trim gauge problem

[frothy top]

When i turn the eletrics on the needle goes up to the top, but when i trim the outboard up or down the needle does not move up or down.
does any one know how i can solve this

Thanks

[Hightower]

On a Yam 40?

They are prone to having the sensor seize up I belive. See if you can locate it on the transom and have a look.

[frothy top]

How do i know when i have found this sensor?
sorry im not the sharpest tool in the box.

[Hightower]

I think the sensor is attatched to the saddle with a plastic arm comming out one side. This arm should move freely (within it's range) when the outboard is compleatly trimmed up and as the engine trims down acts on this arm providing the signal for the gauge. I'm talking Yam 80 here, but I think they're all the same.

[frothy top]

Thank you very much i will give that a go tomorow.

[frothy top]

I found the sensor i pushed it with my finger and the needle on the gauge moved up and down i then trimed the engine right down and the needle stayed at the top of the gauge. but the sensor was only half way could this be somthing to do with it?

[Hightower]

I think you can adjust the sensor position, try that!

[jyasaki]

Originally Posted by frothy top

I found the sensor i pushed it with my finger and the needle on the gauge moved up and down i then trimed the engine right down and the needle stayed at the top of the gauge. but the sensor was only half way could this be somthing to do with it?

The sensor will not give full range over the full swing of the motor. It should be at the highest "up" on the gauge well before the motor is furthest up (because you're trying to measure usable trim range, so all the way up means the motor is still in, or at least nearly in, the water.)

I would guess that the sensor halfway would still result in the motor being too high to run, so I would guess that the sensor is probably just sticking. See if you can lube it up somehow before trying to adjust it.

jky

[Limey Linda]

According to my brand new , very expensive, service manual the trim gauge/sensor only works on the lower 20 degrees of movement. Above that it is in tilt mode. Hope this helps.

[jyasaki]

Originally Posted by Limey Linda

According to my brand new , very expensive, service manual

LOL. Worth every penny, too, no doubt.

jky

[frothy top]

Yay, i found the problem. It was pretty simple . The plastic piece that the arm pushes against had become loose and was moving with the sensor arm. but when i did it up i broke it. opps. looks like a trip to lymington

thanks for your help

[Pete7]

Make sure there is a chair nearby when they give you the price

Pete

[frothy top]

I was expecting it to be a stupid price but it was only £2.50 so quite pleased, but given up as it takes to much brain power think i should replace the trim gauge with somthing like a digital clock or maybe a fuel gauge would be more use.