Trim/Tilt Motor Issues

[IguanaBait]

I have a 2003 75HP Yamaha Four-Stroke and I am having issues with the trim motor. I finally was able to release the manual trim screw and lift the motor manually to bring it to an easier place to work on. Now my question is what steps can I take to diagnose the issue and decide what needs to be fixed? I attached an image of the trim motor and yes I know its badly rusted. It's been this badly rusted since I've owned the boat but it still worked so I don't know if the rust finally caught up to the motor or not.

[99yam40]

My guess with the way it looks is water has entered the motor through a rusted out outer housing.

Not much we can say as you have not given any details

[boscoe99]

I usually don't diagnose problems based on words and pictures but in your case I would bet that the trim motor is kaput.

[Nautical]

Forgetaboutit..Dump that POS motor and start over..

[IguanaBait]

I figured that I'm going to have to replace the whole trim motor, but I was just hoping that it would be something less expensive. I've also seen from videos on YouTube where guys talked about their trim motors not working because there was no fluid in the mechanism. I would like to try and do this all on my own with fixing the trim motor instead of paying a mechanic so I'm curious how difficult this type of replacement is and also how would I 100% diagnose that it is the trim motor that needs to be replaced before I go out and spend that kind of money.

[boscoe99]

If the motor is not turning then it is either defective or not getting voltage. Now if it is turning then it might be low on fluid.

You add fluid by putting the motor in the full up position. Remove the cap to the fluid reservoir and add as much as it will take. Then trim the motor to the full down position and back up. Remove the cap. Add fluid if needed. Repeat the process until such time as it will take no more fluid.

Now if it is not turning it could be the motor, the switches, wiring, or the relay. To test the motor itself follow the electrical leads from outside back into the cowling to the relay. Remove the blue and green leads from the relay. Apply battery power to the green wire and battery ground to the blue wire. The motor should turn and the motor should trim down. If nothing happens the motor is shot. Or, maybe it just needs new brushes.

To keep costs down, if you need a new motor, try searching at this link:

https://www.google.com/webhp?sourcei...motor&tbm=shop

[IguanaBait]

Thanks for the tips, I'll check it out tomorrow. I also went to check how much a trim motor is from my local yamaha certified dealer and they told me it would cost $725.00. This price seems a little outrageous to me but is this price correct?

[99yam40]

did you look at the link Boscoe99 put up there for after market motors?
Yes Y&Y motors from Yamaha are pricey

[TownsendsFJR1300]

You can either buy the entire unit for a bit cheaper (OEM, $622) on this site;

2003 F75TLRB Yamaha Outboard POWER TRIM TILT ASSY 2 Diagram and Parts

Or pull it apart and replace what parts rotted away/failed. I suspect you'll have a heck of a time getting that unit apart....It wouldn't take much water at all inside to short it out..

It's pretty obvious, with all the rust, water got INSIDE the unit..