Champion RJ18Y
how to replace plug wire on a toro mower
.030
Tecumseh Part #611049 - Champion Spark Plug #RCJ8Y
Champion RJ19LM will work.
Get a spark plug socket and wrench that fits the plug body and remove it by turning counter-clockwise.
The correct plug gap for my Toro GTS 6.5 horse mower is 0.035
Autolite 458
.025
The spark-plug gap for a toro 6.5 hp self paced walk behind lawnmower is a 0.035 spark plug. You can easily find nice spark-plugs for sale on sites such as eBay.
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.
.30 gap
You will need to get the spark plug from the manufacturer. You can find out this information by calling them or looking through the users manual.