Swimmer 0 #1 Posted October 24 Could any of you tell me where the voltage regulator is on an early 70's 213-8? It looks lie it was up behind fly wheel fan cover, but it may be gone or moved. What amperage should it be? Could you tell me what Kohler PN the muffler is? Your help is greatly appreciated as I am a newbie to the site and this old 312-8 (to plow snow this Winter) Share this post Link to post Share on other sites
gwest_ca-(File Mod) 11,069 #2 Posted October 24 Welcome to the forum. The first 312-8 was the 1985 model. No tractor model and serial number? What are all the numbers off the engine data decal including the Kohler serial number? Share this post Link to post Share on other sites
Handy Don 12,277 #3 Posted October 24 (edited) The 300’s definitely began in the mid-80’s, preceded in the early 80’s by the B and C models. Model numbers are important. Looking at wiring diagram (search on this site for “tractor 312-8” and select “Files” and “Use all my search terms"), it seems the white wire from the engine to the ignition switch carries DC. I doubt there is a regulator--much more likely a simple diode somewhere in that white wire. You can test this with a VOM easily when the engine is running. Edited October 24 by Handy Don Share this post Link to post Share on other sites
Ed Kennell 38,320 #4 Posted October 24 1 hour ago, Swimmer said: early 70's 213-8? Guess we are assuming this is a typo? to the Swimmer. Pictures of the tractor and engine ID plates would help ID your tractor. Share this post Link to post Share on other sites
Swimmer 0 #5 Posted October 24 Yes, typo. It is a 312-8 with a Kohler K301S, spec. no. 47812, serial no. 15076794. I found a better used muffler for it and a older voltage regulator off of another Kohler 12HP engine, but not sure if the regulator is correct. It is about three inches long by 1.5 inches wide and about 3/4 inches deep. It has two attachments flanges on long ends that used with 7/16 inch hex head bolts about 1,25 inches long. It has three flat tabs coming off of it in middle. Your help is much appreciated. Share this post Link to post Share on other sites
gwest_ca-(File Mod) 11,069 #6 Posted October 24 Your tractor is 1985 model 21-12K801 It does not use a voltage regulator. You have two stator windings. One uses a diode to rectify the AC charge current to charge the battery with no regulation. The other AC power goes directly to the light circuit as the lights will operate on AC current. These files come up on a 21-12K801 search https://www.wheelhorseforum.com/search/?q=21-12k801&quick=1&type=downloads_file 2 Share this post Link to post Share on other sites
