Launched boat today (50 hp 1975) and she kept cutting out at low idle. If i opened her up all the way, it sounded like she was running on one cylinder, until the RPMs would finally kick in then she ran smooth. Rebuilt the carbs last year, one new coil last year (similar symptoms, i believe) winterized at end of season new plugs this spring and good, equal compression this spring. The boat ride to the water is about 100 miles of highway. Good an electrical part be damaged trailering? Or does it sound like a bad coil?<br />Thanks