— US-19 —
5. Reinstall the spark arrester and tail onto the muffler,
then reinstall and tighten the two socket head screws.
6. Reinstall the cylinder cover and the air filter
cover.
Exhaust Muffler
Maintenance Interval
The muffler should be inspected and cleaned after
each 100 hours of use.
Muffler Maintenance
1. With the engine at ambient (room) temperature,
loosen the knob and remove the air filter cover.
2. Twist the high tension lead boot on the spark plug
back and forth a couple of times to loosen the
boot, then pull the boot off of the spark plug.
3. Loosen the knob and lift off the cylinder cover.
4. Remove the spark arrester (see spark arrester
maintenance), Clean the muffler with a stiff brush.
IMPORTANT: Don’t use solvent for cleaning
inside of muffler, because of the catalytic
converter in muffler.
Be careful not to allow any dirt or debris to fall
into the exhaust port, as this can cause engine
damage.
5. Reinstall the spark arrester and tail onto muffler,
then reinstall and tighten the two socket head
screws.
6. Reinstall the cylinder cover and the air filter
cover.
Adjusting Cutting Blades
Maintenance Interval
Before operating the power Hedge Trimmer it is
necessary to check the adjustment of the cutting
blades. Blades that are too loose may vibrate, and will
not provide a clean, smooth cut.
Cutting Blades Maintenance
CAUTION : BLADES THAT ARE TOO TIGHT
CAN CAUSE OVERLOADING WHICH MAY
DAMAGE THE EQUIPMENT.
To adjust the cutting blades, refer to the illustrations
and locate the tension screws.
Loosen the tension screw locknuts. Gently turn the
tension screws in until sung, then turn the tension
screws back out 1/4-1/2 turn. While holding the screws
in place, tighten the locknuts. Liberally coat the cutting
blades with light oil. Start the engine and operate the
Hedge Trimmer at full speed for at least one minute.
Stop the engine, and when the blades are motionless,
check the blade temperature carefully. The blades may
be warm, but if they are too hot to touch, loosen the
tension screws 1/8 turn.
CAUTION
• DO NOT TOUCH THE SHARPENED
EDGES OF THE CUTTING BLADES. THE
CUTTING BLADES ARE EXTREMELY
SHARP AND DANGEROUS AT ALL
TIMES.
Upper Blade
Lower Blade
Locknut
Guide Bar
Locknut
Flat Washer
Tension Screw
Tension Screw
