Hodge71 662 #1 Posted September 26, 2014 As amny know Im redoing a 1996 416 for my Dads 75th birthday in a few weeks. I got the wiring pretty well wrapped up last night and fired it up to see the operation of the new voltage meter and also the hour meter. The voltage meter was reading over 16 volts at high idle...say around 1800-2000 rpm. Is this normal? All my Kohlers charge around 14.5- 15 volts. Now to be fair I didn't run it very long and it has sat for a couple weeks so the battery is definitely less than fully charged. I will try again tomorrow when I have more time to see if it goes back down once it runs longer. I'm not familiar with the Onans so I wasnt sure if this is normal Share this post Link to post Share on other sites
km3h 543 #2 Posted September 26, 2014 Using a meter, measure the voltage at the battery with engine off and then running. The Wheel Horse meter may be out of calibration. 1 Share this post Link to post Share on other sites
Hodge71 662 #3 Posted September 26, 2014 Its not a Wheel Horse meter...its aftermarket and I measured it with the tractor off and running...>According to my Fluke....12.2 volts off...17.1 at fast idle and 15.5 at engine idle ...I would ay the meter I installed is dead on Share this post Link to post Share on other sites
Trouty56 565 #4 Posted September 26, 2014 Jeff....I only owned 1 onan for a short period.....after buying a new aftermarket regulator it was dead on 14.4..... Share this post Link to post Share on other sites
rmaynard 14,866 #5 Posted September 27, 2014 Make sure that the regulator is properly grounded. 2 Share this post Link to post Share on other sites
Hodge71 662 #6 Posted September 27, 2014 Make sure that the regulator is properly grounded. Ok Bob....Wheres the regulator and how do I make sure its grounded correctly? I never touched it...at least Im assuming because I have no idea where it is. The only ground I touched was the main ground wire from the battery to the engine block and I assume that is good as well because the tractor starts with no issue. Share this post Link to post Share on other sites
rmaynard 14,866 #7 Posted September 27, 2014 Since I don't own one, I'm not sure where the regulator is on a 416, but it has to be mounted either to the frame or engine. If it's not a bad ground, it's probably a bad regulator. Share this post Link to post Share on other sites
mike416 14 #8 Posted September 27, 2014 I have a 416H Onan and love it. Facing the flywheel side, the regulator is located on top of the engine shroud on the right hand side (right of the air cleaner). Its a small, rectangular (about 1" x 2") part that has 3 electrical terminals coming out of it. It looks similar to a Kohler command voltage regulator. The two outside terminals are your AC in, and the center terminal is your DC out. Check the DC terminal with your meter (DC terminal to negative on battery) and see what it shows. If its putting out more than say around 14.9 at full throttle, I would think your regulator is bad and is over charging. If you have any concern that the regulator isn't grounding properly, then add a small ground wire from the regulator mount bolt to one of the bolts that hold the cover (metal heat shield) over the engine head on that side. I do not know the exact Onan specs for this application, but my 416 has always made around low 12's at idle and high 14's at full throttle. Hope this helps and Good luck! 2 Share this post Link to post Share on other sites
Martin 2,130 #9 Posted September 27, 2014 (edited) looking at the is pic its right above the fuel pump and just left of the fuses. right on top of the rear cylinder shroud where the red wire is curving around to a terminal........ heres a slightly better pic. the regulator is right at the bottom of the pic.... Edited September 27, 2014 by Martin 1 Share this post Link to post Share on other sites
