You can easily test the coil with a multimeter. The John Deere 110 was produced from 1963 to 1974. Here’s a better ignition coil test. A good coil will range from 7,000 to 10,000 Ohms of resistance. The remaining terminal should be connected to the terminal on the side of the distributor. 960 discussion in the Ford forum at Yesterday's Tractors. Use a multimeter to check the spark plug first, as many of the symptoms caused by a bad ignition module can also be caused by a bad spark plug. Testing the Coil or Armature Clip one end of the spark tester (service part number 19368) to the ignition cable and the other grounded to the cylinder head Testing the Coil or Armature. Usual failures are distributor cap/rotor, coil, or the air gap between the module face and inductor ring is under .010 or over .060 inch. By Will Charpentier . If a spark is present, the ignition coil is working properly. Mike Ignition Coil: The ignition coil is probably the easiest thing to check and therefore the first thing to check when embarking upon ignition system troubleshooting. have Delco Remy ignition systems using ignition coils with built-in resistors. The module is mounted with 2 screws to the engine block. The resistance values should be something like, Primary winding .3 to 1 ohms, Secondary winding 8,000 to 11,500 ohms. The ignition coil produces the energy that creates the spark at the spark plug. How to Check Out Tractor Ignition Coils. Virtually all vehicles manufactured today use ignition coils to provide the spark for the engine’s spark plugs.An ignition coil is an inductive coil that is a part of the vehicle’s secondary ignition system. Watch the spark tester or spark plug, looking for a spark between the electrodes of the tester or spark plug. It's impractical to uncover the coil and examine the wire; fortunately, there's an easier way to find a break -- a continuity test. In this step-by-step guide, we will go over how to test if an ignition coil is good or bad, by testing the resistance using a digital multimeter. If not, it's likely the ignition coil isn't working. What most boaters do have is a digital multimeter. Most boaters don't have the equipment a professional has to test the coils on a Johnson outboard motor. A "real" coil tester does it better "Typical" not all and the answer depends on the coil voltage etc: LV primary winding between little + and - terminals may be in the 1 to 4 ohms range (say 1.5 to 3 ohms on many, depends if for 6 or 12 volt use) HV Secondary may be in the 4,000 to 10,000 ohms range IF EITHER IS OPEN ITS A BAD COIL although many coils will test good for the above but … ... Online, I would check on eBay or a tractor parts company with vintage tractor parts. In this test we are testing for internal shorts or high resistance that will prevent the coil from putting out it's 20,000 volt secondary spark. Most of that is being dissipated by the resistor. Check the ignition coil secondary coil resistance by connecting an ohmmeter between the coil output terminal and the ignition coil negative terminal. Testing the Coil or Armature Clip one end of the spark tester (service part number 19368) to the ignition cable and the other grounded to the cylinder head The ignition system in a lawn tractor includes the ignition switch, battery, spark plug or plugs, and the ignition module. Distributor cap and rotor, and the coil are checked same as the conventional points type ignition. 1. To test most any coil, you'll need to "pulse" it with a battery. Remove the ground wire from the coil. Most Ford tractors Ford 9N, 2N, 8N, NAA, etc. Testing the coil for shorted to ground. Set your meter to ohms, and test across the primary winding (small terminals). 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