Thread: 798 cutting out....

Check battery voltage. Make sure it's at least i believe, 11.5. I think thats what Canepole told someone else.

Yes, you are getting a voltage drop when starting the motor. That's not healthy for electronics. It could be your battery's condition or state of charge, or poor wiring connections. I was getting low voltage to my electronics by powering them off my fuse panel. I ran a separate wire straight to the battery, for my electronics, and that cured the problem. Of course the separate wire still has to have a fuse in it.

Several possibilities:

Cranking battery is old, or is too small for your outboard. The fix is a new battery with sufficient CCA for the outboard.

Cranking battery isn't being charged fully between trips or is being used heavily without enough outboard run time to recharge it during the day. The fix is eitherchanging charging practices, a new cranking battery with larger RC (keeping the CCA requirements in mind) or spending more time running around and less time fishing

Bad connections in the cabling to the 798. If you are tapped in at a panel, try running the wires directly to the battery.

Another solution is to add another battery dedicated to the electronics, along with a charger.

My 997 has this problem. It freezes when cranking, but my Lowrance or Garmin doesn't. I have a new cranking battery with twice the Yamaha recommended CCA and reserves. New battery may or may not fix the problem. I just shut the unit off before cranking, then turn it back on.

Wire the head unit direct to the battery. This may or may not help.

I feel your pain.

Originally Posted by Cane Pole

My 997 has this problem. It freezes when cranking, but my Lowrance or Garmin doesn't. I have a new cranking battery with twice the Yamaha recommended CCA and reserves. New battery may or may not fix the problem. I just shut the unit off before cranking, then turn it back on.

Wire the head unit direct to the battery. This may or may not help.

I feel your pain.

It's hard to believe that the great CP could ever have an electrical problem...:D:D:D

I was thinking about putting in a small capacitor like the loud thumping speaker guys put on their cars to protect their stereo amps on start up from the same kind of thing...

any thoughts?

Originally Posted by aekhoff

I was thinking about putting in a small capacitor like the loud thumping speaker guys put on their cars to protect their stereo amps on start up from the same kind of thing...

any thoughts?

Your unit is shutting down because it is sensing low voltage and choosing to shut down. That threshold is adjustable on Humminbirds. If your cranking battery can't hold 10.5V while it is cranking the outboard, there is a problem, and a cap isn't going to have any effect unless it is so large as to be a battery in itself. The outboard will actually draw power from such a capacitor for the microseconds that it can hold more voltage than the battery.

Same issue with my 798. I checked the voltage and was only pulling 9 v out of the panel. I had to run straight ot the battery to get enough. What a pain.