27
Type: Champion
RC12YC or Champion
Premium Gold
2071 (or equivalent)
Air Gap: 0.040 in. (1.00 mm)
Removing the Spark Plug
(s)
1. Disengage the power take off (PTO), set the parking
brake, and turn the ignition key to “OFF” to stop the
engine. Remove the key.
2. Pull the wire(s) off the spark plug(s) (Fig. 24). Now
clean around the spark plug(s) to prevent dirt from
falling into the engine and potentially causing damage.
3. Remove the spark plug(s) and metal washer.
2
1
m–4757
Figure 24
1.
Spark plug wire
2.
Spark plug
Checking the Spark Plug
1. Look at the center of the spark plug(s) (Fig. 25). 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
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.
2. Check the gap between the center and side electrodes
(Fig. 25). Bend the side electrode (Fig. 25) if the gap is
not correct.
0.040 in.
(1.02 mm)
2
3
1
Figure 25
1.
Center electrode insulator
2.
Side electrode
3.
Air gap (not to scale)
Installing the Spark Plug
(s)
1. Install the spark plug(s) and metal washer. Make sure
the air gap is set correctly.
2. Tighten the spark plug(s) to 20 ft-lb (27 N.m).
3. Push the wire(s) onto the spark plug(s) (Fig. 24).
Greasing and Lubrication
Service Interval/Specification
Refer to the CHECK SERVICE REFERENCE AID decal
for location and interval of greasing and lubrication
(Fig. 26).
Grease with No. 2 general purpose lithium base or
molybdenum base grease.
How to Grease
1. Disengage the power take off (PTO), chock or block
tires, and turn the ignition key to “OFF” to stop the
engine. Remove the key.
2. Clean the grease fittings with a rag. Make sure to
scrape any paint off the front of the fitting(s).
3. Connect a grease gun to the fitting. Pump grease into
the fittings.
4. Wipe up any excess grease.
