1977 75hp evinrude trim problem

[touch107fm]

Hi guys

Will working on my boat I have just realize we have another issue with the motor / trim unit.

It will not go down, when I click the switch to go down it just clicks.

Its a three wire trim motor, Its wires like this:



Now I have tried various tests.

When I hook the trim directly to the battery it will go up and down no problem.

Next I tried a different switch and had the same result. I swapped the up wire with the down wire on the solenoid and the result was now the up would not work.

I went to a marine wreckers to get a solenoid and they tested mine and said it was OK.

Do solenoids go bad.

Any ideas on what could be wrong.

Cheers,
Darragh

 

[Joe Reeves]

Re: 1977 75hp evinrude trim problem

The solenoid is ONLY for the UP mode.

In the down mode, voltage is supplied from the tilt switch directly to the electric motor.

Your problem is that somewhere along the line, voltage is not being supplied from the tilt switch to the tilt electric motor... corroded or broken wire, OR loose wire terminal ends, OR tight but dirty wire terminal ends.

 

[steelespike]

Re: 1977 75hp evinrude trim problem

delete

 

[boobie]

Re: 1977 75hp evinrude trim problem

Agree with Joe +1......

 

[touch107fm]

Re: 1977 75hp evinrude trim problem

OK so I know the solenoid is for the up movement now (cheers).

I just spent the last hour cleaning and filing the contacts, I replaced two of the contacts.

Its still the same. To confirm when I connect the trim direct to the battery it will go both up and down no problem.

Its just when I press the down switch all I get is a click from the solenoid.. Up works fines.

Any ideas. Could the solenoid be faulty?

 

[racerone]

Re: 1977 75hp evinrude trim problem

The solenoid is not used for down !-------------Pull the wires off the switch and touch them together and see if it works for down.

 

[touch107fm]

Re: 1977 75hp evinrude trim problem

Down works but the up didnt. It just clicks when I touched the wires for the up.

Is it possible the solenoid is faulty?

 

[Joe Reeves]

Re: 1977 75hp evinrude trim problem

You have the unit wired wrong..... The solenoid SHOULD NOT click in the DOWN mode!

The solenoid is to be wired ONLY in the UP mode!

Check and rewire it as per my wiring diagram which you obviously have.

 

[racerone]

Re: 1977 75hp evinrude trim problem

When I read post #5 it says that DOWN does not work !!----Please check your information before you post it.

 

[touch107fm]

Re: 1977 75hp evinrude trim problem

I have been going over it this morning and it looks like one of the bushes on the trim motor is damaged and one of the cables looks like it was in a bad way inside the trim motor.

Are the bushes easy to get hold off.

Cheers for your help guys.

 

[boobie]

Re: 1977 75hp evinrude trim problem

You said in post #5 it worked both ways when connected directly to a battery. This post is making no sense to me!!!

 

[Joe Reeves]

Re: 1977 75hp evinrude trim problem

You said in post #5 it worked both ways when connected directly to a battery. This post is making no sense to me!!!

Boobie.... I understood that to insinuate that he had hooked up the battery directly to the electric motor, testing the motor. He seems to have a problem of sorts explaining himself fully. It happens.

 

[boobie]

Re: 1977 75hp evinrude trim problem

Yeah Joe, I know sometimes my patience gets a little thin.

 

[Joe Reeves]

Re: 1977 75hp evinrude trim problem

Yeah Joe, I know sometimes my patience gets a little thin.

I have that problem at times also. Now I see that apparently there is a problem with the brushes or some wire inside the electric motor? I think I'll just sit back and watch awhile now... can't think of anything else to add.

 

[touch107fm]

Re: 1977 75hp evinrude trim problem

Guys while I appropriate your help I don't understand why you are now making a joke out of me!! really no need for it at all.

I came here for some assistance not for negative posts above.

Yes my posts maybe all over the place but its due to the fact I don't fully understand the system. I am sure you guys were not born with the boating wisdom you know.

If you don't have anything positive to say then please don't post on this thread.

Cheers,
Darragh

 

[Joe Reeves]

Re: 1977 75hp evinrude trim problem

Guys while I apprreciate your help I don't understand why you are now making a joke out of me!! really no need for it at all.Darragh

Darragh.... No one is making a joke of your problem. Rather we have taken the time to fully explained the correct trouble shooting procedure of your problem and the cure to it. If the electric motor functions when you connect a battery directly to it as you've stated above, then it is obviously performing properly and there is no reason to be dismantling it. The problem is, as I have stated above in not so many words... someone has wired the unit improperly whereas when you toggle the "down" position, you are apparently throwing voltage to the "up" mode solenoid... you do say that the solenoid clicks in the down mode.

We have said everything that can be said in a positive manner in the above replies and I have no idea what could possibly be further said except to repeat ourselves, hence my remark that I will sit back and watch awhile... that is meaning to see what other members might have to say and add to what already has been suggested.

If my mention of losing my patience at times upset you... my apologies. However it does happen at times when working on my truck (bolt heads rounded off, etc), cutting the grass (mower carburetor flooding), neighbors dogs (peeing on my bushes), and other matters.. (it happens).

Suggesting that neither of us has had anything positive to say is confusing. Carefully re-read over what we've had to say... perhaps you've misread some bit of advice.

 

[boobie]

Re: 1977 75hp evinrude trim problem

Move over Joe, I'll be sitting along side of you.

 

[touch107fm]

Re: 1977 75hp evinrude trim problem

Back to my trim unit.

Its a 1977 75hp evinrude.

Here is the trim unit:

I opened up the trim motor to see the stat of it and the contacts of both wires to the top of the unit were barely held on.



Q: Where can you get the brushes from.
Q: How hard is it to put back together>
Q: Is it possible to just replace the motor from the trim (same part as the above picture)

Cheers,
Darragh

 

[boobie]

Re: 1977 75hp evinrude trim problem

Edit... Lack of communication.....

 

[Joe Reeves]

Re: 1977 75hp evinrude trim problem

Back to my trim unit. View attachment 221157

Q: Where can you get the brushes from.
Q: How hard is it to put back together>
Q: Is it possible to just replace the motor from the trim (same part as the above picture)

Cheers, Darragh

I can't say that I have any further advice to offer BUT as far as installing brushes... simply keep them retained in place by twisting a piece of fine wire to hold them back against their springs, then after they're firmly in a position to contact the armature commutator, cut the wire(s) and remove it/them.

I can only see one brush properly which looks as good as new. If the other brush is as good, it's unlikely you need to replace them. However, for your reference....................

You will need two (2) gaskets, part number 122790, approximately 5.00ea.

You may need one (1) brush set, part number 172854, approximately $20.00 for the set (2 brushes)

These items look to be still available in Bombardiers price book. Check for the part numbers on this site first, then at your local dealerships, eBay, marine stores, etc.