85 HP Trim & Tilt Install - so far so good

jgoedd14

Recruit
Joined
Dec 26, 2008
Messages
4
I am original owner of 1988 1700 Capri with 85 HP Force. It did not have power trim & tilt. I lived with it for 23 years. Well last month I saw a trim and tilt unit on ebay, off a 1989 85Hp force. Unit came still connected to the transom brackets, motor cover, swivel, etc. It included the trim ram, tilt cylinder, hydraulic lines, motor, and wiring harness (including relays). It is a 2-wire motor. Unit was clean, fresh water use only. Got it for $150 with shipping. Upon arrival, motor worked and trim and tilt went up & down.

So far so good.

Took a while to get it apart as the shafts were pretty well sized to the transom brackets. Lot of heat, Kroil, and beating to get them out. I never would have been able to get this apart if it were mounted on a boat. After getting everything apart I needed a few parts including: 4 Nylock nuts for both shafts both ends, DPDT momentary contact switch (in dash), circuit breaker (was not included), 3 bolts for motor, and 2 new shock bushings for tilt ram. It went in pretty good. Unit had ATF in it when I got it. I drained everything and went back to spec oil, straight 20W oil (Loews). Once installed it worked but switch operation was erratic at times. I figured it was the 20 year old relays, and the fact that they had not been used in a while. I ordered two new relays. That solved that problem. It works great. No leaks. Does not bleed down in any position.

To prevent shafts from seizing up with transom brackets, I intend to pull shafts annually, clean and lube with a never sieze grease.

Have not tried it in the water yet. Knock on wood, so far so good. Total cost $240.

Thanks to all the relavent posts in this forum. They were extremely helpful in working through this.

JohnG
 

RRitt

Captain
Joined
Mar 30, 2006
Messages
3,319
Re: 85 HP Trim & Tilt Install - so far so good

Jerry, your link doesn't work.

There is a SS shoe that goes onto the bottom of your swivel bracket. It is a strike plate for the trim piston. The aluminum isn't strong enough to withstand the force and will eventually split or wallow out. It should have been attached to the underside of the old bracket. You'll notice that over time even the SS develops a deep divot. Beat it out flat with a hammer. If you can find a piece of 1/8" SS plate to put under the shoe during install then that would be awesome.

As regard your shafts.
Don't fully tighten the nuts. Allow the shaft to float from side to side so that vibration will help prevent seizing. After all, that's why they used nylon lock nuts in the first place. Next, buy one of the flat anode bars that goes across the bottom of 1995-2005 mercury mariner force trim systems. cut it in half longways and bolt it to bottom of trim housing. with just a minor bit of caution you can easily drill some mounting holes into the aluminum housing. Get a wire wheel or dremel and epose some bare metal near mounting screws so that aluminum is in solid contact with zinc.
 

jgoedd14

Recruit
Joined
Dec 26, 2008
Messages
4
Re: 85 HP Trim & Tilt Install - so far so good

Like I said, I could not have done it without a lot of help from this forum. You guys are great.

No it did not come with the thrust bracket. I never even noticed this. I will fab something out of SS. I'm not gonna pay $22 plus S&H for that.

Great idea on shafts. I will check and make sure i leave the nuts loose so there is some lateral play.

As far as a zinc goes, i think i will hold off on that. The boat is a fresh water trailer queen and never has had any corrosion. I only use it 4 or 5 times a year at most.

Thanks again for the help.

JohnG
 

jkoppe73

Petty Officer 3rd Class
Joined
Mar 17, 2010
Messages
79
Re: 85 HP Trim & Tilt Install - so far so good

Part #F449354, $8.95 on ebay
 

RRitt

Captain
Joined
Mar 30, 2006
Messages
3,319
Re: 85 HP Trim & Tilt Install - so far so good

that's the part.
At that price it isn't worth the time or risk to try making something.
You might even be able to stack two of them to prevent stretching on bigger engines.
 

jgoedd14

Recruit
Joined
Dec 26, 2008
Messages
4
Re: 85 HP Trim & Tilt Install - so far so good

That's not too bad. At that price I will get it. New total for Trim & Tilt $250. Still not too shabby.

JohnG
 

alloffroad

Petty Officer 2nd Class
Joined
Jul 20, 2007
Messages
173
Re: 85 HP Trim & Tilt Install - so far so good

can you post some pics. I have the same boat and want to do the same thing to tilt my motor
 
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