3 weeks ago
I have primary motor cranking battery and would like to add a secondary back-up cranking battery. At the same time, I will be adding a 15HP Etec Kicker Motor. My main engine is the G2-200 HO model. Ultimately, my goal is to be able to charge both batteries reagardless if the kicker or the main engine is running. I would also like to be able to switch over to back-up battery as an emergency in the event of a primary battery failure. Seeking assistance on this wiring scheme.
Any input would be appreciated.
2 weeks ago - last edited 2 weeks ago
Connect the 15 HP to the secondary battery. It is best never to run both motors at the same time. You can leave the auxiliary charging lead off the secondary battery and run them independently yet have the capability to have either engine charge both batteries if needed.
"There is never just one thing wrong with a boat";
-- Travis McGee, main character in a book series by John D. McDonald
The factory recommends that a properly trained technician service your Johnson or Evinrude outboard motor. Should you elect to perform repairs yourself, use caution, common sense, and observe safety procedures in the vicinity of flammable liquids, around moving parts, near high-temperature components, and working with electrical or ignition systems.
The information offered here is only general in nature and should not be construed as complete factory approved procedures, techniques, or specifications. Always use the proper service manual for your motor, up-to-date service literature, the correct tools, and have an understanding of how to proceed with troubleshooting and repair methods. If you are unsure or uncomfortable with a procedure, a situation, or a technique, enlist the services of a factory trained technician.
I think this will solve my problem. Thank you for the wiring diagram. Just to clarify, running both engines at the same time could create power imbalances in that system causing "bad things" to happen correct? I'm wondering if there is any sort of automatic interlock using a reversing contactor that would prevent both engines "charging" the system at the same time.
The only solution that I could come up with would be some sort of intelligent relay that looks at the power from both ignition circuits and opens / closes a reversing contactor based on both ignition power signals being in "true" state therefore opening one side of the reversing contactor to prevent sual charging.......