Chapter 2: maintenance – Cub Cadet CC 4BP 32cc User Manual
Page 6
Maintenance
3
MAINTENANCE
The specifics in this manual are aimed at the 32cc back
pack blower, however the contents can be used for
most outdoor power equipment.
As the saying goes “an ounce of prevention is worth a
pound of cure” the same can be said about preventive
maintenance on outdoor power equipment. By chang-
ing the spark plug, air filter, and oil in annual intervals
many failures can be avoided. Sometimes just clearing
off yard debris that was collected while in use can
make the difference between a properly running piece
of equipment or a failure.
Spark plugs
1.
The spark plug used in the 32cc back pack
blower is a Champion RDZ19H gapped to .025”
(.6 mm). See Figure 2.1.
Figure 2.1
2.
Wear rate will vary somewhat with severity of
use. If the edges of the center electrode are
rounded-off, or any other apparent wear / dam-
age occurs, replace the spark plug before oper-
ating failure (no start) occurs.
3.
Cleaning the spark plug:
NOTE: It is not recommended to clean spark
plugs. Use of a wire brush may leave metal
deposits on the insulator that causes the spark
plug to short out and fail to spark. Use of abra-
sive blast for cleaning may cause damage to
ceramic insulator or leave blast media in the
recesses of the spark plug. When the media
comes loose during engine operation, severe
and non-warrantable engine damage may result.
4.
Inspection of the spark plug can provide indica-
tions of the operating condition of the engine.
•
Light tan colored deposits on insulator and elec-
trodes is normal.
•
Dry, black deposits on the insulator and elec-
trodes indicate an over-rich fuel / air mixture (too
much fuel or not enough air)
•
Wet, black deposits on the insulator and elec-
trodes indicate the presence of oil in the com-
bustion chamber.
•
Heat damaged (melted electrodes / cracked
insulator / metal transfer deposits) may indicate
detonation.
•
A spark plug that is wet with fuel indicates that
fuel is present in the combustion chamber, but it
is not being ignited.
CHAPTER 2: MAINTENANCE