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Trim and Tilt 40Hp XWT 2016 models, consecutive serial numbers.

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popsleigh

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The motors will not trim up when under load. Are perfect when not under load. Tearing my hair out. My bow is too low in the water and clearly not efficient. I have had this issue since I acquired the boat.

Seals Replaced
Fluid topped up and bled.
Both motors trim and tilt in both directions.
Both motors exhibit identical symptoms.

One online poster mentioned that these motors are Trim and Tilt and NOT Power Trim and Tilt. Only meant for adjusting trim at no wake speeds. My manual clearly refers to PTT. Can anyone throw any light on this.

Thought it could be a Trim and Tilt sensor, but I cannot find one for my model in the workshop manual. According to AI the motors do have hall effect sensors that can be problematic. Now to locate them?

The fact that both units have identical symptoms leads me to believe that it is either a setting to both as the chances of identical failure is rtaher remote I would have thought.
 
In what country are you located? A 40XWT was not distributed here in the US. What is the complete engine ID?
 
Morning, I am located in South Africa so it would be a motor destined for Europe I would have thought.

https://imgur.com/OycNqvu

It is a 2 cylinder, 40hp, with both electric and pull start and they claim Power Trim and Tilt.

On the PTT I note that there is only one hydraulic cylinder that is permanently connected. The rams that one sees that come from the bottom pushing up are absent. Are those not the "power" rams? Here is a page from the service manual. This is what the PTT looks like.

https://imgur.com/VPgRkJD
 
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Spoke with a Yamaha agent yesterday a.m. He says that the integrated ram has an area deemed to be the trim part. He surmises that the transom angle is too great and that the trim reaches full extension and moves into the tilt part and then does not have sufficient power to overcome the water resistance. I can understand what he is saying and it does make sense. He suggests fitting wedge spacers to set the motors out a little such that the props are further away from the transom.

My RIB and motor combination is very common here and I can't believe they would have made such a fundamental error.

I have approached the manufacturer via email for clarity on the matter, but they have probably closed for the Holiday season. In this country the retail industry continues to trade but industry pretty much closes down from mid-December to Mid-January (builders break). I do not expect any response soon.

Going around in circles but I think getting closer to the truth.
 
As near as I can tell that is a single cylinder power trim and tilt model. As opposed to those units that have a single tilt rod and two trim rods.

You should be able to trim the motor up while under way but only to a limited degree.

Here is a photo of a US 40 HP two stroke model that shows the trim range. But this is for a three cylinder model. Same trim unit is used in both models I believe.

 
boscoe said:
Do you have a link to a Yamaha parts catalog for your model motor?
Click to expand...
www.slideshare.net

YAMAHA OUTBOARD 40XWT Service Repair Manual L: 450101-

This service manual provides instructions for maintaining and servicing Husqvarna chainsaws models 40X and E40X. The manual is written in multiple languages, including English, French, German, and Spanish, to accommodate an international customer base. It contains detailed technical information...
www.slideshare.net www.slideshare.net
 
That is for a 1997 model year motor. I thought you said yours was 2016?

And I was looking for the parts catalog. So I could compare part numbers to US trim and tilt assemblies.
 
boscoe said:
That is for a 1997 model year motor. I thought you said yours was 2016?

And I was looking for the parts catalog. So I could compare part numbers to US trim and tilt assemblies.
Click to expand...
Apologies for the late response had my three grandbuddies here for 10 days and they consumed all my waking hours. Get them but once a year.

The date was my bad. That should have been 2006. The motors were manufactured in 2005 but registered as 2006 when sold with the boat.

My outboards are identical to those shown in the manual. I have attached three pages from the Parts Manual of the Model 66TK 2010 model, it looks like this model was unchanged for 10 odd years.

Many thanks for your assistance.
 

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Thank you, I agree.

So now the only thing unattended to is the electric pump motors.

Many thanks for the time you devoted to this post.
 
Finally got to the bottom of this. First the data.

The transom has a 15° angle.
The motor specs state a trim angle range of -4° in to 20° out.

So before we start, the transom angle has consumed 15° of my 20° trim. The motor will NEVER trim up. Poor matching of the outboards to the transom / excessive transom angle. The only solution is to;

a) Fit trim and tilt pins, defeating the purpose the PTT.

b) Fit spacer wedges, at this point thinking of 5° out. See the vectors below.

Trim.jpg
 

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Just by the way, this may also explain away why, when fully trimmed into the transom the motors were stalling. The outboards fully trimmed in are -19° off center. I think this was affecting the float level / fuel delivery / possible flooding?
 
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