Although different coils are capable of different voltages a high tension coil will only produce the voltage it must develop to get to ground be it across the plug gap, or past the insulation to some other ground. Thats why one should never crank an engine with the plug wires disconnected, be it a car engine or a lawn mower as the coil can destroy itself building voltage trying to get to ground, some rather quickly, Honda small engines are particularly bad about that. Some magneto actually have a internal protection that allows too high a voltage to arc to ground. To answer your question yes, reducing plug gap reduces the voltage required but you have other issues or bad coils.
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Today's Featured Article - Tractor Profile: Oliver 70 Row Crop - by Staff. The Oliver 70 was part of the "Fleetline Series" and was manufacturered from 1937 to 1948. The row-crop configuration could have either dual or single front wheels. The Oliver 70 was also offered in the standard, orchard and industrial configurations. The tractors were sold in Canada. An early advertisement states "Power when you want it - power when you need it - power to help put in crops when field conditions are right and time and help are limited. That's the power you'll find in an Oliv
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