Snow Removal Rotors ... Toro 2 cycle / NMMA-TCW3 Engine: Engine Speed 3700±150 RPM Engine: Ignition Coil Air Gap ... Engine: Spark Plug NGK BPMR6A Changing the Spark Plug on a Toro Two Stage Snow Blower. Watch our video on how to change the spark plug on a Toro two stage snow blower. Changing the spark plug will increase the efficiency and extend the life of your engine. This video shows you how to easily replace your dirty spark plug with a new one. Page 14: Replacing The Spark Plug Figure 14 Figure 12 1. Spark-plug wire 1. Idler pulley 3. Notch 2. Idler spring 6. Remove the spark plug. 7. Examine the spark plug and replace it if it is cracked, 9. Lift up the idler pulley arm assembly, squeeze the belt fouled, dirty, or if the electrodes are worn.