Fast Eddie 13 #1 Posted May 23 I don't sign in very often but this my goto place for everything Wheel Horse. I've got one now that I can't figure out. I was mowing and all of the indicator lights on the dash came on. I looked down and the volt meter was pegged to the right. I checked the voltage and was getting about 31 volts from the alternator and about 21 on B+ to the negative terminal of the battery. I suspected bad voltage regulator and purchased a new one. I installed it but still have the same problem. Does anyone have any idea of what may be going on? I can still mow with one of my others but this one is my favorite. My 42" rear discharge deck is about as wide as the tractor and I can mow the ditch in front of my house without much trouble. Thanks in advance for any help. Share this post Link to post Share on other sites
HyperPete 787 #2 Posted May 23 You can receive defective parts, new. I don't know how the knowledgeable folks here feel, but in the motorcycle world, converting to a Shindengen Mosfet regulator is a valuable upgrade. They work with 2 wire (single phase) and 3 wire (3 phase) stators. Share this post Link to post Share on other sites
Ed Kennell 41,312 #3 Posted May 23 Is the VR grounded properly? Share this post Link to post Share on other sites
lynnmor 7,703 #4 Posted May 23 Just now, Ed Kennell said: Is the VR grounded properly? Beat me by 2 seconds. Also check engine and battery grounds. 1 Share this post Link to post Share on other sites
Fast Eddie 13 #5 Posted May 23 I would think the new VR could be bad but it's doing exactly the same thing as the one that I took off. I checked case to battery ground and found no resistance. I checked stator to ground and found no short. It really doesn't make sense. I'm pretty sure it's a half wave bridge so the voltage out should be no more that half of the voltage in. I'm at a loss. I may pull a VR from one of my other tractors that I know is good and try that tomorrow. 2 Share this post Link to post Share on other sites
lynnmor 7,703 #6 Posted May 24 Download the Onan Service Manual the information you need starts at page 8-4. It well may be that you have two bad voltage regulators, I have had good luck with the cheap ones on the auction site but it may be just a matter of luck. Share this post Link to post Share on other sites
Fast Eddie 13 #7 Posted May 24 When you guys right, you're right. Pulled a VR from one of my other tractors that I knew worked and everything fell into place. A big thanks to everyone for their help. Share this post Link to post Share on other sites
Bill D 2,208 #8 Posted May 24 If you have a local small engine shop that sells used parts buy a couple of used VR's off Kawasaki FH series engines. The last two 416H's I picked up had bad VR's. I made an adapter plate from some aluminum to mount them on my Onans. Working great so far. OEM quality as well. Share this post Link to post Share on other sites
HyperPete 787 #9 Posted May 24 Shindengen! It's the only best way to fly! Share this post Link to post Share on other sites
