hey guys. i was wondering if some of you might be able to help me. i got an old wheelhorse 724z. 24 horse onan and the problem im having is some times it will fire right up. and other times i have to crank it over about 15 to20 times. and there have been a couple of times it just would not start. im pretty sure it is a spark issue. because i can smell the fuel when it dont want to start. and i have heard that usually when a coil is bad it will start good when cold but start cutting out when it gets hot. not the case here because once it is running it will run for hours without a problem. and it is very hard to start if it sits for a couple of days.