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Old 09-18-2012, 07:49 PM
Sharpcut 1's Avatar
Sharpcut 1 Sharpcut 1 is offline
LawnSite Senior Member
Join Date: Sep 2006
Location: Roseville, MI
Posts: 450
Take the leads off the voltage regulator, see what AC voltage is. Bet it jumps up to around 35 VAC. Also,unhook 12v wire at rectifier and run a jumper back to the battery temporarily. Let us know what happens. I think you'll find the 12v lead post on your rectifier is slightly black. The regulators are starting to short. If it discharged the battery enough times, you mat also need to replace it. If your #'s go up, try another battery. When properly working on the 850, you should see about 13.9-14.1 volts at full throttle.
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