Trim Gauge problem

[skibsplast]

Hello

I try to upgrade my boat with digital tach and speedo but have a problem to get the trim on tacho to work. I hope you experts in here can help me.
When I connect the harness from trim sender to the new tacho the trim bar goes to the top and the top bars blinking. ( when I connect back to the old one then the old one works, so it should not be a problem with the sender?
I am from Norway, so my engine is a european Yamaha 80hp type AET year 1987 with 703 remote control ( identical with 90AET except from carb id and exhaust manifold id) Not sure what name this type have in US. The tach have 4 single wires and 2 terminal block, I connect the 4 single wires to the harness from remote and the harness terminal from the trim sender I connect with adaptor between to the terminal block that have the pink, grey, orange and black w/whit stripe. The other terminal block on the tach I dont connect anything to since I dont have oiltank on my engine (this block is for oiltank sensors?), I add oil directly in gas tank. Anyone that have an idea of what I do wrong?
I attached some photos. I am not the best in english so I hope you understand what I have written.
Best regards from Norway
Björn

[boats.net]

Not sure about European gauges but it appears that your engine has a four wire trim sender and new gauges are for 2 or 3 wire trim senders, so they are not compatable with each other.

[skibsplast]

Hi
Thanks for your reply. The trim sender on my engine have 4 wires black, grey, pink and orange. The dip switch on my new tach have 2 or 3 wire options. I see on boats.net spare catalog that the trim sender for this engine is the same as I have on my engine, same part number 6E5-83672-01 (1987 90ETLH Yamaha Outboard POWER TRIM TILT SENDER Diagram and Parts). Any idea that other trim sender with 2 or 3 wires will fit my engine?

Best regard
Björn

[rodbolt17]

your actual trim sender should have 3 wires, the gray wire is visual overheat indicate.
set the dip switch setting for 3 wire sender.
and check the sender resistance and voltage feed back per service manual;

[skibsplast]

Hi

It seems like my trim sender (part no. 6E5-83672-01) will not work with digital gauge since the trim sender have 4 wires. This trimsender is also used on 1987 90ETLH and 1986 115ETLJ. Anybody knows about another yamaha trimsender with 2 or 3 wire will fit my engine? Center-Center screw hole on the clamp1 bracket were the sender is fasten, is about 40 millimeter ( 1 5/8 )

Thanks!

Best regards
Björn