150 merc with power trim stuck down need to trailer

[Mastervolume]

Can anyone tell me how to disable the power trim and then manually trailer lift on an early 80's 150 merc black max?


I have a boat that needs to be moved and hasn't been a a couple of years. The trim motor went out ( just replaced it) now it is seized up and the new trim motor won't move it so I will need to do it manually, I just don't have a clue as to how.

TIA

 

[gss036]

Re: 150 merc with power trim stuck down need to trailer

I would suspect that the release screw is on the lower starboard (right) side of the bracket. There will be a hole here that exposes the screw head, loosen it and raise the engine, then use a 2X4 or something to block the engine up.

 

[Mastervolume]

Re: 150 merc with power trim stuck down need to trailer

Nope no screw. There are two, 2 bolt caps on both sides that when opened reveal a threaded insert of some kind.

On the upper port side.

I can't see anything resembling hole you mention.

 

[Plainsman]

Re: 150 merc with power trim stuck down need to trailer

Is there a knob on the Hydraulic Reservoir ?

 

[Mastervolume]

Re: 150 merc with power trim stuck down need to trailer

I think so

 

[gregtobin]

Re: 150 merc with power trim stuck down need to trailer

You might try removing the lines and manually compressing the cylinder. Unless it is very rusty, you should be able to move it one way or the other.
If you it won't budge, perhaps you can figure something out from the following link posted by Smig:

http://picasaweb.google.com/Smig06/PTTManuals/photo#4980506385814650898

 

[Plainsman]

Re: 150 merc with power trim stuck down need to trailer

If there is a control knob, turn it full clockwise.

 

[Mastervolume]

Re: 150 merc with power trim stuck down need to trailer

Success!

on the front of the resivior there is a manual release control valve. It had long been broken off and would not turn after I cut a small screwdriver sized hole into the plastic. I ended up chiseling it out and low and behold out came the brown water (shouldn't this be oil?) and the engine released.

thanks for all of the help!