In Reply to: Re: broke 860 posted by Bob Thomas on November 09, 2018 at 09:25:13:
A coil that says "USE WITH EXTERNAL RESISTOR" does go with the ceramic ballast resistor pictured above. They do make those ballast resistors with several different ratings. Some high performance engines used lower resistance to get hotter spark at high RPM. These tractors are low RPM engines, so a resistor rated around 1.5 ohms should work fine with a coil that says "USE WITH EXTERNAL RESISTOR".