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Old 05-30-2016, 04:34 PM   #1
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Tachometer

I have a 1982 Californian with Perkins engines. The Tach for the port engine on the fly bridge did not work the first time I took the boat out this season. It works on the lower station and there do not appear to be any loose connections.

Any suggestions?
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Old 05-31-2016, 03:08 PM   #2
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Did you run the engine up anywhere near full throttle, even momentarily?
Neither of the tachs will work on Otter until I give the engines a good "goose" up to 1,500-1,800 rpm.
It has to do with the alternator turning over fast enough to put out enough voltage to run the tach.
From my limited experience, I understand it's relatively common.
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Old 06-23-2016, 05:17 PM   #3
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Problem solved. It was a broken ground wire between the two tachs on the upper station. The ground is not show on the drawing, I noticed when I took them off to get at the back to remove the tach.
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Old 06-25-2016, 09:37 PM   #4
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Wow, a true easy fix!!! Savor the moment.
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Old 11-19-2016, 09:30 PM   #5
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Also. Msny tachs that run off the alternator require a load on the electrical system to function. With fully charged batteries they may not ooerate when you stat up. Turn on some lights or a pump to get it to function.
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