Craftsman 917.773420 - Manual (Page 13)

TO REMOVE/REPLACE TRIMMER HEAD
DRIVE BELT
1. Remove screw at front of chassis
cover.
2. Lift cover up and away from trimmer.
3. Turn trimmer on its side with carbure­
tor and fuei cap up.
4. Remove beit from engine pulley on
crankshaft.
5. Remove belt from trimmer head pulley,
6. Remove idler assembly from chassis
and remove belt and idler from
trimmer.
7. Remove belt from idler assembly by
removing bottom belt keeper and idler
pulleys.
8. Assemble new belt, idler pulleys and
bottom belt keeper to idler bracket.
Tighten pulley bolts securely.
NOTE: Be sure belt is inside top belt
keeper on idler assembly.
9. Position belt and idler assembly in
trimmer and assemble idler to chassis.
Tighten securely.
10. Install belt around trimmer head pulley
and engine pulley.
11. Replace chassis cover and tighten
screw securely.
Always use Craftsman replacement parts
to assure proper fit and long life.
ENGINE
ENGINE SPEED
Your engine speed has been factory set.
Do not attempt to increase engine speed
or it may result in personal injury. If you
believe that the engine is running too fast
or too slow, take your unit to a Sears or
other qualified service center for repair
and/or adjustment.
CARBURETOR
Your carburetor has a nonadjustable fixed
main jet for mixture control. If your engine
does not operate properly due to sus­
pected carburetor problems, take your
unit to a Sears or other qualified service
center for repair and/or adjustment.
IMPORTANT; Never tamper with the
engine governor, which is factory set for
proper engine speed. Overspeeding the
engine above the factory high speed
setting can be dangerous, if you think the
engine-governed high speed needs
adjusting, take your unit to a Sears or
other qualified service center, which has
proper equipment and experience to
make any necessary adjustments.
Flat idler
Bottom belt
keeper
Flat idler
Top belt
keeper
Trimmer
head pulley