Re: Installing an hour meter
You can get a gauge for the dash (or the engine compartment) and just hook one side to negative (black) and one to key-on positive (purple). Or you can get a digital model from MerCruiser. It has a permanent battery and a sense wire that wraps around a plug wire. The nice thing about the MerCruiser option is that it only ticks when the motor is running. Leaving the key on by accident doesn't add time. It works on any motor with a sparkplug. You could put one on a chainsaw.
