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2004 mercury 40 ml pull start .. Can it charge a battery…

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2004 mercury 40 ml pull start .. Can it charge a battery…

Old 05-16-2019, 10:28 AM
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Default 2004 mercury 40 ml pull start .. Can it charge a battery…

I have a 2004 Mercury 40 hp two stroke on my 13 foot whaler… It has two yellow wires coming from what I believe is the stater, how do I make this charge my battery ? It is a pull start motor and the yellow wires Dead end with bullet connectors… TIA for any help
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Old 05-16-2019, 12:52 PM
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Complete engine serial number is needed.
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Old 05-16-2019, 01:19 PM
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You'll need to add a voltage regulator. One from an electric start model should do the trick. If you add one, make sure to never run it without a battery hooked up.
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Old 05-17-2019, 05:27 PM
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Originally Posted by RJTaylor View Post
You'll need to add a voltage regulator. One from an electric start model should do the trick. If you add one, make sure to never run it without a battery hooked up.
Why?
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Old 05-17-2019, 05:32 PM
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Depending on the exact model, it may or may not have some of the correct parts for charging. Worst case you can buy the parts on eBay.

As mentioned, get the model # and look up the parts list to see what you have.
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Old 05-17-2019, 08:02 PM
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Originally Posted by alloyboy View Post
Complete engine serial number is needed.
OT952592 40 ml
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Old 05-18-2019, 07:15 AM
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Mercurypartsexpress shows an electric model and a manual model. Each uses a different stator and flywheel.

I would measure the AC voltage from the two wires that you mention to see if they have voltage on them.

Most any motorcycle/outboard motor two input wire rectifier/regulator could be used to convert the AC to DC and to maintain the DC voltage at nominally 14.5 volts.
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Old 05-18-2019, 12:33 PM
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Here's the listed accessories.

https://www.boats.net/catalog/mercur...06/accessories

There's a rectifier kit made for that serial number.

https://www.boats.net/product/mercur...bdab66a9acc9ff
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