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4

There are some advantages to having a smaller, thinner electrode, in that it reduces something called the quenching effect. This is when the heat from the spark is partly absorbed by the electrodes, reducing the effectiveness of the spark. However for the same reason, thinner electrodes also can't conduct away heat as well, so they tend to erode faster. ...


3

Some four-stroke engines did have wasted spark ignition. The basic advantage was not needing a distributor, which was one of the less reliable parts of the ignition system. Wasted spark systems were used long before plug-top coil packs came into common use. The reliability issues are not so important with modern ignition components. Wasted spark ignition ...


3

I think there is some misunderstanding here; it is not true that spark plugs fire in pairs on all four-stroke engines (unless the head design incorporates two spark plugs for each cylinder). You're probably thinking of a two-stroke engine in which the power stroke is the only stroke responsible for moving the piston down. Consider the GIF animation below ...


2

I'm sorry if this ends up being a lengthy answer. The answer to this question is more historical than anything else but first a little background. In a waist spark system an ignition coil has two spark plug outputs unlike every other system only having one. Each ignition coil is hooked up to two spark plugs. These spark plugs reside in two opposing ...


1

tl dr: You've hurt nothing by putting more than a little bit of grease in the boot ... don't worry about it. Dielectric grease serves two purposes: Prevent electrical leakage Keep the boot from sticking to the porcelain of the spark plug According to Wikipedia: Dielectric grease is electrically insulating and does not break down when high voltage is ...


1

Unscrew the spark plug, and touch the edge of the plug where the thread is to the metal engine block somewhere near where the plug is threaded into the engine. Make sure you don't have gas fumes everywhere. Hold on to the plug via the insulated wire, so you don't get shocked. Make sure to keep the plug threads touching the engine, and the center electrode ...



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