getting fuel just no spark, Most of the time, lol. Any suggestions , thanks.