Force motors arose from the old Chrysler outboard and were bought and marketed
as a division of Mercury.
They were a bare bones product that cheaped out on a lot of integral components resulting in frequent powerhead failures.
The 150hp 5 cylinder had particular problems with bent drive shafts and
cylinder scoring.
I had a 1993 trophy with a 120 force and no problems. They improved the bottom end in 93 for all thats worth. The motor is still running as far as I know but most are POS's. If the boat is a good deal get the motor checked out and start looking for a replacement. I ended up with a 175 Mercury on it and it worked out great, I wouldn't put anything smaller than a 150 on the back.
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