Tilt Trim issue - 1994 Force 120

jpwilly

Petty Officer 3rd Class
Joined
Jun 15, 2011
Messages
95
Re: Tilt Trim issue - 1994 Force 120

Best of luck with the floor that is a much bigger job hope you don't uncover bad stringers.
 

KC SlowCat

Recruit
Joined
Jan 13, 2014
Messages
5
I'm having similar problems with my Bayliner. I bought a 26ft 1992 Bayliner Rendezvous with a Force 120 on it back in November. I can hear the trim motor turning on when I hit the trim button, but saw no movement on the motor. I pulled the fluid cap and noticed it was empty. Topped off the fluid and it started leaking out of the bottom of the trim cylinder housing. I went ahead and ordered all new seals in hopes that would fix the leak. When I went to replace the seals, I noticed 2 of the 5 screws that hold on the cover had the heads broken off. I pulled the piston out and replaced the #2 O ring in the diagram below. I also figured out one of the hydraulic lines was stripped out where it screws into the bottom of the motor pump. I had that tapped out and a new fitting put on, but I am still having problems. Right now the unit will trim up, but not back down. It will tilt with my help, but as soon as it's all the way up and I let go it slowly falls back down. I'm not as much worried about the tilt. I just want to get the trim working. After reading this post, I cycled the motor a few times to purge the air out and I noticed the trim ram stop retracting in while trimming down. It will come out on its own, but will only go back with someone pushing down on the motor. The tilt will still only go up with assistance and falls back down once you let go. The bottom 2 screws that hold on the cover are still broken off in the housing. I wasn't able to get them out. I am wondering if not having all five screws in because of the broken screws are causing this to sit at an angle cause the trim ram to get stuck? It didn't do this 2 weeks ago when I replaced the o ring, but I had the boat out on the water and maybe the pressure caused it to shift??? It also looks like the motor is only trimming up as far as the trim ram will push it out - is this as far as it goes, or should the trim cylinder kick in at this point to give a little more trim? I've been messing with this for the last few weeks and I just can seem to figure this out. My boat sits super low in the front and just plows through water. I've got to figure out some way to get the front end up a bit. Sorry for such a long post. Wanted to give as much info as possible. Any help or feedback would be greatly appreciated!!!
 

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MickLovin

Master Chief Petty Officer
Joined
Feb 18, 2013
Messages
822
"The bottom 2 screws that hold on the cover are still broken off in the housing. I wasn't able to get them out. I am wondering if not having all five screws in because of the broken screws are causing this to sit at an angle cause the trim ram to get stuck?"
Answer is yes, if the bottom screws are snapped off this can cause the piston to be slightly off centre and stop from retracting. If you are having trouble with your boat plowing through the water, try a nut and bolt through the holes on the side of the motor to hold it up higher and not have to rely on the trim ram.
 

KC SlowCat

Recruit
Joined
Jan 13, 2014
Messages
5
I noticed today that there's a very tiny leak where the hydraulic line threads in. I dropped the boat back off to the mechanic that tapped out the stripped hole on the pump. Hopefully that's my problem. Now I just have to figure out how I'm going to get the broken screws out.
 

jpwilly

Petty Officer 3rd Class
Joined
Jun 15, 2011
Messages
95
Remove the cover again and drill out the stainless screws (carefully so that you don't bugger up the housing) that are broken off. Clean out the threads with a tap. Don't expect this to work correctly or reliably with the bottom 2 screws broken...your just asking for a problem on the water until this is fixed properly.
 
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