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Old 10 December 2013, 12:09   #1
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Country: UK - England
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please help will my outboard charge a battery

can anyone help please can anyone tell me how i go about checking if an outboard can charge a battery please i have a johnson 35hp many thanks
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Old 10 December 2013, 12:22   #2
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Is it electric start already?
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Old 10 December 2013, 12:31   #3
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Do you mean (1) is my outboard charging my battery? or (2) is my outboard capable of charging a battery?

1. - First step, measure voltage at battery terminals with engine running.
2. - Does it have two thick (usu. Black and red) wires coming out the front, or a connection point with two reasonable sized holes (usu. on the front with a small cover over it).
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Old 13 December 2013, 07:01   #4
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Hi it's an old Johnson 35 with pull start but I want to have electrics on the rib do I just go down the route of just having a battery and keep it charged up many thanks
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Old 13 December 2013, 07:10   #5
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Does you outboard have the facility to charge a battery?
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Old 13 December 2013, 07:21   #6
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Have a look at this link and select the year then model, you should see from the parts list if your OB has a charging circuit.

Johnson Outboard Parts
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Old 13 December 2013, 07:58   #7
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Whisper that was fantastic just what I was looking for model j35balcts if I am reading correct says ac lighting so should have a 12 volt out is this correct many thanks for your help
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Old 13 December 2013, 08:28   #8
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I found this on the net regarding your j35balcts model number...

J Johnson
35 HP
BA Belgium, AC Lighting (Rope Start)
L 20 inch shaft
CT 1983 (I-N-T-R-O-D-U-C-E-S corresponds to 1-2-3...-9-0)
S Model Run
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Old 13 December 2013, 08:50   #9
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Quote:
Originally Posted by Dazz View Post
Whisper that was fantastic just what I was looking for model j35balcts if I am reading correct says ac lighting so should have a 12 volt out is this correct many thanks for your help
AC Lighting Circuit will need rectifying (to change to DC) and regulating (to prevent the voltage going too high) to charge a battery. The volts will vary with revs.

I have 3 wires on my 15HP, you will need to see how many your engine has.

I believe a lot of people use a motorcycle unit to do this. You will need one capable of handling the amperage.
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Old 13 December 2013, 09:39   #10
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Many thanks for the reply guys I now know the way forward many thanks
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