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2014 Mercruiser 5.7L Stearndrive Tilt Problem

B

BroJames

Member
My tilt will come up, but it won’t go down. What is the likely culprit? I am an amateur boat mechanic. Thanks in advance for your help.
 
More info needed...


When you say it wont go down fully describe what you are doing when this happens and any noises/clicks/ no noises/clicks


DETAILS DETAILS DETAILS!!!""!
 
There are usually 2 relays one for down (green wire) one for up (blue wire) you need to find out if the down relay has power, ground & if it’s getting the signal from the trim switch. Could be no signal, or no power or ground to the relay. Or a bad relay or trim switch. Get a voltmeter & start checking
 
Can you find trim pump assembly?

If so can you find the two hydraulic lines that go into trim pump?

If so, loosen a little (do not remove) so some fluid leaks out. Let about a table spoon worth drip out.

Now retry the down trim button.
 
I am familiar with the trim pump assembly and the hydraulic supply hoses. I have changed out one of the hoses previously. So I can do what you suggest and get back to you, just May be several days as I am going out of town, thanks again for your time
 
my suggestion is to get a Mercruiser wiring diagram for your model and look at the section for the trim system. It is not a complicated system, there is the trim switch and its wiring, and 2 relays that are near the trim pump, that use a signal from the trim switch to turn on the high amp circuit controlled by the relay to run the electric portion of the trim pump.
What can happen is that wiring inside the remote control lever for the trim switch can break or, the contacts on the relays can corrode, and them one or more function stops working. I had that problem with mine and it was caused by water dripping on one of the trim relay terminals, easily fixed by removing the wire and cleaning up the terminals, then coating with marine grease.
 
louc said:
my suggestion is to get a Mercruiser wiring diagram for your model and look at the section for the trim system. It is not a complicated system, there is the trim switch and its wiring, and 2 relays that are near the trim pump, that use a signal from the trim switch to turn on the high amp circuit controlled by the relay to run the electric portion of the trim pump.
What can happen is that wiring inside the remote control lever for the trim switch can break or, the contacts on the relays can corrode, and them one or more function stops working. I had that problem with mine and it was caused by water dripping on one of the trim relay terminals, easily fixed by removing the wire and cleaning up the terminals, then coating with marine grease.
Click to expand...

Without knowing a lot more, which requiees asking a lot more question because "newbies" cant relay ALL the info needed is extremely frustrating.


My suggestion is based on real experience with the current trim system overall.

I have seen them lock in the up position when the trailer button is depress to long after drive has reached end of travel.
The up valve "locks" do to over pressure And the pressure needs to be bled off.

I tell EVERYONE, When trimming drive all the way up, as soon as you hear a tone change (meaning its up all the way)
You derpess the trim down for a second or so to releive the pressure....
 
Agreed I have always done exactly that never leave it all the way up. The only problems I have had with the OMC Cobra trim system was a shorted wire inside the control, a corroded terminal on one of the relays and after 36 years I finally had to rebuild the trim cylinders. Lucky for me those end caps came off.
 
louc said:
my suggestion is to get a Mercruiser wiring diagram for your model and look at the section for the trim system. It is not a complicated system, there is the trim switch and its wiring, and 2 relays that are near the trim pump, that use a signal from the trim switch to turn on the high amp circuit controlled by the relay to run the electric portion of the trim pump.
What can happen is that wiring inside the remote control lever for the trim switch can break or, the contacts on the relays can corrode, and them one or more function stops working. I had that problem with mine and it was caused by water dripping on one of the trim relay terminals, easily fixed by removing the wire and cleaning up the terminals, then coating with marine grease.
Click to expand...
I will take all the advice and get back to ya’ll
 
Guys, I had a quick look just now, and it appears the culprit is a relay close to the tilt pump assembly. I will research the part and get a new one. I really appreciate all your help/suggestions.
 
If your trim system uses relays vs solenoids it is a GM type standard 87A relay...if I am not mistaken.
 
OK, I will check on that. If you have a typical solenoid pic for that application at your fingertips, please send, as I am curious now
 
A relay plugs into a multi pin/socket location.
A solenoid has two 14 gauge and two 10 gauge wires connected to it/them. The pump assembly may have two solenoids mounted in a vertical fashion, one below the other.
 
It's unusual, but not unheard of, for the solenoid itself to go bad. I would sooner suspect a dirty or loose connection on those before buying new solenoids. Try cleaning with a small stainless steel wire brush (the kind that look like a toothbrush) all the connections and retighten. If it still balks, yeh get a new solenoid. While you're at it, I highly recommend inspecting the filters inside the reservoir. The reservoir is held on with a long screw up through the bottom.
 
o2batsea said:
It's unusual, but not unheard of, for the solenoid itself to go bad. I would sooner suspect a dirty or loose connection on those before buying new solenoids. Try cleaning with a small stainless steel wire brush (the kind that look like a toothbrush) all the connections and retighten. If it still balks, yeh get a new solenoid. While you're at it, I highly recommend inspecting the filters inside the reservoir. The reservoir is held on with a long screw up through the bottom.
Click to expand...
Thanks, I am still learning and troubleshooting
 
Before anything else he needs to find pump assembly and confirm it matches the image in the link I posted.

once we know he knows whats what, then a method of testing can be offerred.

As of now, he isnt sure what is what.
 
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