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Suzuki DF40A starter/motor or battery issue

M

mknowlesus

New member
Hi all, I have a strange issue with my boat/motor that I wanted some troubleshooting steps to look at. I have 2 new 12v marine batteries but this also happened on the previous battery that came with the boat. Basically, the motor starts right up and everything works fine. If I am out on the water and I turn it off to anchor/fish etc., it may or may not start back up. When it doesn't work, I turn over the key and I hear the warning alarm and then a click noise and then nothing. The battery would appear to be completely dead, but I know that the battery is still fully charged. I swap the battery leads over to the other fully charged battery and it starts right up. If I test the battery that would not start, it still has a full charge. Eventually I can use the other battery and the boat will start up.

I don’t think these batteries have any type of memory in them. Does this sound like an issue in the motor itself or maybe in the wiring where you turn the key?

Thanks for any assistance!

2013 Suzuki DF40A

Batteries – Basspro BP24MX (again this happened with other battery)
 
Check your white wire AKA battery sub cable in Suzuki talk. Meanwhile I’d be checking all wires and connections for corrosion, it appears that if you disturb the wiring to change batteries it works again so possibly electrical. The link below might or might not be useful. In the no start condition, can you manually start the engine? If you can’t manually start the engine maybe a neutral safety switch?

"White Wire" Power failure - Suzuki Outboard Forum

Ask the experts on our Suzuki Outboard Forum for repair issues, diagnosing problems, links to diagrams, suggestions on buying parts and more. They can answer questions for any Suzuki outboard model or horsepower.
www.suzukioutboardforum.com
 
William01 said:
Check your white wire AKA battery sub cable in Suzuki talk. Meanwhile I’d be checking all wires and connections for corrosion, it appears that if you disturb the wiring to change batteries it works again so possibly electrical. The link below might or might not be useful. In the no start condition, can you manually start the engine? If you can’t manually start the engine maybe a neutral safety switch?

"White Wire" Power failure - Suzuki Outboard Forum

Ask the experts on our Suzuki Outboard Forum for repair issues, diagnosing problems, links to diagrams, suggestions on buying parts and more. They can answer questions for any Suzuki outboard model or horsepower.
www.suzukioutboardforum.com
Click to expand...
Great, thanks I will look into that. I am not sure how to manually start the motor, I don't believe it has a started cord but will look into that as well.
 
William01 said:
You will have to pull the flywheel cover off, owners manual will have the details under emergency starting procedure.
Click to expand...
Ok thanks for the info. I have an update to the symptoms. I reproduced this issue yesterday. Basically when the problem came up, I was able to still use the accessories that were connected to the battery as the battery is not dead. The starter was dead and the trim functionality on the throttle handle did not work. Also, trying to use the trim on the motor itself did not work as that was also dead. I swapped to the other battery and the motor started right up. I went fishing for another hour or more, came back, swapped back to the original battery and the motor started up fine.
 
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