Im looking at a boat with a 75hsp Merc. motor. Nice looking boat that needs some tlc. OH this is a ?? deck boat aprox. 17ft with a center console. First story was that the motor was serv. last year but now its been at least 3. Tanks and fuel line were left with gas in them so I know about this. I am asking for him to clean them and start motor. What other things should I be looking at?