Replacing rev/hour counter on Yanmar

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jwilson

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I have seen described two different fixes for a Yanmar or Volvo tacho with a dead hours LCD. Rather than do the quite complicated dismantle/modify job does anyone know if there is a standard unit that can just be put in as a replacement? My 3YM30 tacho/LCD looks just like a standard 4000 rpm VDO unit with Yanmar painted on its face.
 
charles_reed said:
Hour-meters are two a penny.

http://www.ebay.co.uk/bhp/engine-hour-meter
Tachometer is slightly more complex. Check your connection to the alternator.
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Yes, but I'd rather have things as they were, but working properly again, instead of making another hole somewhere and mounting a second hour meter. The tacho works, hourmeter (like loads of these on Volvos and Yanmars) LCD display has gone.
 
jwilson said:
Yes, but I'd rather have things as they were, but working properly again, instead of making another hole somewhere and mounting a second hour meter. The tacho works, hourmeter (like loads of these on Volvos and Yanmars) LCD display has gone.
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I seem to remember being quoted about £350 for one - and that assumed that I should fit it myself. I had thought that it was still under warranty, but they told me that it wasn't - since I only really wanted it to support the ongoing warranty on the engine, I then lost interest - t gets a service every spring, so I'm not really too interested in the actual hours.
 
I put together a short document to add a separate hour meter. I do not know if the Thorneycroft ones are still available, but I got a simple version that just counts when power is applied. I connected it at home to a battery charger for several weeks to get the hours reading the same as what I suspected my engine had done.

The unit I used is no longer available but this one is the same.. http://www.ebay.co.uk/itm/Hourmeter...ad5fadc&pid=100005&rk=2&rkt=6&sd=110612845608 Make sure you get a proper digital one and not a mechanical counter!

MIne has worked OK for several years now.

The document is too large to attach here but PM me if you are interested and I can email a copy.
 
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scottie said:
Hour meter does not need to be part of panel
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Indeed. I have two resettable ones on the switch panel by the chart table: hours since tank fill, and hours on this trip. A bit OTT perhaps, but they exactly fit the hole left by the RCD that now resides in a consumer unit.

See the Downloads section on my Bavaria site for details of the module I used.
 
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