A fuel and air mixture that is too rich is another cause of incomplete combustion. If the carburetor sprays too much fuel into the combustion chamber, the fuel burns cooler. The smoke that results fouls the plug as well as the air filter and the spark arrestor that covers the engine's exhaust port.
Also to know is, why does my lawn mower spark plug turn black?
A black, feathery carbon deposit on your spark plugs can be an indication of a weak spark or an overly rich fuel mixture. Causes may include a stuck choke, misadjusted or heavy carburetor float, a leaky injector or carburetor needle valve, low coil output or high resistance in your spark plug wires.
Hereof, why do spark plugs foul quickly? If the PCV valve is stuck open, the excess vapors and oil droplets can quickly foul the spark plugs. A failed turbocharger can be another source of spark plug oil fouling. ... The main culprit in these problems is vacuum generated in the cylinders that sucks engine oil past the rings and into the combustion chamber.
For optimum performance, your spark plugs should be clean with no damage to the electrodes. If your spark plugs become dirty or fouled, it can affect how your engine runs. A fouled spark plug is a plug that has become covered with a substance like oil, fuel or carbon or one that is blistered from running too hot.
Black, dry soot on the electrodes and insulator tip indicates a carbon-fouled plug. This can be caused by a dirty air filter, excessive driving at low speeds, too rich of a fuel/air mixture or idling your vehicle for too long.
Technically, yes, you can clean spark plugs, however, in most cases it's not worth it. We do not recommend it for a number of reasons. Ultimately, you won't get the same performance from a cleaned plug as from a new plug. Electricity discharges best from sharp edges.
Using WD-40 to repel water from spark plugs, distributors, alternators, and batteries is a good way to prevent corrosion and keep moisture away. You can also use it to ease the removal of spark plugs, especially if there is any rust or corrosion.
The spark plug firing end temperature must be kept low enough to prevent pre-ignition, but high enough to prevent fouling. This is called “thermal performance,” and is determined by the heat range selected.
For the optimal functioning of your lawn mower, the spark plug has to be in good condition – which means it must not be wet. If you notice that it is wet, you can take various steps to correct the problem, or you can choose to replace the plug itself so that it does not lead to lasting system damage.
Warm up your engine – If you typically drive only short distances, give your engine some time to warm up hitting the road. When the engine works at optimal temperatures, it helps in preventing carbon buildup at your spark plugs.Share to:FacebookTwitterPinterestEmail