92 Mercury 60HP trim tilt issues after new new motor

[fxsales]

Good Day to all,
First of all thanks to all of you for hours of reading and information. Unfortunately, I now have to post, as I am frazzled on a tilt/trim issue.
My dinghy (Zodiac 14') has a 91 Mercury 60hp with electric tilt/trim. It is a single cylinder system with switches on the engine and throttle. Recently it quit qorking, unless hit with a hammer (lightly) Upon inspection the electric motor was rusted and presumed dead. I bought a new motor and reservior, and went through the pains of replacing it. (lift engine off of transom to get to back allen screws etc. Before installing new one I tested both switches in both directions to make sure the relays were functioning correctly. Sealed everything up , released trim valve and lifted the engine to full up. Tightened relief screw. Filled to threads with trim/tilt fluid.

Sorry for the long intro.. I've found thorough details eliminated extra posts.
Now here's what happens. Engine trims down about 1/2 way the stops (trim motor still running) wait awhile then it might work, might not. It will usually trim back up when it hits that level. Sometimes several "taps" on the switch will make it move again. It is most problematic when the engine is tilted all the way down and I need to tilt it up for trailering.

I have tried everything that common hydraulic sense dictates. Even went as far as cracking the fill plug with the engine down to see if there was air in there. Have also raised it, when I finally get it up all the way, and checked and added fluid.

Again it will go up or down periodically but just stops mid-way for no good reason. The motor still runs but no movement..

What can I possibly be missing here????

Thanks in advance....

 

[RRitt]

Re: 92 Mercury 60HP trim tilt issues after new new motor

you might have the rocker arm pump. It is tough to say which trim pump should get the golden bonehead award. Mercury rocker arm or Calco wankel. It is close. The rocker arms get finicky when the pump gets old. Even the smallest amount of debris can cause intermittent failure because there is so little room for error in rocker arm actuation. The design before the rocker arm was a great design. The rocker arm is a direct descendant. To take one of the best ever designs and revise it into one of the worst ever probably pushes mercury ahead of Evinrude in the bonehead competion.

At any rate you need a hydraulic rebuild and flushing. Got to do both halves. Your pump is hyper-sensitive to debris. $200ish to $300 depending on pump/manifold/debris/condition.

 

[fxsales]

Re: 92 Mercury 60HP trim tilt issues after new new motor

Thanks for your input. After logical conclusions I was leaning that way also. Now I've got to track down an honest Merc mechanic, who's done one of these before. I hate paying for on-the-job training.

I'm pretty handy with things that can be fixed with a hammer, screwdriver, or elbow.... beyond that it tends to cost more to get it re-fixed...

j

 

[RRitt]

Re: 92 Mercury 60HP trim tilt issues after new new motor

I assume that your unit looks like the one in this parts diagram?
http://www.boats.net/parts/search/M...G)(USA:G359967-BEL:9934136 AND BEL/parts.html

If you buy a new pump from mercury it is about $700. They don't sell the parts to rebuild your pump. However, Mercury is discontinuing a lot of small tilt systems from mid-1990's. If you look closely your will see that the pump half of the system pictured will fit your ram. Simply take off the distribution block and bolt it onto your existing ram. I would not be surprised to see this system show up in iboats liquidation corners or Ebay in the $250ish range.

 

[fxsales]

Re: 92 Mercury 60HP trim tilt issues after new new motor

Good Morning,
Actually it doesn't look like that at all. The motor (on mine) is round with a two wire assembly. The reservoir/motor assemble sits on the pump mainfold, and has a weirdly shaped "O" rings that has to sit precisely as the curves of the "o" ring are not symetrical. One side has an odd little curve. Iy can only seat in the grovve one way. The pump looked more rectangular with a curved dome type top on it. Again, I'm going by memory from a couple weeks ago.
Just for Sh&^s and giggles, yesterday I took an old pump from a gear lube kit that I'd never used and did my best to pumpout as much fluid as I could, and flush it with new fluid, to no avail. When I stick my pinky in the fill hole the actual pump seems roundish on top. I could be a year off on the year of the engine, as I only had documentation from the broker I bought it from, and have not checked for ID numbers or the like. It could be a 91... I know the hull of the boat is a 92, per the title and HIN.

Here's the motor reservoir I have
http://www.iboats.com/mall/partfinder/?*******=080571015&gd_grid_id=1706&gd_poid=187631&gd_row=32&**********=630627297

Thanks again for your effort.

j

 

[RRitt]

Re: 92 Mercury 60HP trim tilt issues after new new motor

yes, i know ... that's the point. You take everything from your existing system except the ram and throw it away. Then you take the brand new pump assembly for $200ish and bolt it onto your ram. Use the trim limit from your old system to set the horsepower.

you get whole new system for about the same as just a motor.

 

[RRitt]

Re: 92 Mercury 60HP trim tilt issues after new new motor

for example ... here is a pump on ebay. The guy prolly can't give it away because the part number is for Force engines. Very few Force owners are going to be interested in it because they have to take their existing trim system off boat in order to install this pump. It doubles or triples their work versus just buying an aftermarket or rebuild. So you have a part that nobody can use.

or do you?

If you unbolt the distribution block then it is the exact pump needed for your system. Bolt your existing ram and trim spool onto it and you got a new system.

http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&item=140410252229

 

[fxsales]

Re: 92 Mercury 60HP trim tilt issues after new new motor

Hello,
I kust wanyed to take a minute ti thank you for all of your assistance on this issue. I took a couple weeks off the problem as I had work/travel issues to deal with.
I still haven't decided what to do, as the damn thing works intemittently ebough to use, when I need it.

I just didn't want to disappear out into cyberspace without acknowledging your help, and my appreciation.

Thank you
John

 

[RRitt]

Re: 92 Mercury 60HP trim tilt issues after new new motor

They stopped selling the motors with round gasket and went with the universal fit about ten years ago. No matter what system you have your 60-115HP single ram motor is going to look like that.

The pump looked more rectangular with a curved dome type top on it. Again, I'm going by memory from a couple weeks ago.

you know - there really isn't much you can do. Mercury doesn't sell the parts for you to fix the pump. They just sell you new pumps at $700 a pop. Maybe you have an air bubble between the memory piston and the main piston and it is causing you to falsely read fluid levels. Run it up and down 4-5 times. Every time it is all the way up check the fluid.

If problem persists find somebody to rebuild the pump or buy a new one from Mercury. - or - better yet, keep your eye out for a NOS Force as shown above to pop up on Ebay.