98 Nissan ns15d2 regulator rectifier wires

roaoro

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Jul 11, 2011
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I"m wanting to put a battery on my boat, and am pretty sure my engine has a charging coil already in it, and just need to wire in a regulator/rectifier. I can't bring myself to spend $120 for the OEM one, when I'm pretty sure one of the generic ATV or motorcycle ones should work. My motor has black, yellow, and white wires coming from the assumed charging circuit, and want to make sure I hook them up right. Any thoughts?
 

Sea Rider

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Sep 20, 2008
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Which type of bat do you plan to install to power which gadgets ? If using a car size bat, probably will not be fully charged if going for a generic unit.

Happy Boating
 

pvanv

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Someone quoted you the wrong price. You just need to add the
3G2760600MRECTIFIER$60.83
 
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roaoro

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3g2760600m rectifier I believe is for the 4-stroke models. I don't know how different the 2-stroke rectifier (346-76160-2) is, or why it's almost twice as much. I'm guessing due to the higher revs of the 2-strokes, they require a higher regulated rectifier? Sea Rider, this is on 14' aluminum boat, and am only planning on a couple small dry cell batteries to power some LED lights, a fish finder, and probably a small radio.
On the wiring, I'm pretty sure the yellow and white wires are carrying the AC current, I'm just not clear on the black wire. Common sense tells me ground, but I want to make sure. I checked for continuity from black wire to a ground, but nothing. There is continuity from the black wire to yellow wire, and black wire to white wire though.
 

pvanv

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There is little, if any, RPM difference between the 2- and 4-stroke models. The older, complete kit:
346761602MRECTIFIER KIT 8B THRU 40C$108.96
would work, but the modern
3G2760600MRECTIFIER
is indeed the rectifier listed by Tohatsu America (Nissan Marine) for application: 18E2/15D2/9.9D2~ FOR EP, EF
 

roaoro

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There is little, if any, RPM difference between the 2- and 4-stroke models. The older, complete kit:
346761602MRECTIFIER KIT 8B THRU 40C$108.96
would work, but the modern
3G2760600MRECTIFIER
is indeed the rectifier listed by Tohatsu America (Nissan Marine) for application: 18E2/15D2/9.9D2~ FOR EP, EF



I took your advice and purchased the 3G2760600M part. Where does the black wire coming from the motor go? It has a FEMALE connector. Does it go to the black wire on the rectifier, because it also has a FEMALE connector.
 

roaoro

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I've looked at those diagrams NUMEROUS times since I started this topic. Nowhere does it show a black wire coming from the charging circuit on the motor.
 

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pvanv

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Understand that any single-phase bridge rectifier receives 2 wires as AC input, and then provides rectified DC out. Yellow/white are your AC. Black is common ground. The schematic in the owner's manual doesn't delineate the wire, but shows it capped off in a non-charging setup. Review the attached diagram from the parts catalog:

002-21043-4_FIG17.JPG
 

roaoro

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Thanks for the info and diagrams. It's still not computing in my head. I've hooked the rectifier up as described, grounded the black rectifier wire to the motor. At a fast idle, I get 20-30vdc between the red rectifier wire and the engine block, which seems normal since I assume the rectifier is not regulated. Now, when I connect that mystery black wire that comes from the charging circuit to a ground (engine block), it sparked and the engine stumbled. Am I misunderstanding what you meant by that black alternator wire being common ground? I'll admit, AC voltage confuses the heck out of me compared to DC.
 
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