Yamaha F150 trim/tilt strange noise

[FrenchFry]

Since I have installed my new Yam F150 engine I noticed some strange noise with the trim/tilt.

This happens when the engine is in the full low position, while tilting it up there is a strange noise with the two small cylinders rams until the main cylinder enters in action, then normal noise, or when the engine is in the full up position standing on the stop lever and retracting the two small cylinders rams, strange noise, then extending them, normal noise.

I have followed the bleeding procedure from the service manual (which despite of tons of useless warnings does not mention that this is an operation that is difficult to perform alone due to the weight of the engine), the trim works well but still the noise remains.

During the procedure I saw some hydraulic leaks on the two small cylinders, strange since the steals have been changed just before I bought it, I don't see this leak in normal operation, normal?

I have noticed in some Yam youtube videos the same noise, is this a normal noise or what? My former Yam trim/tilt did not do this noise.

 

[99yam40]

we have no idea what this strange noise sounds like,
so it would be difficult to say what is causing it

Only strange noise I have read about was the rubbing of the trim rods against the motor while under way and trimming. A little grease on the ends usually helps that

 

[ianyoung77]

Hi FrechFry,
Can you post a link to the youtube videos you refer to?

 

[FrenchFry]

ianyoung77 yes, please see https://www.youtube.com/watch?v=0mOijXtpuOg, same shxtty noise happening on the very same conditions stated above

99yam40 sorry but I don't understand very well "was the rubbing of the trim rods against the motor while under way and trimming. A little grease on the ends usually helps that", could you please detail a little bit more (for those whose first language is not english)?

 

[ianyoung77]

Hi FrenchFry,
I can't hear anything particularly strange in that video. The trim rods make a sort of knocking noise. If you look at the attached youtube at around the 2 minute mark he lubricates the rods.

 

[FrenchFry]

Hi,

Thanks but sorry I don't get it: how can the lubrification of the rods eliminate the knocking noise? I tried it (without a lot of conviction) and the noise is still there, apparently it's something like a normal noise but I don't remember hearing this with my previous engine.

 

[99yam40]

In the video right at the 1st it sounds like air in the system.
I was talking about putting a little grease on the end of the trim rods so when they ride against the motor bracket to push the motor up that contact area will be lubricated

 

[FrenchFry]

How to remove the air?

I have followed the service manual procedure which is:

- open the manual valve
- trim up and down the engine 4 or five times
- close the manual valve
- take a smoke while the fluid settles
- tilt up the engine and put the stop lever
- open the reservoir cap and refill if necessary (ie if the fluid does not overflow)
- repeat the procedure until the fluid is a the correct level

 

[99yam40]

Might want to move the motor up and down manually instead of using the power T&T motor, as that just foams up the air/fluid in the system

 

[FrenchFry]

Yes, that's exactly what I did, step 2 "trim up and down the engine 4 or five times" was done manually (and it's quite difficult to do this alone)

Your trim does not do this noise? The worse is when the engine is up with the stop lever, retracting the trim rods makes this noise, then extracting them, normal noise.

 

[99yam40]

My little C40 only has the one tilt cylinder that does both the T&T functions, and it does not make that noise

 

[tommarvin]

Something is wrong with the trim rams, there is a loud grinding sound when they start up.

We have a force 125 and when there's a problem with the T&T we change two rubber washers in the pump, fixs 90% of the problems.

You did the air in the line fix didn't work, your trim should be almost silent,.

Tear the pump apart first search for the problem, washes? If you don't see or fix anything,tear the trim ram apart search for the problem,it's going to get worse,and cost a lot of money and time to fix later .

 

[FrenchFry]

Could you please identify the "two rubber washers" in http://www.boats.net/parts/search/Y...r/F150AET1X/POWER TRIM TILT ASSY 2/parts.html or http://www.boats.net/parts/search/Y...r/F150AET1X/POWER TRIM TILT ASSY 1/parts.html ?

What causes this noise from your standpoint, the pump or the rams?

From the invoices I have I can see that the previous owner had this trim repaired 4 or 5 times (almost every year!), seals on the trim rams have been changed in April 2015 and the motor was not used in the meantime...

While doing the bleeding procedure I saw some small oil leak on the trim rams...

I have two other trims from the previous engine (one almost new) and was thinking to replace the current trim but of course Yamaha has decided to invert the place of the manual valve.

 

[FrenchFry]

The two links are boats net

 

[99yam40]

you are not allowed to post links to other part sites that is why they are messed up

And I am sure Tom does not know anything about your Yamaha

 

[FrenchFry]

Ah, sorry, what should I do then? I am ready to take the trim out and check everything but a bit afraid that it remains the same at the end.

 

[tommarvin]

FrenchFry, I was using my force 150 as an example, your problem could be very close to the same fix as ours tear the pump apart and change some rubber washers or seals.

I'm not there, put your finger on the pump and the rams run it up and down you tell me if it's the pump or trim ram or tilt ram.

Find where the grinding noise is coming from tear it apart, carefully check everything,may have to order parts, and fix it. You got this!

 

[tommarvin]

www.boatinfo.no/lib/library.html

 

[FrenchFry]

Problem "half" solved...

I have removed the trim, then the pump (noise seemed to come from the pump), cleaned everything (it did not look very dirty), changed the o-rings, changed the brushes, reassembled the pump, tested it, looked better but still a slight noise.

Then I removed all the fluid since it was looking a bit milky, to do this I unscrewed the manual valve, put the rams fully inside and emptied the fluid by the reservoir, I suppose this did remove quasi all the fluid inside, refilled, removed the air, the noise seemed to be gone.

I put the trim back, got lunch, and coming back the noise was here again... less than before, strangely it happens now only with one of the two rams.

The level of fluid is OK but I am wondering if what goes out from the reservoir when I check this is not still milky.

So right now the conclusion might be that this is a "normal" noise (but then why did it partially disappear?) or that water in the fluid is causing it.

What do you think? Difficult to do more than I did, the noise looks somewhere similar to the noise that tells you to stop when you fully extend the trim up.

 

[tommarvin]

Good for you, On our T&T only one of the two rams is hydraulic and the other ram is called a shock absorber or stabilizer something like that,it has a ram but no hydraulics I think you fixed it if you don't hear bad noise like metal to metal like before.
Keep topping up the fluid when the rams are all the way in, so you don't overfill..