Marine Electronics Forum - Why Does my A65 Turn OFF when engine is cranked

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06-04-2007, 10:55 AM
Why does my A65 turn off when the engine is cranked over. I think it is because off a voltage drop but they are new batteries.
With engine off I am running about 12.1-12.5 13 volt with engine running

Any Help

06-04-2007, 11:05 AM
It doesn't mattet that your batteries are new. The leg that the A65 is on is dropping, momentarily, below the A65's voltage threshold. Either a) isolate one battery for "house" applications and take it out of the cranking circuit, b) get something like a NewMar StartGuard that maintains voltage during cranking, or c) (and this might not be enough) run the A65's power straight to one battery and off the DC distribution panel it is on.

06-04-2007, 11:07 AM
When you crank the engine over, your voltage can drop to below 10 volts momentarily. That's enough to cause the A65 to turn itself off.

There are a couple of solutions:

1 - separate the house battery(ies) from the starting battery(ies)
2 - get a Newmar StartGuard -
3 - turn off your A65 when starting your engine

06-04-2007, 11:21 AM
Mine was doing this and I was planning to install a vsr or startguard or similar but for unknown reasons, it has not done it on my last few outings, so Im leaving it until the issue reappears. Mine is a single F150, 2 batteries.

06-05-2007, 12:04 AM
Yes, it can happen for reasons as stated. That;s why I am hard wiring mine and asking how here:

That's assuming you have a house and starting battery.

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