Westerbeke w27 Tachometer/Gauge Issues - SailNet Community

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Go Back   SailNet Community > On Board > Gear & Maintenance > Engines > Diesel
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Diesel This is a forum dedicated to diesel engines and their applicable accessories.


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Old 03-03-2010
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Westerbeke w27 Tachometer/Gauge Issues

I just rebuilt my Westerbeke w27, runs great but in our hurry to get it out of the boat we didn't take good notes about the wiring harness and I'm having a hard time getting the control panel working.

Oil pressure gauge works, temp gauge I can get to max out by putting sensor/sending wire to ground but get no movement when it's on sending unit on thermostat

the tach from what I can tell works off of the alternator, it's one of those Mitsubishi 50amp alternators, on the back of the alternator there are plugs labeled R, L and P -- none of which are the DC out -- I need to find the AC out since that what the tach uses.........

does anyone else have a w27 with the admiral control panel? I've tried looking through the manuals, but can't seem to get this figured out......

Thanks!
Brian
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Old 03-04-2010
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The R terminal is an auxiliary terminal it should have 7v output. that is the terminal your tach gets hooked up to. The R terminal is also used to flash (or energize) the alternator field if the magnetism in the rotor has weakened from not being used in a long period of time. The L terminal should be for the volt meter or indicator light. Not really sure what the P terminal is for though.
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Old 03-04-2010
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You can also call or take it to your local alternator starter re builder they should be able to identify the terminals with ease.
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