Changing The Spark Plugs - Toro 41188 Operator's Manual

Important: Overfilling the crankcase with oil may
cause engine damage.
Changing the Engine Oil Filter
Service Interval: Every 100 hours
1. Drain the oil from the engine; refer to
Engine Oil (page 40).
2. Remove the oil filter
3. Wipe the filter adapter gasket surface.
4. Apply a thin coat of new oil to the rubber gasket on
the replacement filter.
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
6. Fill the crankcase with the correct type of new oil; refer
to Changing the Engine Oil (page
10.
7. Dispose of the used oil filter at a certified recycling
center.

Changing the Spark Plugs

Service Interval: Every 200 hours
Type: Champion RC-12YC (or equivalent)
Air Gap: 0.76 mm ( 0.030 inch)
Make sure that the air gap between the center and side
electrodes is correct before installing the spark plugs. Use a
spark plug wrench for removing and installing the spark plugs
and a gapping tool/feeler gauge to check and adjust the air
gap.
Removing the Spark Plug
1. Set the parking brake, stop the pump, stop the engine,
and remove the ignition key.
2. Release the latch on the back of the seat and lift the
seat forward.
3. Pull the wires off the spark plugs
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.
Changing the
(Figure 29).
(Figure 29).
40), steps 8
(Figure 30).
1. Spark plug wire
Checking the Spark Plugs
through
1. Look at the center of the spark plugs
If you see a light brown or gray coating 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.
2. Check the gap between the center and side electrodes
(Figure
not correct.
1. Center electrode insulator
2. Side electrode
Installing the Spark Plugs
1. Install the spark plugs and metal washers.
2. Tighten the spark plugs to 24.4 to 29.8 N-m (18 to 22
ft-lb).
3. Push the wires onto the spark plugs
4. Close and latch the seat.
41
Figure 30
2. Spark plug
31) and bend the side electrode, if the gap is
Figure 31
3. Air gap (not to scale)
(Figure 31).
(Figure 30).