Motor won't trim up while motor under power

[destaf]

I have a 1997 Mercury 90 HP Force. <br />Motor will trim up fine at idle, very slow speed, or when motor is turned off. However, as soon as I give it some throtle, the motor will drop back down into the water if she is already trimmed up or, if not trimmed, only rises about 25% an acts as if it hit an obstruction and won't go any further. destaf132@yahoo.com

 

[rcb175]

Re: Motor won't trim up while motor under power

While I am not familiar with your motor, if the tilt unit is hydraulic, it sounds like the piston is compressing under load. Check the oil level in the tilt unit.<br /><br />Rcb

 

[destaf]

Re: Motor won't trim up while motor under power

THANKS FOR THE REPLY. I SHOULD HAVE MENTIONED THAT I CHECKED THE PUMP FOR FLUID LEVEL AND IT WAS FULL. I ALSO CHECKED THE BYPASS SCREW AND IT WAS TIGHT.

 

[rsavant]

Re: Motor won't trim up while motor under power

Force tilt/trim motors and pumps are pretty bad about having internal O-Rings leak. I am going through the same problem on my 125, I just haven't had time to address the problem. Do a search for Force Tilt/Trim, there are numerous posts and some excellant replys on this problem. There is at least one reply in particular that pretty much guides you through the process of replacing O-Rings in the pump. Good Luck!!!

 

[rsavant]

Re: Motor won't trim up while motor under power

Force tilt/trim motors and pumps are pretty bad about having internal O-Rings leak. I am going through the same problem on my 125, I just haven't had time to address the problem. Do a search for Force Tilt/Trim, there are numerous posts and some excellant replys on this problem. There is at least one reply in particular that pretty much guides you through the process of replacing O-Rings in the pump. Good Luck!!!

 

[destaf]

Re: Motor won't trim up while motor under power

THANKS FOR THE HELP. I AM SOMEWHAT MECHANICALLY INCLINED AND I'LL GIVE THAT A TRY. BUT WITH ONLY A MONTH TO GO IN THE SEASON FOR ME, I'LL LIVE WITH WHAT I HAVE AND HAVE THE ENTIRE OFF SEASON TO FIX THE PROBLEM. WHAT HAVE I GOT TO LOSE. I'VE ALREADY BEEN TOLD THAT NEW PUMPS WITH INSTALLATION WOULD COST OVER $1200!

 

[BlueVIP]

Rsavant I have a 125 force and am having the same trouble. If anyone on here could direct me in the right direction on how to check the fluid level in my trim/tilt unit it’d be appreciated.

 

[GA_Boater]

Rsavant I have a 125 force and am having the same trouble. If anyone on here could direct me in the right direction on how to check the fluid level in my trim/tilt unit it’d be appreciated.

Please start a new thread. This is 16 years old!

Closed.