You pull the ruber boot off the top of the spark plug , take the plug out, put boot back on the plug, touch steel part of the plug to steel on motor,pull motor over while watching the gap on the plug if you see spark it should be ok if no spark do the same with a spark plug you know is good to make sure it is the plug.
Hope this helps
how to replace plug wire on a toro mower
Would you use lawn mower plugs in your car?? NO!!!!
A good lawn mower spark plug will have just a small amount of brown deposit. In addition, the gap will be very close.
Buy a plug wrench.
what spark plug do i need for a 3.75
What is the gap on the spark plug on a Brigg's stratton lawn mower Model#31P777 Type 0348E1?
.030
.024-.028
In order to change the spark plug wires in a Toro lawn mower, the engine housing should be removed. The spark plug wire will then be disconnected which is a simple twisting movement under pressure. This is a very quick procedure.
The spark plug gap for a Murray 12 hp riding lawn mower should be set at .020 inches. This is equal to .5 mm.
NO, lawn mower spark plugs and a car's spark plug are different lengths, heat range and gap. Even if it fits the threads for the hole you run a high risk of causing major damage to the engine.
The spark plug gap for 2 cycle lawnboys is 0.025