Need help on how to change the tilt trim on a 2001 yamaha 90hp

Wakullaangler

Recruit
Joined
Dec 7, 2007
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2
My tilt-trim motor is out and I am seeking info on how to change it out. Do I need to take the engine off, or is it possible to do without that. R. Houghton
 

AGENT 37

Petty Officer 1st Class
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Mar 2, 2007
Messages
319
Re: Need help on how to change the tilt trim on a 2001 yamaha 90hp

The actual motor should be secured to the base with 3 allen head screws. The stator cover for the electric motor is secured with the three phillips head screws one step up from the allens. If you take the cover off you can check/repalce the brushes and clean up the commutator (core), if you don't want to spend the $300 to repalce it, but it can be a pain to get the motor back together. Drain the hydraulic fluid first and replace the o-ring. This should all be possible with the motor manually raised up. You shouldn't have to remove the whole unit to replace the motor. Use ratchets and extensions to your advantage. I just got done overhauling a motor and repainting the case.
 

AGENT 37

Petty Officer 1st Class
Joined
Mar 2, 2007
Messages
319
Re: Need help on how to change the tilt trim on a 2001 yamaha 90hp

And be sure that it is not the trim relay or switch. I've seen those go out more than the motor. In fact the only motor that I can recall needing replaced was one that I vented on by beating the crap out of with a big hammer...... and that kids why the motor went bad.
 

grid

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Joined
Oct 29, 2002
Messages
232
Re: Need help on how to change the tilt trim on a 2001 yamaha 90hp

Good point. Have you ever noticed that Mercury, and some Yamahas, have "DO NOT HIT WITH HARD OBJECT" painted on their starters? Makes me think the ownership frustration quotient (FQ) is high.

Can you hear the solenoids click for UP and DOWN? Follow the lead from the tilt motor to the solenoids. A GREEN and a BLUE are each attached to a solenoid. Remove the leads (you'll have to to check, or replace). Hook a 12v + to either wire, and a ground to the other. If the motor's okay, it'll work. Positive to BLUE tilts the engine UP, and positive to GREEN tilts it down. POsitive to one, negative to the other... If the unit is seized, or otherwise dead, the tilt motor will not function, but that's the only way to identify the problem area. If you're in a salt water area, apply some heat to the areas under the Allen heads, if you have to replace the motor. The whole job can "go South" in a hurry if you break one of those mommas.
 
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