Inaccurate trim/tilt gauge

Carlo · 03 June 2006, 07:00

I have a Yamaha 150F. All has been fine for 3 years but recently I have found that when the engine is fully trimmed down there are still 3 (out of max 5 or 6) 'blocks' showing on the Yamaha trim gauge (works like a mobile phone battery meter). When working properly of course there are no 'blocks' showing when trimmed right down. This also means that the gauge now shows that the engine is fully tilted up when it still has quite a way to go. How can I re-adjust it so that it reads correctly? Could it have been caused by keeping the thumb on the down tilt button too long after the engine has reached bottom?

Any help very gratefully received. Thanks. Carlo

BogMonster · 03 June 2006, 09:40

I saw a comment by somebody else on another thread a few weeks ago that you can set these somehow but I'm not sure what sort of sender "drives" the gauge and I guess it may be different between different sorts of engine anyway. Mine has an analogue trim/tilt gauge which seems to "lag behind" what the engine is doing i.e. if you move it, it takes about 1/2-1 sec before the needle catches up to where the engine is.

Just a thought but I should find out from a shop manual, what gizmo drives the gauge and how you adjust it, put the engine horizontal and adjust the sender, whatever it is, until the gauge agrees with the Mark 1 Eyeball. I have been meaning to do that on mine but not got around to it yet!

Erin · 03 June 2006, 20:15

There is normally a small plastic lever attached to the transom bracket which moves in as the engine leg is trimmed down. This sends the signal to the guage. It sounds as though the lever is either worn or something has come loose and it has slipped.

Carlo · 04 June 2006, 05:43

Thanks very much for your replies. I'll see if I can find the lever. If not A quick call to Yamaha might be the easy answer. Much appreciated. Carlo

Robox · 04 June 2006, 17:36

Had similar trouble with mine when i first bought the boat. As mentioned previously there is a spring loaded lever which rotates relevant to the engine position that is prone to rusting or sticking due to salt crystalisation,this was certainly the case with ours,and a liberal application of wd40 soon cured it.Hopefully that is all that is wrong with yours .

RobC
just read your post ,properly this time ,and what i said above may not be relevant but i'll leave it in just in case.

Robox · 04 June 2006, 19:05

This is what it says in my Yamaha F115 workshop manual,if the attatchments work!You may just be able to calibrate it via the gauge on your console?What does anyone else think?
RobC.

Carlo · 10 June 2006, 06:18

Thanks very much Robox. I'll take a look at my engine this weekend to see whether it works in the same way.