I have a 1985 fineline/centurion 20' tunnel. It has a long story to go with it, but I will keep it short. It was sold without a motor for comp purposes only. there is a sticker on the dash that says "not for rec use, comp use only, does not meet safety standards" or something to that effect...
I have a 86 200hp black max hung off a 85 fineline centurion tunnel. about 5 years ago, the buzzer went bad, and after some stupidity on my part, I blew it up due to lack of oil. I rebuild the entire engine, at the time thinking the only option was to buy a used block. the rebuild set me back...