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Old 24-08-2023, 06:08   #16
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Re: Yanmar Tachometer

I am just guessing here. Do you have a button on the back of the tachometer? It may not be original tachometer. If so it may be a VDO

Check this link with instructions regarding the "select function"

https://j109.org/docs/vdo_programmab..._hourmeter.pdf
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Old 24-08-2023, 06:16   #17
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Re: Yanmar Tachometer

I'll take a better look but I would say it is original.
Thanks for the link.
Is that function only for VDO?
Original Yanmar supports it?
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Old 24-08-2023, 07:22   #18
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Re: Yanmar Tachometer

You may get more specific answers on Yanmar Marine Engine Owners Group on Facebook, lot of knowledgeable folk on that site.
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Old 24-08-2023, 08:19   #19
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Re: Yanmar Tachometer

According to Catalina:
https://www.catalinadirect.com/shop-...netic-pick-up/

1) The calibration potentiometer is under the sticker at the back (see "More Images" below). It is a delicate electronic device mounted to the far side of the circuit board with three soldered on contacts. The adjustment is accessible through a small hole in the board. A watch maker can successfully adjust it without damaging it or pushing it off of the circuit board. Our experience indicates that mechanics are too ham-fisted and will break it every time. If approximately correct isn't accurate enough for your needs, you can attempt to adjust it using a jeweler's flat blade screwdriver (not phillips head). But once you remove the sticker over the calibration screw, the warranty is void and the tachometer cannot be returned.

2) Each tachometer is bench tested before it leaves. This leaves the indicator at a position other than zero. Once you install the tachometer, the indicator will return to zero when the engine is stopped with the kill lever before the ignition is switched off.

3) In the year 2000 the PC board changed resulting in the connecting studs on the back of the tachometer to be positioned on opposite sides of the pre-2000 magnetic tachometers. If you are replacing a pre-2000 magnetic tachometer, ensure you read the labels on the back of the tachometer to connect the correct wires to the correct studs.


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Old 24-08-2023, 11:47   #20
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Re: Yanmar Tachometer

Thanks! I think I am ham-fisted ....
I think mine looks totally different. It has plug on the back and LCD.
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