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post #3 of Old 03-13-2012 Thread Starter
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Re: Changing Out Engine Gauges/Tach Problem

Can anyone give me an idea as to whether the ac voltage of .025-.050 (from low idle to high) from the sending unit mounted into the side of the engine is enough to power an older VDO tach, or a replacement new one? I want to change out the tach and other instruments, but want to get everything purchased and available before I go back to the boat to do the install. I don't know if the sending unit is actually working or not. Maybe someone is willing to voltage test their sending unit for me?
Volvo-Penta MD7A....anyone? :-)
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