I think I posted about high temperature gauge readings a couple of years ago, but I can't find that thread...so here's a new one.<br /><br />A couple of years ago I learned a lesson about impellers and running without muffs. I was under the mistaken impression it was okay to idle the motor dry as long as the motor didn't get too hot.<br /><br />Boy, was that mistaken belief corrected in a hurry.<br /><br />Anyway, the afternoon I unknowingly destroyed the impeller, we launched the boat with my wife at the helm. By the time I parked and walked back down to the dock and out to the boat, smoke was pouring out from under the cowl and the warning horn was blaring. When I got a handle on what had happened, I thought we had toasted the powerhead.<br /><br />I was lucky! A new impeller fixed things up, but then we found out a switchbox had failed---I would assume it was related to the overheat. After that was taken care of, we had no real trouble, but the temp aguge always read real high. I ckecked the motor with an infrared thermometer, so I knew it was really okay all the time, but the gauge reading always bugged me.<br /><br />I finally found the part number for the temperature sensor and installed it, and now things are looking right again.<br /><br />So, the information I am trying to relay here is that an overheat apparently can screw up a temp sensor, as well as take out a switchbox.<br /><br />Just thought I'd pass that along!<br /><br />PS---another thing I found out was that a bad (presumably shorted) cell in your battery can cause low readings on the voltmeter. I saw this happen too during the troubles, and thought I had a bad regulator.
