Just took my boat to the dealer for complete motor tuneup, etc. This motor has less than 40 running hours but has been sitting for about four years. It ran fine last time I used it. Dealer called and said "compression is 70/50/125 so the motor is basically shot". Now I'm definitely not a boat motor mechanic or expert but just to tell me the motor is shot seems a bit careless. I asked if they had pulled the head to check the gasket and they said "well we wondered if you wanted us to do that". (not gettin a good feeling here). Now my question, what are some of the more common possibilities for this problem ? (head gasket, rings ? who knows what else?) Any input will definitely be appreciated.....