I rebuilt the lower unit on this beast over the winter, because i had no reverse. Once opened up, i discoverd the shift cam was broke. I replaced with a new one and figured all would be good. Took to the lake for first test run today, and when putting into reverse, the prop shaft would seize, and motor would immediately die. Moving the gear selector forward would not release it. The only way to get the unit out of gear was to go back and spin the prop by hand (took a hard jerk to do it). Seems to be OK in forward. I tried to restart the motor, but couldn't, as it was still in reverse. I tried to move the shifter into forward as the motor was turning, but that wouldn't get it out of reverse either. Only by tilting the motor up so i could grab the prop and jerk it could i get it to unfreeze. Any suggestions?
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'74 merc 1150 locks up in reverse
- Thread starter okeyo
- Start date
I rebuilt the lower unit on this beast over the winter, because i had no reverse. Once opened up, i discoverd the shift cam was broke. I replaced with a new one and figured all would be good. Took to the lake for first test run today, and when putting into reverse, the prop shaft would seize, and motor would immediately die. Moving the gear selector forward would not release it. The only way to get the unit out of gear was to go back and spin the prop by hand (took a hard jerk to do it). Seems to be OK in forward. I tried to restart the motor, but couldn't, as it was still in reverse. I tried to move the shifter into forward as the motor was turning, but that wouldn't get it out of reverse either. Only by tilting the motor up so i could grab the prop and jerk it could i get it to unfreeze. Any suggestions?
happy
Active member
before you tear it all down.. i'd make sure my shifter was in right.. make sure its not a tooth off.... drop the lower down and see if it shifts the way it supposed too.. if it does.. then the problem lays somewhere north of the lower unit.. if it dont.. then there may be a shimming/ other clutch dawg issue.. at the moment.. i think your one tooth off on your shift..