1988 force 85hp tilt problem

[cheese123]

I have a 85hp force and the trim function works but when it goes up past that the tilt just makes noise and doesnt go up...this was installed aftermarket and was my dads boat...while I was on the lake I jammed into reverse to avoid a log that I didnt see til the last second and now the tilt doesnt work and when I give it a little gas in reverse the motor comes up out of the water....Is there a rebuild kit for the power trim? I assume I blew an oring or somethng...any help would be greatly appreciated.

 

[jerryjerry05]

Re: 1988 force 85hp tilt problem

You have a 2 part system.Trim and tilt,the tilt cylinder was probably destroyed.You should be able to buy new at any Mercury Dealer.
I don't think it's rebuildable.You might get lucky with some of the guys on this site(they have old parts).In the pic you need the left one.J

 

[RRitt]

Re: 1988 force 85hp tilt problem

I doubt you blew out tilt ram because your trim is still working. You should double check that. With boat on trailer lift engine to top of trim. Go get a beer and see if it is still there when you get back.

 

[cheese123]

Re: 1988 force 85hp tilt problem

those look alot bigger than the ones on my boat, but you are saying the left one is the one that controls the tilt? also holds the motor from coming up when I put it in reverse? Thanks a bunch,

 

[RRitt]

Re: 1988 force 85hp tilt problem

if the shape is correct then it is same part. The tilt is the tall one with tubes connected. Trim is the short one that only pushes for a few inches. The tilt and trim are not isolated from each other. If the tilt cylinder has an internal leak than all of the trim pressure will bleed off through it. It is not physically possible for trim to hold if tilt has an internal leak. However, trim holds so much more fluid than tilt that the bleed down will be slower. You can buy a cylinder rebuild kit off ebay but it may not fix your problem.

 

[cheese123]

Re: 1988 force 85hp tilt problem

you are right, when I let it sit on the trim it slowly goes down so it makes sense that it must be losing pressure from the tilt cylinder..thanks for your help I think a rebuild kit will fix it because this thing sat for a long time before I got it. Is there a certain brand rebuild kit? I cant find a name on the cylinders.
Thanks for all your help

 

[RRitt]

Re: 1988 force 85hp tilt problem

you are right, when I let it sit on the trim it slowly goes down so it makes sense that it must be losing pressure from the tilt cylinder..thanks for your help I think a rebuild kit will fix it because this thing sat for a long time before I got it. Is there a certain brand rebuild kit? I cant find a name on the cylinders.
Thanks for all your help

Top seals were never sold separately and trim cover bolts are NLA. The only way you could ever get all the parts needed is through industrial supply houses like Grainger and Martin Fluid Power. But that usually means Quan=100, minimum $$ orders, and multiple suppliers. Try an Ebay search along the lines of "Force trim rebuild" or "Force trim kit" or "Force seal kit". I would stay away from the harbor freight orings.