jonw440 196 #1 Posted July 27, 2021 (edited) Yesterday I put the battery on a charger and was at 100%. Ran tractor a while and found starting slower and slower. The last time I got it started I saw the AMP meter was around neutral and when I put the lights on it went in to the negative side. (At full throttle) I checked the batter voltage when its running at 3/4 throttle(full throttle made no difference) and it's 12.4 V. I pulled the plug from the rectifier and got 38.8 V DC from the Stator side. Does this mean the regulator is bad? If so can I repair it or pick up a used one? ($144.00 for a OEM TORO part) Edited July 27, 2021 by jonw440 Share this post Link to post Share on other sites
oldredrider 2,553 #2 Posted July 27, 2021 You need to read AC volts from the stator, not DC. Recheck and report back. Also, make sure your regulator is grounded well. Read DC voltage output from the regulator. Let us know. Share this post Link to post Share on other sites
jonw440 196 #3 Posted July 27, 2021 Thanks Paul, Will do in the morning and report back. Share this post Link to post Share on other sites
Achto 29,229 #4 Posted July 27, 2021 (edited) 10 hours ago, jonw440 said: ($144.00 for a OEM TORO part) I have had good luck with the after market ones from here. About 1/2 the price. http://www.psep.biz/store/kohler_voltage_regulator.htm Edited July 27, 2021 by Achto Share this post Link to post Share on other sites
jonw440 196 #5 Posted July 27, 2021 Regulator unplugged I got 30vAC at half throttle. Cleaned ground still not charging. Share this post Link to post Share on other sites
Achto 29,229 #6 Posted July 27, 2021 12 minutes ago, jonw440 said: Regulator unplugged I got 30vAC at half throttle. Cleaned ground still not charging. Sounds like it is time for a new regulator/ rectifier. Share this post Link to post Share on other sites
gwest_ca-(File Mod) 11,390 #7 Posted July 27, 2021 Turn key to RUN with the engine NOT running. Measure voltage across the battery posts. Move red test lead to measure voltage at the DC+ terminal on the regulator. Should have the same reading. If not the charge current can not get to the battery through the ignition switch. 1 Share this post Link to post Share on other sites
jonw440 196 #8 Posted July 27, 2021 (edited) Success! I checked the B+ and had 0 VDC. I checked the PTO switch and 0 VDC. I then checked at fuse before AMMETER and had 12.5V. I then remembered there were to wires dangling near the gas tank and put a jumper wire between and all came alive. Started tractor and 14.6V at battery!! Those must be the seat switch wires previous owner must have unplugged them. Moral of story "CHECK ALL WIRES BEFORE ANYTHING" Edited July 27, 2021 by jonw440 1 Share this post Link to post Share on other sites
pacer 3,176 #9 Posted July 27, 2021 This post reminds me of an incident a couple weeks ago re not charging, and the importance of grounding. I was on my D200 mowing and noticed the VOLT METER (you should get one!) sitting at about 12.2V when normally it reads 13-15. So I finish mowing and go to the shop and a quick inspection showed nothing. Ckd rectifier output and get correct readings (Stators rarely fail, but the rectifiers will occasionally) So, on another visual insp, wasnt finding anything -- but I did notice a - very - slight bit of corrosion at the neg batt post- just a hint of green. So I disconnect and give it a good wire brushing and reinstall ---- Voila! that was it! Theres a post almost every day about (not) charging and the most common responses are -- CHECK YOUR GROUNDS!! and its definitely good advice! Share this post Link to post Share on other sites
