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ContinuousWave: Small Boat Electrical
On second voltmeter in one year
|Author||Topic: On second voltmeter in one year|
posted 09-20-2009 09:39 PM ET (US)
I thought my [boat's voltmeter] was bad because it [indicated over 18-volts] even when engine was not running. I replaced it, and the new one worked fine until recently. Now it does the same. I tested the battery with a meter and it read 12-volts when engine not running and a little more when running; not [over 18-volts]. Any thoughts as to what is causing this?
posted 09-21-2009 12:25 AM ET (US)
Just for grins, I'd measure the voltage across the the
voltmeter, ignition off. It will and should (and probably will)
I'd guess you have subjected the voltmeter to a serious
What brand and model of meter? What boat?
posted 09-21-2009 09:34 AM ET (US)
It's a 1999 18' Dauntless with a 150hp 2 stroke Evinrude OceanPro. It is the standard OMC gauge. Thanks! I had to buy one last year and one this year. When I trim down the gauge will read 12 volts or less while trimming but shoots back up to 18 plus at rest.
posted 09-21-2009 08:11 PM ET (US)
The only method I know for testing a voltmeter is to compare its readings with a second voltmeter wired in parallel. The second voltmeter has to have known accuracy and calibration. A multimeter with a known accuracy of calibration makes a good secondary standard for comparison with the dash panel voltmeter in a small boat's electrical system.
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