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Engine gauge issues

I have a Vetus 3 cyl engine and when engine is switched off The rev counter reads 15, also when running engine the volt meter is off the scale +16 make of rev counter and Volt meter is Rimmer
How can I sort this Many thanks Jim NB Ghostrider

Asked by: Jim Bratt  | 8.44am, Monday 12 August

WW says:

Many instruments do not return to zero when the signal is removed, but continue to display the previous reading unless told to go to zero. If when the engine is running the rev counter reads correctly, this will be a fault within the instrument, or might be caused by the power to the rev counter being removed too quickly when the engine is stopped; giving it insufficient time to return the display to zero.
The voltmeter could be a more significant problem, depending on where the fault lies. If the voltmeter reading of in excess of 16V is true, your batteries will be being cooked; with the associated loss of water, production of explosive hydrogen gas, and accelerated failure. If this is not the case and if you can measure the battery voltage with another meter to check; it is more than likely that the meter is faulty and should be replaced. If it is one of the simple circular automotive style meters, these are notoriously inaccurate, and it would be well to consider fitting a more accurate battery monitor.

Rupert Smedley  | 12.53PM, Monday 12 August

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