jasontd101
New member
This is my first post on the forums and appreciate any help anyone can provide. My 90 HP ocenapro Evinrude I purchased recently has an issue with the tach. The tach does not work at all. I have already replaced the voltage regulator so I know that is not the issue (the new regulators do not have a purple wire but was told that is normal). The tach has the 4 warning lights and I know the hot engine light and low oil light work as I have had both go off since I had the boat. Hot engine light was clogged thermostats and low oil was the oil tank was low (I use my vro). So with that said when I turn the ignition key on before starting the engine it goes through the test and make a loud warning sound and then all 4 warning lights run through their test sequence properly and the tack needle very slightly moves (hard to see but it twitches a hair). I pulled the plug off the back of the tach and put my voltage meter on the black (-) and grey (+) wires and I get nothing if engine is running or not. I did check the plug from the voltage regulator as well and all the wires and plug connection look very good.
What should I do next? Should I run an ohm test from the black and grey wires on the plug running to the back of the tech? When the boat is not running should I get some ohm reading so I know the wire is not sliced somewhere? Is there anything besides a sliced wire at this point that would cause no voltage on the grey and black wires on the plug that connects to the tach? From what I read the tach runs off the voltage regulator but I just swapped that and still have the same issue as before changing it out with a new one. What else could cause the tach not to operate at all? I have only run a voltage test on the plug that connects to the back of the tach at this time and as stated no voltage when off or running.
Thanks for any help that you can provide
What should I do next? Should I run an ohm test from the black and grey wires on the plug running to the back of the tech? When the boat is not running should I get some ohm reading so I know the wire is not sliced somewhere? Is there anything besides a sliced wire at this point that would cause no voltage on the grey and black wires on the plug that connects to the tach? From what I read the tach runs off the voltage regulator but I just swapped that and still have the same issue as before changing it out with a new one. What else could cause the tach not to operate at all? I have only run a voltage test on the plug that connects to the back of the tach at this time and as stated no voltage when off or running.
Thanks for any help that you can provide
