Hello i have a 1974 sea ray sedan with a 460 engine. it turns over but does not turn on. there is fuel in the carb but it still does not turn on. engine turns over but not with alot of power. do i need to get bigger batterys with more cranking amps. right now i just have one 1000 crakcing amps battery. but it seems like it doesnt turn over fast enough. could there be a timing issue please let me know thank you x2703@aol.com