It all depends on the color of the smoke. If the plug looks oily and wet, change it and see if that changes the smoking condition.
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.
If you put it in for engine oil you will have a major problem. If you put it in with the fuel then you will notice the mower smoking a lot and possibly fouling the spark plug.
how to replace plug wire on a toro mower
what is the spark plug setting for 7hp self prepelled troy bilt mower
The spark plugs on push mowers are usually easy to access - in many cases, you just remove the wire from the top of the spark plug, unscrew the spark plug, put the new one in, and cap it off with the wire again.
Yes
what spark plug do i need for a 3.75
Buy a plug wrench.
A good lawn mower spark plug will have just a small amount of brown deposit. In addition, the gap will be very close.
I own a John Deere 1458 mower and it takes an NGK plug #BPR5ES.
Would you use lawn mower plugs in your car?? NO!!!!
John Deere L100 needs this spark plug. (Champion J8) - AP19170.