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11
SERVICE AND ADJUSTMENTS
WARNING: Always stopunitanddis-
connect spark plug wire (or disconnect pow-
erheadfrompowersource)beforeperforming
maintenance, servi ce, or adjustments e xc ep t
for carburetor adj ustments.
CHAIN SHARPENING
Chain sharpening is a c omplicated task that
requires specialtools.We recommendedyou
refer chainsharpeningtoaprofessionalchain
sharpener.
CHAIN REPLACEMENT
WARNING: Wear protective gloves
when handling chain. The chain is sharp and
can cut you even when it is not moving.
It is normal for a new chain to stretch during the
first 15 minutes of operation. Y ou should re-
check your chain tension f requently and adjust
thechain tensionas required.See CHAIN TEN-
SION s ection.
Replace the old chain when it becomes worn or
damaged. Use only the Low-Kickback replace-
ment chain s pecified in t he repair parts list.
TO REPLACE CHAIN:
1. Move ON/OFF switch tothe OFF position
and disconnect spark plug (ordisconnect
powerhead from power source).
2. Remove bar clamp nut.
3. Remove bar clamp.
4. Turn adjusting screw by hand counter-
clockwise until adjusting pin just touches
the stop.
5. Slide guide bar behind sprocket until
guide bar stops against sprocket.
6. Remove the old chain.
7. Carefully remove new chain from pack-
age. Hold chain with the drive links as
shown.
CUTTERS MUST FACE IN
DIRECTION OF ROTATION
Tip o f
Bar
Cutter
Drivelink
Cutters
Depth Gauge
Drive Links
8. Placechainoversprocket,fitting thedrive
links in the sprocket.
9. Fit bottom of drive links between the teeth in
the sprocket in t he nose of t he guide bar.
10. Fit chain drive links into bar groove.
11. Pull guide bar forward until chain is snug
inguidebar groove. Ensureall drivelinks
are in the bar groove.
12. Now , install bar clamp making sure the
adjusting pin is positioned in the lower
hole in the guide bar.
Adjusting Pin
Lower Hole
Guide Bar
13. Install bar clamp nut and finger tighten
only. Do not tighten any further at this
point. Proceed to the CHAIN ADJUST-
MENT section.
CHAIN ADJUST MENT
See CHECK CHAIN TENSION in MAINTE-
NANCE section.