ledzeppelin135
Petty Officer 2nd Class
- Joined
- Jul 27, 2011
- Messages
- 129
Hi, I am installing a voltmeter and tach on my 83 50hp merc. I guess I am wondering how to install these gauges. I hooked up the voltmeter to the red power wire leading to the ignition switch and the ground to the black and it read the battery volts, but the concern was that the key was in the off position and it seems that a gauge hooked up with the battery hooked up would eventually run the battery dead. Also I have been told this motor is a 12 pole and I bought a group of gauges off ebay with no info on the tach. It says no brand, all it says is it was made in like 1979, it has a blue case and a +, -, and P connectors and a little dial on the back that says 4, 6, 8. I tried all these settings and on four it read nothing and on 6 and 8 it read on 6. I had this gauge connected from the P to the grey wire in the motor harness, the + to the red wire and the - on the black wire. This gauge goes to 6 but says x100 instead of 1000. I am assuming that it would still work though as I know of no engine that can only max out at 600 rpms. Any help would be appreciated as I am heading to the lake tommorow. Thank you,
Chris
Chris