cubs, you said it blows when you shut it off,did you mean when you trying starting it again while engine is hot?I'm no expert on elec. but it sounds heat related.like something is still on that shouldn't be but bad grounds being interuppted can cause a wire to heat so can arcing on positive side....might take a hand full of fuses to track but removing 1 wire at a time from main switch might prove a point.I'm even wondering if sol is staying in on mode or maybe starter is getting too hot..other issues causing heat could be plugged fins,low oil, most of this has been said in previous posts by guys who surely know more than I