Yamaha P150TLRX Tilt Trim Stuck

[The Smoker King]

I have a problem that I have never encountered before.

1. The tilt/trim on my motor got sluggish.

2. I attempted to add fluid by the required process.

3. This made it worse. Now, the motor runs but the unit will not tilt or trim. The main, center ram will not come up more than 1/4 of the way from the down position. I used a winch in my shop to try to lift the motor manually, and it will come up 1/4 of the way then it just stops. This is with the manual release screw wide open too.

4. I want to take the unit off to rebuild, but I can not get to the top pin.

What should I do?

 

[The Smoker King]

Re: Yamaha P150TLRX Tilt Trim Stuck

Guys, I know this is a hard one, but I have had some great help from this forum before.

I have tried just about everything I know to get it freed up, but I am stuck on this one.

 

[99yam40]

Re: Yamaha P150TLRX Tilt Trim Stuck

How can anyone help if you will not tell us what is stopping it from moving.
Could it be the tilt tube froze up?

Pull the motor off the transom and unbolt the t&t unit from the bracket if you think it is the t&t unit that is froze up.

 

[The Smoker King]

Re: Yamaha P150TLRX Tilt Trim Stuck

"How can anyone help if you will not tell us what is stopping it from moving.
Could it be the tilt tube froze up?"

That is why I posted here; to see if anyone had any ideas on what is stopping it from moving.

The tilt tube is not frozen. It will move from the down position to about 1/3 of the way up by me picking up the motor by hand. Once the motor reaches 1/3 of the way up, it stops.

I can unbolt it, but would that do many any good? I don't see any bolts, but I do see two pins holding the tilt/trim assembly on. One at the bottom of the assembly and one at the top of the main cylinder.

Since the motor will not tilt up past 1/3 of the way, I can not get to the top pin to knock it out.

 

[The Smoker King]

Re: Yamaha P150TLRX Tilt Trim Stuck

If I pull the motor off, and the main cylinder is stuck, will there be any point in taking the motor off?

 

[99yam40]

Re: Yamaha P150TLRX Tilt Trim Stuck

Just looked at parts breakdown of that unit and you are correct the T&T unit is not bolted to the motor brackets as I thought it was.

I am at a loss as to where to go from here also. May need to take to local Yamaha shop.

 

[The Smoker King]

Re: Yamaha P150TLRX Tilt Trim Stuck

Thank you for checking it out!

I will probably have to.

I am mechanically minded, and used to be a diesel mechanic, but this one blows my mind. I have never seen a hydraulic cylinder move about 1/4 of the way then lock up, especially when a relief valve is open.

 

[RRitt]

Re: Yamaha P150TLRX Tilt Trim Stuck

a hydraulic or electrical break in a trim system will not cause an engine to freeze in place. That requires a mechanical break. So try lifting the engine angle with your hoist while also running the tilt up. If it is a failure in the TnT system then the engine will most likely lift. If it does not lift then it is possible that your manual release has broken causing the TnT to have no bypass (double check you manual bypass at a lower angle). Otherwise you are looking for a mechanical break. The chances of your tilt ram having an internal break that could lock engine are slim to none. Personally, I think you're engines is probably jammed and the tnt system isn't strong enough to snap or bend the offending part.

 

[The Smoker King]

Re: Yamaha P150TLRX Tilt Trim Stuck

I have hooked the hoist up and run the tilt and trim at the same time, but I can only move it from the extreme down position to 1/3 of the way up. It moves freely to that point, the stops.

The hole problem started when the system starting getting sluggish to tilt and trim. I tried to add fluid, and it just got worse.

The motor runs, but it sounds like it is cavitating.

 

[RRitt]

Re: Yamaha P150TLRX Tilt Trim Stuck

maybe the tilt and trim got sluggish because the engine was stuck? maybe adding fluid just gave TnT the ability to bend the broken part even more?

That would be my first guess.

 

[The Smoker King]

Re: Yamaha P150TLRX Tilt Trim Stuck

I appreciate your help.

What part would break? There is not broken part as far as I can see. The way it acted was exactly like a hydraulic system low on fluid. It would go down, but it took a bit to get it to go up. Nothing popped or broke, but I had a hard time getting fluid in the system, and I think more came out than went in.

Is there a place on mount that could come under pressure and break? I do not see anything or anyplace that could bind.

 

[99yam40]

Re: Yamaha P150TLRX Tilt Trim Stuck

can you hear fluid and/or air moving through the manual release valve when you lifted motor manually for the first little bit it would move?
Did it lock into place when you closed the manual release valve? or did it just fall back down? Just trying to make sure the release valve if doing it's job and you are not turning in wrong direction.

To fill fluid you have to have the motor tilted all the way up and locked into place and then pull fill plug and add fluid. So I am not sure if you have fluid enough for it to function properly if you tried it a different way. If you have to add fluid the there must be a leak.
like I said before if you can not make it go all the way up take it to the experts and see what they have to say

 

[The Smoker King]

Re: Yamaha P150TLRX Tilt Trim Stuck

There is no sound of fluid moving, it sounds like it is running dry. It won't even move a millimeter when the tilt/trim button is depressed. I can pick the motor up 1/3 of the way before it stops with the relief valve open or closed.

 

[99yam40]

Re: Yamaha P150TLRX Tilt Trim Stuck

In your 1st post you said " I attempted to add fluid by the required process"
Did you have the motor tilted all the way up and locked into place?

On another you said more fluid came out than went back in, so I am thinking it is too low to operate and your manual release valve is not opening properly.
You are just able to move the motor and compress the air in the system but not the fluid

I do not know how you would pull that or check maybe someone else can help.

 

[RRitt]

Re: Yamaha P150TLRX Tilt Trim Stuck

ok - a trim system has three valves that will affect its ability to go up and down. A check valve in each direction prevents fluid from escaping when the motor is nor operating. A manual release valve that opens a gate between the up and down circuits so that fluid all internal pressures revert to zero.

1). If you open the manual release and the engine does not move then either the manual release is broken or the engine is stuck somewhere else.

2). If you run a trim motor then it will activate a shuttle mechanism that releases the check valve and lets the backside fluid escape. Hence, if you run the trim motor "up" then you should be able to manually lift the engine because the check valve is open. If you were low on fluid then you would be able to run/lift a bit and then squirt in some more fluid - run/lift-squirt ... run/lift-squirt.

You say that you have done both of the above. The only conclusion left is an extremely fubar pump that can not even do a manual release and is no longer capable of opening a check valve. Either that or the engine is stuck somewhere else.

 

[The Smoker King]

Re: Yamaha P150TLRX Tilt Trim Stuck

In your 1st post you said " I attempted to add fluid by the required process"
Did you have the motor tilted all the way up and locked into place?

On another you said more fluid came out than went back in, so I am thinking it is too low to operate and your manual release valve is not opening properly.
You are just able to move the motor and compress the air in the system but not the fluid

I do not know how you would pull that or check maybe someone else can help.

Yes. It is like I can pick the motor up easily, then it stops at 1/3 of the way up. I think too that the air is getting compressed and stopping the motion of picking the motor up.

 

[The Smoker King]

Re: Yamaha P150TLRX Tilt Trim Stuck

RRitt

"The only conclusion left is an extremely fubar pump that can not even do a manual release and is no longer capable of opening a check valve. "

I agree. I may try to pick the motor up as far as I can, secure it, and try to take the snap ring off of the manual release valve and remove the valve to see what that gets me.

I thought about forcing fluid into the the system while having someone else hold the up button down. I have not tried this yet. I can lift the motor just high enough to unscrew the filler cap and stick a hose from my tilt/trim fluid bottle into the hole.

WOrth a shot I guess.