7. When oil has drained completely, close the
drain valve.
8. Remove the drain hose (Figure 26).
Note:
Dispose of the used oil at a recycling
center.
9. Change the oil filter, if necessary (Figure 27).
10. Clean around the oil dipstick and unscrew the
cap (Figure 24).
11. Slowly pour approximately 80% of the
specified oil into the filler tube (Figure 24).
12. Check the oil level; refer to Checking the Oil
Level in Engine Maintenance, page 23.
13. Slowly add additional oil to bring it to the full
mark.
Changing the Oil Filter (For Model
74420 only)
Replace the oil filter every 100 hours or every
other oil change.
Note:
Change the oil filter more often in dusty,
dirty conditions.
1. Drain the oil from the engine; refer to Changing
and Draining the Oil in Engine Maintenance,
page 23.
2. Remove the old filter and wipe the filter
adapter gasket surface (Figure 27).
3. Apply a thin coat of clean oil to the rubber
gasket on the replacement filter (Figure 27).
Figure 27
1. Oil lter
3. Adapter
2. Gasket
4. 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 to 3/4 turn
(Figure 27).
5. Fill the crankcase with the proper type of new
oil; refer to Changing and Draining the Oil in
Engine Maintenance, page 23.
Servicing the Spark Plug
Replace the spark plug after every 100 operating
hours. Make sure that the air gap between the
center and side electrodes is correct before
installing the spark plug. Use a spark plug wrench
for removing and installing the spark plug(s) and a
gapping tool/feeler gauge to check and adjust the
air gap. Install a new spark plug if necessary.
Type: Champion RC12YC (or equivalent)
Air Gap: 0.030 inch (0.76 mm)
Removing the Spark Plug
1. Disengage the blade control switch, move the
motion controls outward to the park position,
stop the engine, and remove the key.
2. Pull the wire off of the spark plug (Figure 28).
Clean around the spark plug to prevent dirt
from falling into the engine and potentially
causing damage.
3. Remove the spark plug and metal washer.
Figure 28
1. Spark plug
2. Spark plug wire
Checking the Spark Plug
1. Look at the center of the spark plug (Figure 29).
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.
26
Summary of Contents for TimeCutter Z380
Page 8: ...Slope Chart 8 ...
