SailNet Community - View Single Post - beta marine BD722 tach acting very very strange!
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post #5 of Old 07-28-2011
NCboatrx
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It is also possible that the new battery is absolutely fully charged so the alternator is not providing any output. When you switch on one of the accessories you are creating a load and this gets signaled to the alternator which starts charging and thus the tach starts working.

Stanley,
Marine Diesel Engine Vendor
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