are pwc's high maintenance? been thinking of buying a used one not sure what one yet. been looking at a 95 sea doo sxt and a 90 yamaha no idea what model it is. from what little i see on parts is pretty high. not looking for something real fast. been thinking of using one for fishing more than any thing. also im pushing 300 lbs. i to fat for one ? if i fell off of one not sure how hard it would be for my old 63 yr. old butt to get back in one. my knees are shot. any help is appreciated pro or con. thanks