Re: tilt/ trim on my 60 Hp Merc(1992) not holding& slowley comes back down?
The trim motor works and lefts up the motor but slowly the motor comes back down ?I did check the oil level was full( some oil spit out)Any body knows
or had the same problem?do I have to remove it or can it be fixed where it is? any repair link on the net?
If fluid is low then the system lifts up to the point where the pump runs dry. It stops lifting and holds. It does not drift down due to low fluid or air bubbles.
On your system the position of drift down is important.
If the system does not drift down when lifted over halfway then the problem is in the spool valve circuit.
If the system does drift down when lifted over halfway then it could be either the ram or the pump.
If the system lifts more slowly as it goes up and eventually slows to zero then it is usually the ram.
If the system lifts smoothly all the way up but then sinks down when you release switch then it is usually the pump.
It does not really matter what is broken. It takes 95% as much effort to fix one portion as to do a full rebuild. If you miss something then your effort becomes nearly double. If you go into a repair like this then go into it with the intention of a complete rebuild. It does not pay to start playing whack-a-mole with trim system problems.
it needs to be removed to do any repairs.
I usually have an ongoing listing on Ebay for mail-in repair service. It may have expired last week and I have not relisted yet. I have not run across anybody else who fixes that system. I think Merc dealers will tell you that you have to buy a new system. It is built by the oildyne division of parker hannafin and sold as an integrated hydraulic action system. I think the trade name is EHA. If you have a local P/A distributor they may be able to point you to a repair shop. Your mechanic may also know a local shop. However, they are unusual devices and if somebody is not familiar with them then it could end up being a lot of labor hours to pay for.
Another valid approach for repair is to watch ebay for the manifold/pump assembly. They are like $700 from mercury. Which is ludicrous to pay more for a part than a whole new system. However, every year or two one with a discontinued part number will pop up on ebay for cheap. IF you replace the whole pump/manifold/spool with a new one then a $20 ram seal kit gives you a new system. The rams are anodized on inside and the only contact is with rubber seals. Since there is no metal-metal contact the rams almost never have any wear.
well - kind of rambled there. that's what I get for typing before cofffee sets in. Hope it answers your questions.
