Voltage Regulators

[Bob1944]

I have two old engines I am restoring. One is a 63 Evinrude Big Twin 40 hp and the other is a 63 Johnson 75 hp v4. They both have old rusted VR that I doubt work.

I read in the search on VRs that they are not necessary. Is this correct? I have not been able to find them on line, on this site or any other site.

Can I bypass the VR? What does your wisdom suggest?

 

[samo_ott]

Re: Voltage Regulators

If you don't need the charging circuit you can bypass it all. Don't use the charging circuit and bypass the regulator though or you will fry your battery. I have heard that you can sometimes use an auto regulator there but I do not know the details.

 

[F_R]

Re: Voltage Regulators

You don't need the regulator if you don't use the generator. Take the generator off and sell it on e-bay if you don't want it.
The regulators are available from Evinrude/Johnson dealers, part number 383609.

I have heard that NAPA Auto Parts Stores list a VR306 regulator that is about the same thing, for Harley Davidson Motorcycles. I have not confirmed this.

EDIT: You did not say whether either of those motors are electric shift. You do need the generator for those. A weak battery will cause the clutches to slip and then you are looking at big bucks to fix that.

 

[Bob1944]

Re: Voltage Regulators

Thank you for the part number. I could not find that. I need a charging system for lights and GPS/fish finder, radio, etc.

 

[charliedaubitz]

Re: Voltage Regulators

Thank you for the part number. I could not find that. I need a charging system for lights and GPS/fish finder, radio, etc.

I fixed my old 69 regulator that had sat for 30 years by pulling the rusted cover off and cleaning the points on the coil next to the bat terminal, use a ohm meter to check continuity across the points when they are closed by pushing on them with your finger. I guess they oxidize after a few years, I cleaned on mine quite a bit before it would show closed on the meter.
I painted the cover while it was off and now it looks and works like new.

 

[Bob1944]

Re: Voltage Regulators

Thanks, that is great information.