pacer 3,176 #1 Posted April 24, 2020 No charge showing on volt meter, and battery weak --- so I unplug the wires from the rectifier and first check for the recommended 30+- voltage coming from the stator and I'm getting 8-10 volts ... aha sez I,theres the problem. This is on a D160 which means I have to completely remove the engine to get to the flywheel. So I do this and get the meter to further diagnose, figuring a wire had broke or ----??? Well the stator cks absolutely dead on by the book, get .01/02 ohms across the 2 leads and zero for grounding out... dead on and its all clean as can be. (like no mouse nests!!) So I put the flywheel back on, pull the spark plug and hook up my big drill motor with a socket and spin it up - this is about 2000rpm so stator should be putting out about 20/24v+- nope, getting the same 8-10v. OK, Ive got another stator that cks out good laying around and I put it on ---- same thing!! So to make sure I'm not losing my mind I've got a MF 1650 with a k341 and I go do a ck on its output and --- yep, 30+- volts. As an aside here I bought this D160 with a grey painted k341 factory Kohler replacement engine (the PO wasnt aware what it was and I sure didnt mention that) and the engine is in EXCELLENT condition which follows through to the flywheel and the stator looking like new. This has me stumped --- anybody got any ideas ----- please.... 1 Share this post Link to post Share on other sites
squonk 42,797 #2 Posted April 24, 2020 Didn't lose any magnets in the flywheel did you? 1 Share this post Link to post Share on other sites
pfrederi 18,385 #3 Posted April 25, 2020 Wish I had a good answer for you . Just went through this with a 10 amp system on a K321. less than 10 volts out of the stator that passed the resistance and short test. Tried a different stator no luck...Swapped out flywheel maybe weak magnets no change. (Kohler does not have a magnet test in the service manual...Tecumseh does...) Finally put in a 15 amp stator and new flywheel works great.... Share this post Link to post Share on other sites
pacer 3,176 #4 Posted April 25, 2020 18 minutes ago, pfrederi said: Finally put in a 15 amp stator and new flywheel works great.... Now you know thats just ------- weird. Im at the point that thats what Im gonna have to try! But, but, but .... that just dont make good sense. As I mentioned this whole motor is CLEAN, the flywheel looks new and so does the stator, the magnets are nice and strong, wires in really good condition And of course the principle of making AC voltage in this manner is so straight forward that .....well, theres just so little can go bad! Share this post Link to post Share on other sites
redone 45 #5 Posted May 4, 2020 I ve threw a situation.on a 20 HP Onan. low votage. pulled flywheel, magnet had come loose from flywheel, it was still attach to the stator.it was charging but very little. re glued back onto flywheel everything works Share this post Link to post Share on other sites
kasey54 305 #6 Posted May 19, 2020 have the magnets been maybe replaced and are not arranged opp polarity , each one? Share this post Link to post Share on other sites
kasey54 305 #7 Posted May 19, 2020 Or possibly wrong right from the factory? Makes no sense otherwise. Ive heard of weak magnets , but never encountered one. Share this post Link to post Share on other sites
kasey54 305 #8 Posted May 19, 2020 Stator coils could be wound wrong, and still have ohm readings proper. Share this post Link to post Share on other sites
kasey54 305 #9 Posted May 19, 2020 To test either of these ideas a compass could be used to check polarity of each magnet. Each magnet should be the opposite polarity from the one next to it, all the way around. To test the stator coil polarity you would need to energize the coils with dc voltage.This should be done taking care to test them quickly, as 12 volts will over heat them quickly. Do one to a time and allow to cool.. One more long shot, if the outside diameter of the stator is much smaller than the inside diameter of the magnets in fly wheel that could be a problem. The clearance between them should be .040 " or less , centered. Perhaps there is a smaller diameter stator that would bolt on. Hope this helps. Share this post Link to post Share on other sites
pacer 3,176 #10 Posted May 19, 2020 This problem has been solved........ One of those strange things that I have NO idea what I did to get it. OK, magnets -- a 2 minute youtube showed how to ck polarity. Take a small magnet (I had a shirt pocket screwdriver with a little mag on end) go to each mag, if sticks to middle then the next one should stick to the edges, alternating around the 6 mags - mine did and were stuck on perfectly. I finally did what Paul in one of the earlier post said he did and got a new/used stator, put it on and ---- same thing, bench test showed 5-6v?? At that point I was getting pretty PO'd and let it sit for several days, had other things had to do. After a few days I decided to put it back together and just keep a trickle charger on the battery (its my trash/brush, etc hauler and not used a lot) So, I reassemble and start it up and ............ SAY WHAT??? its charging like crazy, 13/13.5 v on the V meter. Go figure Share this post Link to post Share on other sites
kasey54 305 #11 Posted May 19, 2020 Thats interesting. I was of the belief you needed 30 ac volts from the stator with regulator unplugged. O K, great. Share this post Link to post Share on other sites
