Wiring Yamaha outboard tach - Yamaha Boating

Good day William,
You Connect the tach wire On The Voltage Rectifier ,
Rectifier Should Have 2 Yellow wires Connected To It Connect Tach Wire Together With One Yellow
Regards
Gordon

Purple is usually 12v+ power
check with meter

Broken wire in loom,white wire,bad connection in loom plug,if it switches off with kill switch,then it points to ign switch

Yamaha 2005 150 HPDI wiring diagram

Looking for wiring diagrams for digital tachometer with trim indicators and warning signals. Mine had the plastic trip arm break. No trim reading on Tach face. Replaced trip arm forsensor arm and now have no reading on the tach at all except extremely light tach Number. All other electrical components work OK.

Wiring harness help for Yamaha 703 Control

I do not believe so, as the tach is related to your firing electrical pulse. have you checked the tach wiring for loose connections?

The gauge is for a Yamaha with a remote oil tank. Low oil and no oil. the manual is available at yamaha motors.com. in pdf download format .the year will be almost impossible to find out. the part number can be found at your local dealer. a good parts person can find that by just your description

Tachs are coil sensing. Since you have a start problem, chk tach wiring at coil and coil wires.
If all is good, Locate or identify the tach wire and disconnect it. The tach wire should be on the negative side of the coil. If bike starts without tach wire hooked up, Your tack is more than likely the culprit. If bike stll won't run, chk for power to the coil and any possible fuse in ignition circuit. Under the seat I think. Good Luck