![]() #Massey ferguson to 35 spark plug gap pdfFile size 46 Mb PDF document searchable with bookmarks. #Massey ferguson to 35 spark plug gap manualMassey Ferguson T20 TE20 TE-A20 TE-D20 TE-F20 TE-H20 Tractor factory workshop and repair manual on PDF can be viewed using free PDF reader like adobe or foxit or nitro. Crank the engine and see if you see a spark jump between the wire terminal and the plug terminal. When you replaced the coil did you purchase one with an internal resistor? Ferguson ignition systems use ignition coils with internal resistors.Ĭheck the ignition system with a spark tester, or pull off a spark plug wire and prop it about a quarter inch away from the plug terminal. ![]() Sometimes the wire can break just inside the crimp on terminals. Check the wire between the side of the distributor and the coil with a multi-meter. If the insulators are cracked, replace the assembly. Check the side terminal on the distributor to make sure it is not touching the metal housing, and make sure the insulators are intact. Check the point setting, and run a small piece of paper between the contacts to remove any oxide that may have accumulated on them. If the springy center contact is worn or loose replace the rotor. If there are cracks in the cap, corroded terminals or the carbon button is worn, replace the cap. Inspect the distributor cap, particularly the carbon button center contact. Check the terminal ends, and inside the towers. Some additional things to check include the wire going from the center of the distributor cap to the center of the coil. The remaining terminal should be connected to the terminal on the side of the distributor. If your tractor is a 12 volt negative ground system the (+) positive coil terminal should be connected to the wire going to the ignition switch. If your tractor is a 6 volt positive ground system the (-) negative coil terminal should be connected to the wire going to the ignition switch. Yes, the marks on the coil terminals matter. If your starter will not turn over either then it is possible you have a bad ignition switch. If that is true there is probably no problem with your ignition switch. I am assuming the starter turns over, but the engine will not fire. I’m having trouble with the ignition on my TO-35, is the polarity of the coil important? November 5, 2016.
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