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Rectifier issue

N

Newtome

New member
I have a 2002 25hp with no electric start. It has a charging coil with three yellow wires. I want to charge a 12v battery. I purchased a used rectifier hooked it up to the appropriate yellow wires. It successfully changed the power from AC to DC but now its putting out 35 volts DC. Am I doing something wrong or is there something wrong with my rectifier? I'm usually pretty good with electronics but I'm new to the boating world. If anyone has any ideas for me it would be much appreciated!!
 
Newtome said:
I have a 2002 25hp with no electric start. It has a charging coil with three yellow wires. I want to charge a 12v battery. I purchased a used rectifier hooked it up to the appropriate yellow wires. It successfully changed the power from AC to DC but now its putting out 35 volts DC. Am I doing something wrong or is there something wrong with my rectifier? I'm usually pretty good with electronics but I'm new to the boating world. If anyone has any ideas for me it would be much appreciated!!
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The stator coil fitted to rope start models is an AC lighting coil . The coil which is fitted to electric start models and which should be included in the battery charging kit is different

I dont know what the difference is and I am surprised you get such a high open circuit voltage from a lighting coil but it does not indicate anything wrong with the rectifier.

I would connect it to the battery and closely monitor the results, especially the maximum volts it reaches once the battery is fully charged
 
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I just tester the voltage out of the rectifier with a multimeter before I hooked it up to a battery. I'm glad I tried that first.
 
vics said:
The stator coil fitted to rope start models is an AC lighting coil . The coil which is fitted to electric start models and which should be included in the battery charging kit is different

I dont know what the difference is and I am surprised you get such a high open circuit voltage from a lighting coil but it does not indicate anything wrong with the rectifier.

I would connect it to the battery and closely monitor the results, especially the maximum volts it reaches once the battery is fully charged
Click to expand...

I thanks for the advice. I was surprised with how much voltage It was putting out aswell. I really dont want to fry my new battery with 35v. I was hoping there was some kind of voltage reducer i could get for it.
 
I dont know the difference between a lightning kit and a charging kit. I am assuming the charging kit will charge my battery and the lightning kit is probably useless to me isn't it?
 
Newtome said:
I dont know the difference between a lightning kit and a charging kit. I am assuming the charging kit will charge my battery and the lightning kit is probably useless to me isn't it?
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The main difference is that a charging kit contains a rectifier while a lighting kit does not because it only supplies AC for the lights
The kits also contain all the necessary sundry bits and pieces

This page shows the parts of the charging kit. http://www.marineengine.com/parts/j...ry+Charging+Kit&yid=60913&mid=60937&sid=59001

This page shows the contents of the AC lighting kit. http://www.marineengine.com/parts/j...Ac+Lighting+Kit&yid=60913&mid=60937&sid=60966

Your engine already has the AC lighting coil fitted . I believe this was in fact standard for the rope-start version while electric start models were fitted with the battery charging coil and rectifier

I note the output of the charging kit is only given as 4 amps. It is only intended for recharging the battery after starting the engine. You don't say what your electrical power requirements are. Will 4 amps output be sufficient ?
 
vics said:
The main difference is that a charging kit contains a rectifier while a lighting kit does not because it only supplies AC for the lights
The kits also contain all the necessary sundry bits and pieces

This page shows the parts of the charging kit. http://www.marineengine.com/parts/j...ry+Charging+Kit&yid=60913&mid=60937&sid=59001

This page shows the contents of the AC lighting kit. http://www.marineengine.com/parts/j...Ac+Lighting+Kit&yid=60913&mid=60937&sid=60966

Your engine already has the AC lighting coil fitted . I believe this was in fact standard for the rope-start version while electric start models were fitted with the battery charging coil and rectifier

I note the output of the charging kit is only given as 4 amps. It is only intended for recharging the battery after starting the engine. You don't say what your electrical power requirements are. Will 4 amps output be sufficient ?
Click to expand...

I am only trying to run a small minn kota occasionally, a fish finder and some small lights so I can legally drive at night.
 
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