- May 5, 2017
You are correct. htown16, note that the OP states he has a magneto ignition system. These require the reduced spark plug gap, due to their relatively poor ignition performance at kick start engine speeds. So for him, using a resistor plug could very well be an issue. Using a resistor spark plug on CDI ignitions, where one is not specified may also cause issues. It's not really a big deal on a Kettering [aka points and condenser] ignition or an inductance electronic ignition system, unless you have a failing ignition coil.FWIW - there is no "hotter" or "more powerful" spark. The spark delivered is whatever it takes to jump the gap, which varies with engine load. IOW, if you have an ignition system that is capable of delivering, say, 50k volts, and it takes 15k volts to jump the gap, 15k volts is the "spark" that is delivered. IF there is enough voltage to jump the gap, the "extra" voltage does nothing to "increase" the power/heat of the spark. What a higher voltage secondary DOES do is allow the spark to jump larger gaps which reduces maintenance, increases the ability to fire though fouling, and allows a larger gap to be run.
Let's say you are running suppression wires AND suppression plugs. If the system can generate the spark to jump the gap at all phase of engine load, then replacing the wires/plugs (both or either) with non-suppressed components will make absolutely no difference.