94-5 70hp force trim problems

[jovercas]

So I have a problem with my trim system. It`s serial # oe040137, not sure what yr this makes it? The motor will not trim up or down. I took my boat to a boat service store and they told me the trim motor was dead and had to be replaced. However, they said they cannot order a part for it bc force is no longer made. They say they could get an assembly(with hydraulic?) for over $800 and replace it. I ordered an Arco 6276 tilt/trim motor repair kit and took it by. They said it would not work and I need a trim pump motor, what I ordered was reservoir only. Is there a pump to fit this assembly? If so, would this work to fix my problem? Feel free to dumb it down for the non-motor savvy. Thanks!

 

[roscoe]

Re: 94-5 70hp force trim problems

Hard to tell as Mercury mixed up their serial numbers from 1991-1993.

What you bought was a motor and reservoir.
It attaches to the pump base unit.

Before doing anything else, lets try to determine what is wrong with yours.

What happens when you try to tilt up or down?

Do you hear any clicking under the hood of the motor?
You should, that would be the electrical relay sending power to the trim motor.
If the relays are not working, the trim motor will not work.

Does your trim motor make any noises at all?

Have you checked the fluid level in the reservoir?

Now you need to test the trim motor.

Disconnect the 2 wires where they attach to the outboard wiring harness.
One blue, one green.

Hold the wires directly to the terminals on your battery, one to each terminal.
Yes it will spark when it makes initial contact.
The motor should run.
Next, swap the two wires around.
The motor should run now too.


If the relays are not working, the problem is in the wiring.

If the motor won't run, the problem is the motor.

If the motor runs, but the pump does not lift the motor, the pump is likely shot.
Or possibly the driveshaft between the motor and the pump is damaged.

I'm no expert with these, but this should help determine the problem.

Test it out, then post the results back here and we will see what we can do for you.

 

[jovercas]

Re: 94-5 70hp force trim problems

That's awesome. Thanks for the quick reply. My boat is currently at the shop as they are working on the trailer, but as soon as I get it back I will test that as above and let you know what happens. Thank

 

[RRitt]

Re: 94-5 70hp force trim problems

everything roscoe said.

plus - the arco you bought should fit your trim system. the motor should have come with a little bag of driveshafts and you use the one that fits. your original motor was probably the tall skinny one. the short fat one does not look like a replacement but it does fit and works perfectly.

 

[hundee r1]

Re: 94-5 70hp force trim problems

If I may, ever since Ive had my force, the tilt / trim has been temperamental. Especially if I haven't used the boat for a while, I have to toggle between up and down quickly to get it to move. Sometimes it will only go up, sometimes only down.After a while of messing with it, it starts working good. usually only th efirt operation for the day, then throughout the day it works better.

Thought it was a dodgy switch at the controls, but today whilst it was playing up , I was at the motor and could here the relay's clicking.

Sounds like I have to pull the wires and check it out yeh?

Will, add, with the help from Ritt a year or so ago, I rebuilt the hydraulics and they work fine, it just seems the triggering of the system is suspect. The pump/motor is aftermarket.

 

[jovercas]

Re: 94-5 70hp force trim problems

Ok finally got my boat back and was able to try these things out.

When I try to tilt up and down its jerky at first and then started working fine. (Trying the method hundee mentioned velow) However, once I stepped away and came right back it did nothing. It did click under the hood of the engine when I toggled between tilt up/down, but the engine would barely move, if at all. After holding it down it moved just a smidge, then wouldn't move at all again.

I could not notice the trim motor making any noise at all, that's not to say it didn't bc I couldn't get right beside it to hear well. Would it have been as noticeable audible as the clicking under the hood?

I did not check the fluid level in the reservoir. To do this do I simply unscrew the fill plug? And it has to be trimmed up. Which is a problem consider its all the way down now and I cant move it. How much should be in the resevoir? What kind of fluid would I need to put in it and how much?

I saw the 2 wires you were talking about, but did not know where you meant to disconnect them. Do I disconnect them from the part closer to the engine, or at the trim motor?

When testing the wires, just use them on any battery, do I need to unhook the engine from the main battery?

So what do you think?

 

[hundee r1]

Re: 94-5 70hp force trim problems

I simply disconnected mine at the motor, then run some simple wires directly to a good battery. I was able to drive my motor and thus the hydraulics successfuly, swap the wires the other way around drives the motor the other way.

All my wiring looked fine so I swapped the 2 relays around. All of a sudden my temperamental movement was in the other direction.
Replaced both relays just to be sure, works perfect now!!

 

[roscoe]

Re: 94-5 70hp force trim problems

Ok finally got my boat back and was able to try these things out.

When I try to tilt up and down its jerky at first and then started working fine. (Trying the method hundee mentioned velow) However, once I stepped away and came right back it did nothing. It did click under the hood of the engine when I toggled between tilt up/down, but the engine would barely move, if at all. After holding it down it moved just a smidge, then wouldn't move at all again.

I could not notice the trim motor making any noise at all, that's not to say it didn't bc I couldn't get right beside it to hear well. Would it have been as noticeable audible as the clicking under the hood?

I did not check the fluid level in the reservoir. To do this do I simply unscrew the fill plug? And it has to be trimmed up. Which is a problem consider its all the way down now and I cant move it. How much should be in the resevoir? What kind of fluid would I need to put in it and how much?

I saw the 2 wires you were talking about, but did not know where you meant to disconnect them. Do I disconnect them from the part closer to the engine, or at the trim motor?

When testing the wires, just use them on any battery, do I need to unhook the engine from the main battery?

So what do you think?

Sorry, lost track of this thread.

Have it fixed yet?

Your force 70 hp is a bit odd. It must be in the DOWN position to open the fluid reservoir.
Remove the cap.
If the fluid looks like motor oil, then use 30W non detergent oil.
If it looks like hydraulic fluid, use tilt and trim fluid.

You can disconnect the motor wires where ever it is convenient, like at the bullet connector, or the relays.

Motor should make a noticeable whining sound when it runs.

You can use any 12v battery you have handy, lawnmower battery or spare car battery you may have available.

 

[jovercas]

Re: 94-5 70hp force trim problems

Hey guys thanks for the help. I tried hooking it up to the 12v battery and nothing happened so I assumed trim motor as you said. Luckily I had already purchased the arco. So I decided to open up the motor. The guy who had it before me had spliced the wires out of the trim motor visibly and once taking the motor out it was also spliced at the bottom going into the motor. The motor was sitting in the oil as well and noticably corroded. I replaced the trim motor and reservoir and filled the reservoir with 30 non detergent and its working better than ever before. And for only around 200 for the part it was a lot cheaper than the "crap boat company" had quoted me over 800 just for the parts, not mentioning whatever labor charges would've been. Thank you guys so much for the help, you are awesome.

 

[roscoe]

Re: 94-5 70hp force trim problems

Good to hear, happy boating.