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Chain oil fi lter (Fig. 39)
Remove the oil fi lter and thoroughly wash it in solvent.
Fig. 39
Cleaning the cylinder fi ns (Fig. 40)
When wood chips are caught between cylinder fi ns (40), the engine
may overheat, resulting in lower output. To avoid this, always keep
cylinder fi ns and fan case clean.
Every 100 operating hours, or once a year (more often if conditions
require), clean fi ns and external surfaces of engine of dust, dirt and
oil deposits which can contribute to improper cooling.
40
Fig. 40
Cleaning the muffl er (Fig. 41)
Remove the muffl er and spark arrestor, if so equipped, and clean out
any excess carbon from the exhaust port or muffl er inlet every 100
hours of operation.
Fig. 41
For long-term storage
Drain all fuel from the fuel tank. Start and let engine run until it stops.
Repair any damage which has resulted from use. Clean the unit with
a clean rag, or the use of high pressure air hose. Put a few drops of
two-cycle engine oil into the cylinder through the spark plug hole,
and spin the engine over several times to distribute oil.
Cover the unit and store it in a dry area.
CHAIN SHARPENING
Parts of a cutter (Fig. 42, 43)
WARNING
○ Gloves should be used when sharpening chain.
○ Be sure to round off the front edge to reduce the chance of
kickback or tie-strap breakage.
42
41
43
44
45
46
47
48
49
Fig. 42
53
52
51
50
Fig. 43
41. Top plate
42. Working corner
43. Side plate
44. Gullet
45. Heel
46. Chassis
47. Rivet hole
48. Toe
49. Depth gauge
50. Correct angle on top plate (degree of angle depends on chain
type)
51. Slightly protruding “hook” or point (curve on non-chisel chain)
52. Top of depth gauge at correct height below top plate
53. Front of depth gauge rounded off
LOWERING DEPTH GAUGES WITH A FILE
1) If you sharpen your cutters with a fi le holder, check and lower the
depth.
2) Check depth gauges every third sharpening.
3) Place depth gauge tool on cutter. If depth gauge projects, fi le
it level with the top of the tool. Always fi le from the inside of the
chain toward an outside cutter. (Fig. 44)
Fig. 44