6. Torque nut to 120-320 in-lbs on magnetos with attached drive gears. Your email address will not be published. When I crank this engine with the timing light connected Im getting a 60 degree advanced spark. Consult Champion Aerospace Manual L-1363, Section 3.3.8. What can I do if my engine runs rough? If youre experiencing this symptom, its important to check the other parts of your ignition system as well. Now its time to learn how to interpret these readings and what they mean. Compare the multimeter reading with the resistance range of your specific magneto model. Either way, the magneto coil needs to be changed. By measuring resistance, its easier to determine the functionality of magneto and the condition of winding and secondary wires in coils. Worn or fouled spark plugs; arcing ignition lead, Inspect and replace or repair as necessary. Always disconnect the spark plug wire and remove the coil from the engine before testing.if(typeof ez_ad_units!='undefined'){ez_ad_units.push([[300,250],'electronicshacks_com-large-mobile-banner-1','ezslot_10',113,'0','0'])};__ez_fad_position('div-gpt-ad-electronicshacks_com-large-mobile-banner-1-0'); The first step is to detach the flywheel shroud. Write down this number for later reference. The conductor is typically made of copper wire, and the magnetic field is provided by a permanent magnet or an electromagnet. If any of these symptoms occur, your mags must be replaced. Lets get started!if(typeof ez_ad_units!='undefined'){ez_ad_units.push([[300,250],'electronicshacks_com-medrectangle-3','ezslot_3',106,'0','0'])};__ez_fad_position('div-gpt-ad-electronicshacks_com-medrectangle-3-0'); The most common use for a magneto coil is in an ignition system, where it is used to create a spark that ignites the fuel in the engine. Performance cookies are used to understand and analyze the key performance indexes of the website which helps in delivering a better user experience for the visitors. Next, we can rule out the source coil since it produces good enough spark to fire the engine even if its way too early. Lack of acceleration as the engine loses power. Pull the starter rope; if you see a bright blue spark jump across the tester window . Magneto coils are used in a variety of applications, including generators and solenoids. lawnmower "stops" running when it's HOT (bad magneto) It comes from electrolytic chemicals burning inside the capacitor. Step 1. Retard contact point circuit inoperative. Plug lead should throw a 3/16-inch spark. As the secondary coil is larger in terms of size and producing current, thats why its resistance is also higher as compared to the primary coil. Compare readings with the recommended range. Arcing ignition wire. A reading outside the 3k to 5k Ohms range means it is faulty. Consult Champion Aerospace Manual L-1363, Section 3.3.3.A. How to Test a Magneto Coil With a Multimeter? No drop-off noted -- open switch connection. Tum engine in proper direction of rotation nation until retard points just open on number one cylinder position. From what I can see online, the pickup coil is fixed in its position and it will not advance timing on its own. This can vary, but most small engines will have a magneto that produces around 50 volts. Use your hand to pull the plastic. Start the engine and the misfiring should disappear.