1991 Mercury Mariner trim-tilt

Golleysocker

Recruit
Joined
Mar 23, 2002
Messages
4
My trim tilt leaks down. If I lift it all the way up, it seems to hold it's position for a time while I am running. Does nayone have an idea what may be the problem?
 

Backlash

Chief Petty Officer
Joined
May 16, 2001
Messages
586
Re: 1991 Mercury Mariner trim-tilt

Hey Gollysocker,<br />Sounds like you need to rebuild the tilt/trim cylinder. Fluid is leaking past the cylinder.<br />Backlash
 

trevorcday

Petty Officer 1st Class
Joined
Dec 2, 2001
Messages
216
Re: 1991 Mercury Mariner trim-tilt

Before tearing apart the trim unit you should check out the manual release valve. It is the large, plastic, slotted head screw on the right hand side of the trim unit. There is a hole through the transom bracket to access it. You can screw the valve all the way out and look at the o-rings on it. If they are cut or damaged even slightly it will allow the trim unit to drop.
 
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