I know it's impossible to estimate, but what ballpark am I looking at if I needed to do a basic rebuild on a 1985 volvo-penta 4 cylinder I/O? I know they might find issues when it gets torn apart, but if it just needs a regular rebuild. Any help would be great. I'm looking at buying a close to mint condition, (everything but the engine), 1985 Bayliner 18.5' I/O. The over all condition of this boat is great. Not even a water line on it, & no it has not been cleaned up just for the sale. I've been watching this boat for over a year now & bam! for sale sign. I gave it a good look over & I'll be dragging it to a local shop for an inspection of the engine this week pending weather. I was just looking for some numbers so I'm not sticker shocked. Tanx, Maxx