SailNet Community - View Single Post - Beta Marine BD722 Tach kicks in after I enable extractor fan!
View Single Post
  #7  
Old 05-09-2012
SaltyHog SaltyHog is offline
Junior Member
 
Join Date: Sep 2010
Location: PA
Posts: 21
Thanks: 1
Thanked 0 Times in 0 Posts
Rep Power: 0
SaltyHog is on a distinguished road
Re: Beta Marine BD722 Tach kicks in after I enable extractor fan!

It's likely that the alternator is providing the (RPM) signal to the tach. If your batteries are all charged up and there is no other load on the alternator, the alternator regulator removes the field from the alternator. No field, no tach signal. As soon as you add a load, alternator is back on and the tach then works. Just a theory. Will switching on any other load make the tach operate? (Say, the fresh water pump?)
Reply With Quote Share with Facebook