jcb857 161 #1 Posted June 13, 2011 I tried to run my 857 with the correct k181s motor on it and I can't get any spark threw the spark plug. It has a new spark plug, coil, and battery. When I put every thing back together after I painted it I cleaned all the terminals. I cleaned the points and set the points to .020 gap. The regulater has four terminals and they are all hooked up as they should I think. The motor turns over when I try to start it. I get some volts at the end of the lead that hooks to the top of the coil. I thought that maybe the condenser was not working so I hooked the one from my C-81 and still no spark. I must be missing something. Share this post Link to post Share on other sites
rmaynard 16,333 #2 Posted June 13, 2011 Make sure that all of your grounds are good. 12volts goes to (+) side of coil. (-) side is connected to condenser and points. Condenser has to be grounded. If you painted the engine, I would suspect that it is a grounding problem. Share this post Link to post Share on other sites
jcb857 161 #3 Posted June 13, 2011 That is the same diagram that I went off of. I am going to take all conacts apart and clean them and make sure all grounds are claen and free of paint and dirt be back soon. Share this post Link to post Share on other sites
jcb857 161 #4 Posted June 14, 2011 Checked connections all look good. I wasn't paying attention to what I was holding when I cranked the motor over and it bit me good so I know for fact that it is getting plenty of juice. When I crank it over I am getting three and a half volts out the top of the lead coming off the coil. Share this post Link to post Share on other sites
rmaynard 16,333 #5 Posted June 14, 2011 Where exactly are you getting 3.5 volts? At the (+) terminal? You should be getting whatever the battery voltage is when the key is turned to the run position. Share this post Link to post Share on other sites
jcb857 161 #6 Posted June 14, 2011 I am getting the 3.5 volts at the top of the lead coming off the top of the coil where the spark plug connects. I only get that when I crank the motor over. I don't get any volts on the + side of the coil when the key is in the on position only when I crank the motor over. Do you think I have a bad ignition or and bad regulator . Share this post Link to post Share on other sites
Kelly 1,033 #7 Posted June 14, 2011 When the key is on, you should have 12v on the + side of the coil, if not trace that wire back and see if it has a break or a bad ign. switch. Share this post Link to post Share on other sites
rmaynard 16,333 #8 Posted June 14, 2011 From the top of the coil, 20,000 volts +/- is produced. You can't check it with a normal meter. As I said in my previous post, you should have 12+ volts at the + terminal of the coil with the key turned on. If you don't, you won't get your 20,000 volts out of the top of the coil. I guess in a way you are lucky. Since it's not working right, you didn't fry your meter. Take a wire and connect directly from the (+) terminal of the battery to the (+) terminal of the coil. If it starts, you have a wiring problem or a bad switch. Share this post Link to post Share on other sites
jcb857 161 #9 Posted June 14, 2011 I connected + of battery to + of coil and got the plug to spark. I have all new wires ran so I know they are good so it must be the ignition switch. I went to napa and the only had three prong switches with the letters b, m, and s. I need one with b, I, and s. who sells them. Thanks for all the help. Good thing I don't pay my bills working on garden tractors. Share this post Link to post Share on other sites
jimbotelho 1 #10 Posted June 14, 2011 i JUST WENT THRU THE SAME PROBLEM AFTER i PAINTED A ENGINE CHECKED ALL GROUNDS AND FINALLY FOUND A WIRE THAT PULLED APART FROM THE CONNECTORS CHECK ALL WIRING IT IS THE LITTLE THINGS THAT WOULD NOT BE SUSPECTED JIM BEEN THERE! :WRS: Share this post Link to post Share on other sites
rmaynard 16,333 #11 Posted June 15, 2011 The ignition switch that you need is a high amperage one, since there is no start solenoid on the 857. I'm not sure if NAPA has them, but part number 95521B is a Cole Hersee switch that is a replacement for the Toro 4988 switch. They can be ordered from various online venders. Share this post Link to post Share on other sites
jcb857 161 #12 Posted June 15, 2011 I am putting all these new patrs on and was thinking of puting a new regulator on to. The one on the wiring diagram shows a three terminal regulator. The one that is on it now has three in the front and one in the back. I can't find any part #s in my owners manuals for the regulator to check if it is correct. Does anyone now the correct part # and if there should be three or four teminals? The one on there now has f terminal on regulater going to f terminal on starter/genarator and battery terminal going to battery terminal and L terminal going to lighter and the terminal oon the back going to the a terminal on the starter/generator. Is this correct? Share this post Link to post Share on other sites
