Changing the Engine-Oil Filter
Service Interval:
Every 200 hours—Change the oil filter
(more often in dusty, dirty conditions).
Note:
Change the engine-oil filter more frequently when
operating conditions are extremely dusty or sandy.
1.
Drain the oil from the engine; refer to
Engine Oil (page 36)
.
2.
Change the engine oil filter (
).
B
A
C
D
E
F
3/4
g027477
Figure 42
Note:
Ensure that 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 Engine Oil (page 36)
.
Servicing the Spark Plug
Service Interval:
Every 100 hours—Check the spark plug(s).
Make sure 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(s) if necessary.
Type:
NGK BPR4ES (or equivalent)
Air Gap:
0.76 mm (0.03 inch)
Removing the Spark Plug
1.
Disengage the blade-control switch (PTO).
2.
Stop the engine, wait for all moving parts to stop, and
remove the key before leaving the operating position.
3.
Remove the spark plug (
).
B
A
g027478
Figure 43
Checking the Spark Plug
Important:
Do not clean the spark plug. Always
replace the spark plug when it has a black coating, worn
electrodes, an oily film, or cracks.
Note:
If you see light brown or gray on the insulator, the
engine is operating properly. A black coating on the insulator
usually means that the air cleaner is dirty.
Set the gap to 0.76 mm (0.030).
B
A
g027479
Figure 44
37
Summary of Contents for timecutter zs 4200t
Page 55: ...Schematics Electrical Diagram Rev A 55 ...
Page 56: ...Notes 56 ...
Page 57: ...Notes 57 ...
Page 58: ...Notes 58 ...