set up about a month while moving, first time out noticed tach reading over 6K rpms, boat is ranger 520 has never shown rpms above 5500. any ideas where to start troubleshooting r buy a new tach. thanks for ur input
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set up about a month while moving, first time out noticed tach reading over 6K rpms, boat is ranger 520 has never shown rpms above 5500. any ideas where to start troubleshooting r buy a new tach. thanks for ur input
Teleflex might fix or waranty the tach if it's bad.
Check all the connections on the back and make sure they are good. There is a rotary switch on the back that has little marks around it such as "6P", "12P", etc. Turn that switch back and forth a couple of times but make sure you put it back where it was originally.
There is a way to test one with a volt meter but I don't remember the exact numbers you are supposed to see. Basically you have a hot wire, which should get 12v anytime the key is on, a ground, and a sender wire. The voltage at the sender will vary with RPM of the motor via the stator and rectifier. Teleflex used to have the testing procedure on their site but I don't know if it is still there. Check the wires first and turn the switch back and forth and see if that clears it up.