Maxwell-8 4,277 #1 Posted June 7, 2022 (edited) I have this Kohler M16. sweet runner, right on 160psi of compression. It makes AC, but doesn't make DC. That means a bad voltage regulator no? Which one do I need? And can it be my cheapest source asks 150$ for one? Is there pure gold inside them? Edited June 7, 2022 by Maxwell-8 Share this post Link to post Share on other sites
953 nut 55,297 #2 Posted June 7, 2022 (edited) 17 minutes ago, Maxwell-8 said: It makes AC, but doesn't make DC. That means a bad voltage regulator no? With the ignition switch ON and not running do you have 12 volts DC on the center terminal? If you don't have the 12 volts the regulator won't work. Edited June 7, 2022 by 953 nut fat finger 1 1 Share this post Link to post Share on other sites
Achto 27,600 #3 Posted June 8, 2022 3 hours ago, Maxwell-8 said: It makes AC, but doesn't make DC. That means a bad voltage regulator no? Regulator/rectifier diagnostics - First do you have 30+ volts AC from the stator? If yes, then. 1 - Do you have battery voltage to the center or lower terminal of the reg/rec with the key in the "ON" position? 2 - Does the body of your reg/rec have a proper ground? if the above answers are yes then the reg/rec needs to be replaced. 3 hours ago, Maxwell-8 said: And can it be my cheapest source asks 150$ for one? Is there pure gold inside them? There has to be a better source for you. A jungle site add in the US. https://www.amazon.com/Voltage-Regulator-Rectifier-Kohler-10-S/dp/B01K9Y2M3O 1 Share this post Link to post Share on other sites
Maxwell-8 4,277 #4 Posted June 8, 2022 (edited) 3 hours ago, Achto said: Regulator/rectifier diagnostics - First do you have 30+ volts AC from the stator? If yes, then. 1 - Do you have battery voltage to the center or lower terminal of the reg/rec with the key in the "ON" position? 2 - Does the body of your reg/rec have a proper ground? if the above answers are yes then the reg/rec needs to be replaced. There has to be a better source for you. A jungle site add in the US. https://www.amazon.com/Voltage-Regulator-Rectifier-Kohler-10-S/dp/B01K9Y2M3O I have to answer yes on all those questions, I will be ordering one true amazon USA, and import it. Thanks a lot for the info Edited June 8, 2022 by Maxwell-8 1 Share this post Link to post Share on other sites
ranger 1,750 #5 Posted June 8, 2022 (edited) I bought one of the ‘cheepo’ ones off ‘the bay’, for my Raider 10. I am going to mill the fins down and a computer cpu heat sink, clamping the two together using the regulator mounting holes, + thermal grease between. This because these reg’s are meant to be in a forced airflow. Only costs a few £’s, so not much lost if it doesn’t work. (Pics to follow). Doug. pics as promised. Edited June 8, 2022 by ranger 3 Share this post Link to post Share on other sites
Achto 27,600 #6 Posted June 8, 2022 2 hours ago, ranger said: This because these reg’s are meant to be in a forced airflow. Good point, @Maxwell-8 if you current regulator does not mount in a hole in the engine tins then you will want one like this. https://www.amazon.com/DB-Electrical-AKH6000-Rectifier-Regulator/dp/B019DHPMAS/ref=asc_df_B019DHPMAS/?tag=hyprod-20&linkCode=df0&hvadid=167148561991&hvpos=&hvnetw=g&hvrand=11992277148849675379&hvpone=&hvptwo=&hvqmt=&hvdev=c&hvdvcmdl=&hvlocint=&hvlocphy=1028057&hvtargid=pla-307268367982&psc=1 This style is made to be remote mounted. 1 1 Share this post Link to post Share on other sites
peter lena 8,634 #7 Posted June 8, 2022 @Maxwell-8 another often overlooked / related , detail is GROUNDING . have any alligator clip test wires? , go from battery cable ground ,bolt down point , to intended rectifier mounting point , test gain or improvement . if it helps , what I do is add another cable , from battery ground point to engine corner / frame , clutch pedal side , and 10-12 ga wire form there to engine tins , rectifier bolt down point , from there to head lights , increased , verified grounding . my initial results was so solid , did the same thing to my other 2 horses , amperage gauge works like it should , just an idea , pete 1 Share this post Link to post Share on other sites