Yes you can use a CJ8 for a CJ8Y, but you cannot use a CJ8Y for a CJ8......the CJ8Y has about 1/4in more thread.
Champion CJ8
Champion CJ8 is most popular
A Champion CJ8Y or J19LM will perform fine
No, you cannot directly replace a CJ7Y spark plug with a CJ8 spark plug. The CJ7Y and CJ8 are different spark plug models with variations in heat range, thread size, and reach. Using an incompatible spark plug can lead to improper combustion, engine misfires, and potential damage to the engine. It is crucial to use the correct spark plug recommended by the manufacturer for optimal engine performance.
You can use the following plugs for a cross reference for a Champion CJ8 Denso - W20M-U NGK - BM7A or BM6A (BM6A is a hotter plug than the BM7A) Bosch - WS9EC Autolite Part # 255
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.
A CJ8 Champion plug can be used with a 1974 lawn tractor that uses unleaded gas, however, it would be better to go with a hotter plug. The hotter plugs will keep the tractor running longer without needing to replace the plug sooner than expected.
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.
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.
.044 is the spec, i suggest use KNG spark plug brand .044 is the spec, i suggest use KNG spark plug brand
you must take the top module off the engine and then remove the rubber plugs that are on top of the spark plug, then use the spark plug sockets to get them out you must take the top module off the engine and then remove the rubber plugs that are on top of the spark plug, then use the spark plug sockets to get them out you must take the top module off the engine and then remove the rubber plugs that are on top of the spark plug, then use the spark plug sockets to get them out