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Tractorholic
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42 Posts
Discussion Starter · #1 ·
Hey Guys,
I have a question:
Has anyone ever seen a MF16 voltage regulator produce a -3 vlots off the batt terminal? The engine is the Kohler K341. The Voltage Regulator is a new unit (not Kohler genuine parts). I have confirmed the stator output varies with engine rpm up to 29VAC as it should. I have even tried a different brand (I think it was JD) and had no luck.

Any thoughts....could I be missing something?

Thanks
Steve
 

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Red Tractor Nut & Diesel Addict
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32,409 Posts
If the voltage regulator isn't grounded, it will not do it's thing. They ground through the mounting bolt, so be sure to scrape the paint to get a good ground. Another good idea is to use the toothed lock washers. They will bite right through paint to get the ground.
 

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Connoisseur of Rusty Junk
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5,623 Posts
You can always attach a ground directly too by running a wire from the ground terminal of the battery to a ring terminal that is mounted with the regulator mounting screw. Some of the newer Kohlers with plastic shrouds use this method.
 

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Tractorholic
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42 Posts
Discussion Starter · #4 ·
Thanks for the tips guys. I took an alligator clip jumper wire from the aluminum housing portion of the regulator to the neg terminal of the battery...and ohmed it out with a meter to double check the connection. The AC wires are attached to the AC spades. With the engine at idle I am reading -1 volt at the BATT termainl, when I throddle up it will change to -3volts. Red + meter lead on Batt and Black - lead on the battery.

Typically, I would think the regulator is bad, but in this case, I have tried 3 used and 2 new regulators....could I really have 5 bad regulators.....even if they are not the OEM replacement?? They all came off a K341....

This thing seems very simple but its beatin me up!
 

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Red Tractor Nut & Diesel Addict
Joined
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32,409 Posts
I'm thinking you need to flip the leads on your meter. I would set your meter to DC, then check voltage at battery to see if it rises when you go full throttle. If voltage rises 1 or more volts DC, then aqll is good.
 
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