Swapping Tilt/Trim to good motor from seized motor. Lube for shafts?

[adamjr]

I traded some tools I wasn't using for a 75 HP 1974 Chrysler that has a good looking tilt / trim unit. I removed it from the basket case and want to mount it on my 1972 85 HP Chrysler.

What lube should I use for the upper and lower shafts? There was oil on them but it was old and water impregnated. I'm just not sure if I just use bearing lube or if there is something marine specific. It is only going in fresh water.

Thanks in advance.

 

[RRitt]

Re: Swapping Tilt/Trim to good motor from seized motor. Lube for shafts?

use new bearings on lower and light coat of marine grease elsewhere.

 

[adamjr]

Re: Swapping Tilt/Trim to good motor from seized motor. Lube for shafts?

Thanks for your response. I'll stop by my favorite land-locked marina tomorrow to pick up the grease.

The bearings of which you speak, I don't see any bearings in the traditional sense. The assist shock and the tilt ram both have a split piece of plastic that runs through them. They're split in the same manner as a wire loom. Is that the bearing? If so I have been unable to find a tilt/trim service manual or parts list. Do you happen to have a part number?

I'm also looking to get a seal kit for the cylinders and trim ram but I'm not having any luck.

 

[RRitt]

Re: Swapping Tilt/Trim to good motor from seized motor. Lube for shafts?

crowleys, boats.net, ishopmarine, and other leading on-line merc dealers should have parts diagrams that you can browse from your computer. Yes, they are just thin nylon bearings. There is not a lot of motion on that shaft. The insulation helps lessen galvanic reaction between SS shaft and tilt/shock housings. If you want ot get fancy then bolt a slab of zinc on bottom of trim housing. Power trim is notorious for bearing the brunt of galvanic corrosion. The research papers from Miami done on the effects of saltwater specifically called out aluminum trim with stainless tubing as a worst case scenario. Point being that having good bearings protects your system both from the friction and corrosion angles.

My ebay listing expired. If you can't find them elsewhere just send me a PM. They're cheap at $22-$25 including cover bolts. I think any merc dealer will have the orings. Finding the cover bolts is a little more difficult. You need 1.75" long SS socket head.