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Old 05-03-2015, 11:08   #1
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Adding 12v lighting to non-electric outboards?

So after going thru many portable dinghy nav lights (battery operated) I thought about adding a lighting coil to my Yahama 15hp (manual) 2 cycle outboard. The part is less than $90 and seems easy enough to add. Has anyone tried this??
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Old 05-03-2015, 11:28   #2
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Re: Adding 12v lighting to non-electric outboards?

I want to think you need a rectifier too, and without a battery the lights will be very dim at idle, I get this from dirt bikes many years ago, but I'd be surprised if it was any different. May not need a rectifier, my Husqvarna had a lighting coil, and at idle the lights were very dim, but bright at high RPM, that was 1974 and I don't know if it had a rectifier or not.
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Old 05-03-2015, 11:36   #3
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Re: Adding 12v lighting to non-electric outboards?

Is the output regulated? Does it supply 12 volts DC at all speeds? Is it a real Yamaha part intended to power lighting?


If the answer to all these questions is "yes" then it might be just what you need.
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Old 05-03-2015, 20:13   #4
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Re: Adding 12v lighting to non-electric outboards?

This is theory, I've never tried it, but the operator's manual found here:


http://www.yamaha-motor.com/assets/s...rrent_1793.pdf


says that the alternator puts out 80 watts at 18 volts. So if you could find an 18 vac light, you (in theory) wouldn't need the rectifier.


But the smart thing to do is get the rectifier and maybe a small battery (or LED lights?) The amps comes out to 4.4 so if that's across the rpm range, you probably won't even need a battery, especially if you use LED lights.
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