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Jan 23rd, 2013
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Johnson Fastrike 175 Charging System #13202667 07/02/19 08:11 PM
Joined: Jun 2003
Posts: 355
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AGSWON Offline OP
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What gets replaced on these Johnson Fastrikes when the battery charging system starts to get weak? I notice this weekend that I'm only getting about 13.0 - 13.5 volts when running 4k rpm. I use to get 14.0 - 14.5 volts. Not sure why it is getting weak, but the battery is almost brand new AGM Interstate. I replaced it about 5 months ago. The running battery seems to be losing charge very quickly during a day of fishing.

Re: Johnson Fastrike 175 Charging System [Re: AGSWON] #13202856 07/02/19 10:03 PM
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Posts: 11,544
gary purdy Online Content
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Regulator-rectifier but I would have that battery checked out because I just had a 34-agm go bad in 2 months.


The world will not be destroyed by those who do evil, but by those who watch them without doing anything. Remember what He has done and remember that He is not done yet!-- GOD IS GOOD
Re: Johnson Fastrike 175 Charging System [Re: AGSWON] #13203412 07/03/19 01:33 PM
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boatman025 Offline
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Check all ground and get battery checked before spending money on a regulator


Hughes Marine Service
3855 Osage Lane
Wylie ,Texas
Re: Johnson Fastrike 175 Charging System [Re: AGSWON] #13203429 07/03/19 01:44 PM
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AGSWON Offline OP
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I took the battery out and had it checked yesterday evening. It was good. I notice the drop in voltage most during idling. I can't run my fish finder and aerator at the same time when idling without my volts dropping below 11 which turns off the fish finder and aerator. It's really frustrating. When the engine isn't on, I can't run the aerator and fish finder without dropping volts below 11 also. If the aerator pump is going bad, do they pull more voltage than when new? Maybe this is my problem.

Re: Johnson Fastrike 175 Charging System [Re: AGSWON] #13203614 07/03/19 04:08 PM
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PlanoPaul Offline
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Sounds like a grounding issue to me.

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