1985 15 HP With electrical output for lights, how do I hook them up?

[BigB9k]

I have an 85 15 HP that has a small electrical plug on the side, I can only assume this is for lights.
I don't think its for battery charging as it doesn't have a starter.

I can send pictures if needed.

Anywho, has 3 yellow wires running into the plug on the engine side.
After I get a pig-tail, how do I hook the lights up?

 

[F_R]

No Title

Like this:

 

[Vic.S]

And if you want to use the electrical output for battery charging you need the charging kit ( basically a plug, some wiring and a rectifier)

Alternatively you could install a round 4 wire rectifier under the cowl like the electric start models have

or you could biuld yourself a 3 phase rectifier with 6 suitably rated diodes

 

[F_R]

No Title

A 3-phase rectifier

 

[BigB9k]

Ah, so the 6 diodes keep the voltage going one way.
Is this something that is purchased, or made?

 

[ondarvr]

Or, for $5.00 you can buy a rectifier at Radio Shack.

 

[F_R]

Ah, so the 6 diodes keep the voltage going one way.
Is this something that is purchased, or made?

http://www.iboats.com/mall/partfind...gd_poid=109228&gd_row=22&session_id=140927458

But it isn't a "regulator", just a 3-phase rectifier

 

[BigB9k]

Or, for $5.00 you can buy a rectifier at Radio Shack.

Tell me more...

 

[BigB9k]

So the body of F_R's posted regulator goes to ground?

 

[ondarvr]

Tell me more...

part #2761185. $4.49

 

[Vic.S]

Or, for $5.00 you can buy a rectifier at Radio Shack.

Tell me more...

part #2761185. $4.49

But that,s not a 3 phase rectifier ......... just an ordinary single phase bridge rectifier . No good for this application .

 

[ondarvr]

But that,s not a 3 phase rectifier ......... just an ordinary single phase bridge rectifier . No good for this application .

Please explain, I use these any time I add a charging system to a small motor, or when replacing a rectifier in an unregulated system. If a stock 4 wire rectifier will work this one should too.

 

[gm280]

If there are three output wires coming from the stator, then you will need a three phase rectifier (if you want all three outputs to be used) or a simple bridge rectifier and two more directional diodes. However, they do sell three phase rectifiers and are not very expensive as well. I would buy a voltage regulator if I wanted to charge the battery. That way you know you would not over charge the battery. You could still use that setup to run lights as well. Easy Peasy.

 

[ondarvr]

Still not clear, this rectifier has 4 posts just like the stock one.

 

[gm280]

Still not clear, this rectifier has 4 posts just like the stock one.

Yes there are four posts, three AC inputs and one DC output. The case makes the ground. So it is actually a five wire setup.

 

[ondarvr]

I went out and looked at my spare in the package, it has 2 AC posts, 1 + and 1 -, so this exact one may not work.

 

[Vic.S]

I went out and looked at my spare in the package, it has 2 AC posts, 1 + and 1 -, so this exact one may not work.

Quite

Quite. It needs three AC input connections, to which the three yellow wires from the stator are connected, well as the positive and negative outputs.
The common round 4 wire rectifier uses the case as the negative

For those engines that use a 3 wire rectifier the bridge rectifier in your earlier link will be suitable. The negative will have to be separately grounded whereas the 3 wire rectifier , like the 4 wire rectifier, uses the case as the negative connection.

 

[F_R]

No Title

A Bridge Rectifier (like the Radio Shack one). Note four diodes, vs six diodes in the 3-phase rectifier. And two yellow wires from stator, vs three.