Trim Gauge - incorect reading

[whisper]

Hi, I have just fitted an OMC Trim Gauge to my Johnson 40hp 2 stroke it's a 2002.

This is a new fit so before I drilled the hole in the console I wired it up to make sure it works which it does however it gives the incorrect reading. With the engine tilted fully in the up position the gauge only reads about 3/4 high and when the engine is lowered the gauge reads at its lowest point way before the engine is down.

Does anyone know what the problem could be and how to test it?

Thanks in advance

[Nos4r2]

Is the trim sender moving through its full range?

[whisper]

Hi Nos, Yes it moves ok with the engine however it was sticking but I sprayed some GT85 on it. I don’t know if that would have messed up the sender as the spray contains PTFE?

[whisper]

I think I've sorted it now, I found this on the net and tested the gauge, I then reconected the sender wire and it was alot better. However I think I may have a faulty gauge.

http://www.downloadingfiles.co.uk/te...m%20Gauges.pdf

[jyasaki]

Sounds more like the sender is positioned incorrectly.

Did the test of the gauge (applying 12V and 0V while powering the gauge) read correctly (i.e. full up and full down)?

If so, then when you're tilting the motor, the sender is being activated too early as the motor swings down. You'll need to move the arm of the sender or whatever hits the arm so it so that it travel the full range (rather than the 3/4 you've got now.) You can test that by locking the motor full up and moving the sender further by hand. If it goes to full up, that's your problem.

jky