I recently bought a boat for the first time. I purchased 17' Bayliner with a 1993 Mercury Force 70 HP motor. I bought it off a gentleman who claimed the engine had less than 100 total hours on it. After buying it I took it to the Marina to get it winterized (I never used it for personal use because I bought the boat in late October) and when I took it there the service manager told me that the lower unit was cracked and when he pulled the drain screw off the lower unit the grease came out pure grey in color and he told me that it appears that the gears and bearings would have to be replaced on the lower unit. I wanted to know from anyone with any experience dealing with this type of maintenance what my expected costs would be in getting the boat repaired? FYI, trust me I plan on taking the person who sold me the boat to small claims court for the costs.