Trim Function for Yamaha 90 Four Stroke

[Mark R.]

We have a 2012 Yamaha F90TLR that we purchased in 2021.
The outboard trim feature has never worked since we got it.
It's on a small (20 foot) Premier pontoon boat, so it hasn't been a huge issue.
But I'd really like to get it repaired and functional again this winter.
I can hear the relay click when I press the button in both up and down directions.
And it's the same from either the helm switch or the rocker switch on the outboard.
So it seems like the switches and relays are sending the proper electrical signal.
I jumpered 12V directly to the trim motor and it does nothing in either direction.
So my questions are:
Is there anything more I should check? Would you agree I need a new trim motor?
Where is the best place to order a new one? And any tricks to swapping it out?

 

[99yam40]

how did you jump the T&T motor?
you need to provide both + and - for the motor to run

 

[Mark R.]

how did you jump the T&T motor?
you need to provide both + and - for the motor to run

Yes. I used two leads straight from the battery.
And I remember trying the polarity both ways as well.
No motor movement with either orientation...

 

[99yam40]

Yes. I used two leads straight from the battery.
And I remember trying the polarity both ways as well.
No motor movement with either orientation...

did you remove the motor wires from the T&T relay and then jump those to a battery?

if so yes that motor is bad.

look up you motors T&T motor part number and then do a web search to find lots of places to buy them, and also some aftermarket ones

 

[Mark R.]

did you remove the motor wires from the T&T relay and then jump those to a battery?

if so yes that motor is bad.

look up you motors T&T motor part number and then do a web search to find lots of places to buy them, and also some aftermarket ones

Yes. That is how I did it, and that was my conclusion as well.
I will remove and replace the motor this winter. Thanks!

 

[flyingscott]

Why is this motor not under warranty?

 

[Mark R.]

Why is this motor not under warranty?

Warranty? Wow, I hadn't even thought of that.
It's right at ten years old. We're the second owners.
Could it possibly still be covered..?!?

 

[flyingscott]

Warranty? Wow, I hadn't even thought of that.
It's right at ten years old. We're the second owners.
Could it possibly still be covered..?!?

I am sorry I read that at 2021. Do you have a manual for your motor? How many relays are on it for the T/N/T.

 

[boscoe99]

One relay assembly on that model.

 

[99yam40]

I am sorry I read that at 2021. Do you have a manual for your motor? How many relays are on it for the T/N/T.

what does this have to do with the motor that will not turn when jumped directly to the battery?

 

[flyingscott]

what does this have to do with the motor that will not turn when jumped directly to the battery?

Bad ground? Did he just jump wire to wire? Did he ground it? Was it a good ground?

 

[99yam40]

Bad ground

so a bad ground would still affect the motor when both leads are jumped straight to the battery?
how does that happen

 

[flyingscott]

what does this have to do with the motor that will not turn when jumped directly to the bbat

so a bad ground would still affect the motor when both leads are jumped straight to the battery?
how does that hap

How do you know it was a good ground? The relay clicks but the motor doesn't even try to turn? Are you there next to him if so I apologize. I just know most electrical issues can be caused by a bad ground. As far as hooking up jumper cables was it done correctly? Just a suggestion for him to look at. If you don't agree ,tough

 

[99yam40]

How do you know it was a good ground? The relay clicks but the motor doesn't even try to turn? Are you there next to him if so I apologize. I just know most electrical issues can be caused by a bad ground. As far as hooking up jumper cables was it done correctly? Just a suggestion for him to look at. If you don't agree ,tough

I asked if he took the motor wires off the relay and put directly on the battery, and he said he did.
did you read what was written in the thread before responding to it?

 

[Mark R.]

I used two heavy leads, straight from the two battery terminals.
I connected those two leads to the two wires coming off the motor.
And I tried it with both polarity combinations (switching the + and -).
I assumed that should make the motor spin in different directions.
But the motor didn't move at all with either connection.
I'll try it again on the bench to confirm, once I get it off.

 

[flyingscott]

I asked if he took the motor wires off the relay and put directly on the battery, and he said he did.
did you read what was written in the thread before responding to it?

Sorry I like to do the proper test before loading the parts cannon. But to each their own

 

[99yam40]

Sorry I like to do the proper test before loading the parts cannon. But to each their own

you do not even know how many relays this T&T system has ,
so you ask that question after he has tried running the T&T motor directly to the battery.
And checking grounds too when the wires are tried directly to a battery
maybe you should be looking up and reading some before throwing stuff out there that would do nothing to help him

 

[boscoe99]

If you have disconnected the PTT pump motor power feed wires at the relay, and applied battery power to the leads, and the pump motor does not run, that is a pretty darn good indication that it is the pump motor that is at fault.

 

[flyingscott]

If you have disconnected the PTT pump motor power feed wires at the relay, and applied battery power to the leads, and the pump motor does not run, that is a pretty darn indication that it is the pump motor that is at fault.

If you have a bad brush or broken wire how does your test find that? I guess it is just simpler to throw a new motor on. A brush or broken wire is significantly cheaper to fix than replacing the motor. DC motors can be tested but I guess why bother!!!

 

[Mark R.]

If you have a bad brush or broken wire how does your test find that? I guess it is just simpler to throw a new motor on. A brush or broken wire is significantly cheaper to fix than replacing the motor. DC motors can be tested but I guess why bother!!!

I do plan to play around with it on the bench once I get it removed.
Honestly, though, it looks like the motors are not killer expensive.
The boat is up on a lift at my dock, but I can't quite reach the motor.
So I'm gonna need to pull it from the water in order to get it removed.
I'm not sure how much confidence I would have in my repair effort.
It might be more prudent to just go with a new motor. We'll see...