Changing Spark Plugs - Toro 73542 Operator's Manual

11. Slowly add additional oil to bring the oil level to the
full mark on the dipstick.
Important Overfilling the crankcase with oil may
cause engine damage.
Changing the Engine Oil Filter
1. Drain the oil from the engine; refer to Changing Oil,
page 22, steps 1 through 8.
2. Remove the old filter (Fig. 29).
1
Figure 29
1. Oil filter
2. Gasket
3. Wipe the filter adapter gasket surface (Fig. 29).
4. Apply a thin coat of new oil to the rubber gasket on
the replacement filter (Fig. 29).
5. Install the replacement oil filter to the filter adapter.
Turn the oil filter clockwise until the rubber gasket
contacts the filter adapter, then tighten the filter an
additional 1/2 turn (Fig. 29).
6. Fill the crankcase with the correct type of new oil;
refer to Changing Oil, page 22, steps 9 through 11.
7. Dispose of the used oil filter at a certified recycling
center.

Changing Spark Plugs

Change the spark plugs after every 200 operating hours.
Make sure the air gap between the center and side
electrodes is correct before installing the spark plugs. Use
3
2
1256
3. Adapter
23
a spark plug wrench for removing and installing the spark
plugs and a gapping tool/feeler gauge to check and adjust
the air gap.
Type: Champion RC-12YC (or equivalent)
Air Gap: 0.030" (0.76 mm)
Removing the Spark Plug
1. Disengage the PTO, set the parking brake, lower the
attachment lift, stop the engine, and remove the
ignition key.
2. Open the hood.
3. Pull the wires off the spark plugs (Fig. 30).
4. Clean around the spark plugs to prevent dirt from
falling into the engine and potentially causing damage.
5. Remove the spark plugs and metal washers.
2
1
Figure 30
1. Spark plug wire
Checking the Spark Plugs
1. Look at the center of the spark plugs (Fig. 31).
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.
Important Do not clean the spark plugs. Always
replace a spark plug when it has a black coating, worn
electrodes, an oily film, or cracks.
m–3246
2. Spark plug