Servicing The Spark Plug; Cleaning The Blower Housing - Toro 74833 Operator's Manual

Note: Ensure the oil filter gasket touches the engine
and then an extra 3/4 turn is completed.
3. Fill the crankcase with the proper type of new oil;
refer to Changing the Oil.

Servicing the Spark Plug

Service Interval: Every 200 hours—Check spark
plug(s) condition and gap.
Every 500 hours—Replace the spark
plug(s).
The spark plug is RFI compliant. Equivalent alternate
brand plugs can also be used. Spark plug replacement is
recommended at 500 hours.
Type: Champion XC12YC (or equivalent)
Air Gap: 0.030 inch (0.76 mm)
Removing the Spark Plug
1. Disengage the blade control switch (PTO), move the
motion control levers to the neutral lock position
and set the parking brake.
2. Stop the engine, remove the key, and wait for all
moving parts to stop before leaving the operating
position.
G010230
Checking the Spark Plug
Important: Never clean the spark plug(s). Always
replace the spark plug(s) when it has: a black
coating, worn electrodes, an oily film, or cracks.
If you see light brown or gray on the insulator, the
engine is operating properly. A black coating on the
insulator usually means the air cleaner is dirty.
Figure 38
Set the gap to 0.030 inches (0.76 mm).
1
Installing the Spark Plug
Tighten the spark plug to 18-22 ft-lb (25-29 N-m).
18-22 ft-lb
25-29 N-m

Cleaning the Blower Housing

To ensure proper cooling, make sure the grass screen,
cooling fins, and other external surfaces of the engine
are kept clean at all times.
Annually or every 100 hours of operation (more often
under extremely dusty, dirty conditions), remove the
blower housing and any other cooling shrouds. Clean
the cooling fins and external surfaces as necessary. Make
sure the cooling shrouds are reinstalled. Torque the
blower housing screws to 5.5 ft-lb (7.5 N-m).
Important: Operating the engine with a blocked
grass screen, dirty or plugged cooling fins, and/or
cooling shrouds removed, will cause engine damage
due to overheating.
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2
G008794
Figure 39
G010339
Figure 40