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#1
08-24-2015, 11:40 AM
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Briggs & Stratton 16hp engine.
I have a cub cadet 1440 with a 16hp briggs engine model 303447-0447-01 and i am having the amp light come on when the tractor is off and it wont charge the battery. I tested the two leads coming from the engine and was getting 28-31 volts at full throttle which i presume was 3600 rps. I get the same voltage that the battery is putting out when i test from the positive terminal on the battery to the red wire going to the V/R. So i purchased a new V/R part # 845907 and it still will not charge the battery. Could my new V/R be bad? Or is there something that i am missing that could prevent the battery from charging? the two safety switches are disconnected under the seat and the PTO switch has been bypassed and a switch put in place by the PO. I was getting between 6-8 volts on the old V/R but on the new one i am getting 0. thanks
J. 
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#2
08-24-2015, 01:06 PM
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28 AC volts, measured between the 2 stator output leads @ full rpm is good.
About 14V DC from center lead on Reg to ground is good @ full rpm. And same reading between + and - of battery is good, again @ full rpm. If not getting 14V @ battery but @ reg could be wiring problem or Ign sw connectors which are a known problem. 
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#3
08-24-2015, 09:06 PM
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I only got battery voltage when I went from the positive battery terminal to the red wire coming out of the V/R. I was getting nothing out of the new regulator. Even when I checked voltage on it coming out at full throttle there was no voltage. I was able to get a few volts out of the old one. So I'm guessing the new regulator was bad. Will do more tests when abother VR comes.
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#4
08-24-2015, 09:29 PM
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#5
08-27-2015, 05:51 PM
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Ok so I have gone thru all the wiring and fixed and cleaned everything that was corroded. I seem to intermittently get 20-30 volts AC out of my Alt on the engine. A few times I have gotten 29-31 but today after I cleaned all the contacts on the key switch and wired the pto Switch correctly as the PO messed it up. But this afternoon I was not even getting 20 VAC out of the alt on the engine. So that should be fun to pull apart. Anyone know if that is the problem?
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#6
08-28-2015, 04:27 PM
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My multimeter had a bad battery in it. Just double checked the alt and I am getting 31VAC. But I have gone thru two VRs and it still isn't putting out any voltage. I even ran a grounding strap from one of the bolts holding the VR on to the battery ground. Is their anything that could prevent this VR from charging?
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