Hey guys I have a 1980s model 30 hp evinrude. i have been having some issues with it. A little while back my impeller went out and i almost over heated it. after rebuilding the water pump i though i would be ok. the motor is electric start and when you start it the first time of a hunting or fishing outing it will start as soon as i hit the starter, it runs great, will idle and everything. but once i shut it off and and then try to restart it takes a minute or 3 for it to start. it seems like once it gets warm it does not want to start, but when it does finally start it runs like a champ. my uncle thinks it could be the timing is off? any advice is appreciated!