Engine Gauge Question

[TKAS400]

I have a 1984 Marine Trader Labelle with Volvo Penta TAMD40B engines. A couple of the upper helm gauges have problems (Temp & Ammeter). I see replacement gauges labeled VDO and US - what is the difference and what do I need? I also have a sending unit on one engine that needs replacing for the Ammeter issue (both upper and lower helm ammeter gauges fluctuate wildly). Thanks for any help.

 

[mkast]

Re: Engine Gauge Question

I have heard of a shunt for an amp meter, where does this "sending unit" attach to the electrical system? The information you provided would send me looking for bad grounds in the system.

 

[Don S]

Re: Engine Gauge Question

Moving to Electrical forum

 

[Silvertip]

Re: Engine Gauge Question

My suggestion would be to get rid of the ammeter and replace it with a voltmeter. This eliminates the need for the shunt and heavier gauge wiring associated with it. The voltmeter provides a more meaningful indication anyway. VDO is an instrument manufacturer -- part of Siemans AG. Gauges can be calibrated in US, METRIC, or both values.