Get a spark plug socket and wrench that fits the plug body and remove it by turning counter-clockwise.
how to replace plug wire on a toro mower
Before working on the Toro model 20017 lawnmower, disconnect the spark plug. The drive belt is visible under the mover. Use a ratchet to remove the blade. The drive belt is now accessible and can be easily changed.
The spark plug may be fouled. Remove the plug and check to see if it needs to be replaced.
You have to remove the top plastic cover. There are screw heads inside the the propeller area and then two on each side. You will have to remove the gas cap also to get the cowl or cover off. You will be able to see and remove the spark plug.
.032
Champion RJ18Y
.030
Champion RJ19LM will work.
plug gap for toro ccr 3650 is .025
i need a model number for the engine of a toro zmaster model # 78491
Autolite lists it as 2976 or SE2976DPT. I haven't installed the plug yet so I can verify.
Tecumseh Part #611049 - Champion Spark Plug #RCJ8Y