1984 75hp Merc - Trim goes all the way up but only 85% of the way back down?

JKTrevecca

Petty Officer 2nd Class
Joined
Sep 20, 2009
Messages
110
The title pretty much tells the whole story/problem. My trim will go all the way and only about 85% of the way down.

When I bought this boat/motor to fix last Sunday the trim wouldn't go up. I lifted it up as the prior owner added fluid. Then it worked so it had been sitting w/ low fluid for a couple weeks. (prior owner hit a rock 2 weeks ago ripping off the lower unit).

When the motor stops at 85% down, the pump is still running but sound different/sick once the motor stops going down.

If I loosen the drain valve, the motor will fall the rest of the way down. Then, if I raise it back up, it will only go down 85% of the way.

I just fully removed the drain/manual lower plug and let all of the fluid drain out. There appeared to be some water in the fluid but I could be imagining that.

Any theory's on why the trim would work perfectly except for that last 10-15% of the way down? Thanks!
 

wrench 3

Commander
Joined
Aug 12, 2012
Messages
2,108
If the pump is on the motor you need to let the pump run for a couple of seconds after it gets to full travel and then recheck the fluid level.
Don't know if it's the problem but it may be worth trying.
 
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