Digital Hour Meter Reset

Posted on  by admin

So I had an hour meter installed at the helm when I bought my boat. This spring, after getting the sonar units back on the boat when getting it ready for another season, I had turned the key to the accessory position to test the units, but failed to turn the key off when I was done. Ten days later, go back to fiddle with something, and notice I had left the key in accessory mode which resulted in an extra 240 hours on the hour meter.
Is there an easy way of re-setting the hour meter to remove the 240 hours? Maybe disconnect the wires from ignition and connect to a battery in reverse polarity for 10 days? Or will that fry the hour meter?