MAINTENANCE
CAUTION:
Dull or improperly sharpened chain can cause excessive engine speed during cutting which may result in severe engine damage.
WARNING:
Improper chain sharpening increases the potential of kickback. Failure to replace or repair damaged chain can cause serious injury.
SPOOL REPLACEMENT
NEW PREWOUND SPOOL
See Figures 32 - 33.
If replacing string only, refer to “String Replacement” later in this manual.
Use only monofilament string. Use original manufacturer’s replacement string for best performance.
nStop the engine and disconnect the spark plug wire. Hold the string head and unscrew the spool retainer.
To remove the spool retainer:
nTurn the spool retainer counterclockwise.
nRemove the empty spool from the string head. Keep the spring attached to the spool.
nTo install the new spool, make sure the two strings are captured in the slots opposite each other on the new spool. Make sure the ends of each string are extended approximately 6 in. beyond each slot.
nThread the strings into the eyelets in the string head. Carefully push the spool into the string head (gently pull the strings to the outside if necessary). When the spool is positioned in the string head, grasp the strings and pull sharply to release them from the slots in the spool.
nPush down and turn the spool counterclockwise until it no longer turns. Hold the spool down and rotate clockwise a small amount. Release the spool. The spool should be locked down in the string head. If not, hold down and rotate until locked.
nMake sure the string head and the spool retainer are installed on the drive shaft.
SPOOL
RETAINER
Fig. 32
SPRING
SLOTS
EYELETS
STRING HEAD
SHAFT
Fig. 33
To install the spool retainer:
nTurn the spool retainer clockwise.
nPull the strings again to rotate the spool into cutting position. Push the spool retainer down while pulling on string(s) to manually advance the string and to check for proper assembly of the string head.
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