Would you use lawn mower plugs in your car?? NO!!!!
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.
a 5/8 socket
A Champion CJ8Y or J19LM will perform fine
You could try cleaning the spark plug. That worked for us. Take the spark plug out with a wrench and use sandpaper to clean it.
try spraying some wd-40 where it screws in and let it sit for a day. then see if it will come out
I am asking the question. So there is no point in asking me to answer the question if I do not know the answer.
If you mean that the wire came out of the boot, then pull the boot off of the spark plug and use a spark plug socket to remove the spark plug.
Remove the spark plug wires from the spark plugs, use an extension for your Allen wrench, and use a spark plug socket to remove the spark plug.
The best way is to use the spark plug socket out of the factory tool kit. If you do not have that use a normal 5/8" socket to loosen the spark plug. Use the spark plug wire to snap back on after the plug is loose and pull it out. The spark plug is at the very top of the engine, the spark plug wire is a real good indicator of its location.
To Determine what spark plug is in your 16hp enging you would need to be more specific. It could have a Briggs and Stratton engine or it could have a Kohler engine. Both engines use different spark plugs. The spark plug for the Kohler engine is part number 32295-1. The part number for the B&S engine is 43591-7
use the spark plug wrench and use used mirror to find the rear spark plug, you need to two person to do this, then fell the spark plug rear with your hands then apply the spark wrench to remove the old spark plug.