do you have any pics of the boat? is it similar to an svt? i havent heard anything bad about those motors but i honestly dont know that much about the black maxs. how many litres is the motor? carburated or injected? i would prefer a 2.5 merc. if you cant find the year check the serial number and call around or check online and you will be able to get a year with that. i used to own an older 2.4 parts were a little expensive and hard to come by for it. i doubt the black max is the same if its a good deal i would definitely be interested. hope this helps a little. i own a jet now but i would go back to an outboard if i found a nice tunnel hull with a 2.5 youll never look back