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VDO tachometer and NS Regulator

PostPosted: Mon Jun 09, 2014 7:59 pm
by petedd
I swapped out my engine and instruments with a Beta Marine engine with a VDO tach. I cannot get a good reading on my VDO tachometer. It either reads way high (off the scale) when the batteries are topped up or somewhat randomly (high or low) when the batteries are down a little, but mostly just reads off scale now. Is there a way to fix this or should I rig an inductive sensor (costs more than the tach itself) and stop trying to get a tach signal off the alternator? Thanks!

Re: VDO tachometer and NS Regulator

PostPosted: Mon Jun 09, 2014 11:56 pm
by Coulomb
Answer is here: http://www.amplepower.com/primer/tach/index.html

Re: VDO tachometer and NS Regulator

PostPosted: Tue Jun 10, 2014 6:13 pm
by petedd
Thank you. I will research a mechanical tach sender.