17
NYLON CUTTING HEAD
The nylon cutting head is a dual string trimmer head capable of both automatic
and bump & feed mechanisms.
The nylon cutting head will automatically feed out the proper length of nylon
cord by the changes in centrifugal force caused by increasing or decreasing
rpms. However, to cut soft grass more efficiently, bump the nylon cutting head
against the ground to feed out extra cord as indicated under operation section.
Operation
Increase the nylon cutting head speed to approx. 6,000 min
–
-1
.
Low speed (under 4,800 min
-1
) is not suitable, the nylon cord will not feed out
properly at low speed.
The most effective cutting area is shown by the shaded area.
–
If the nylon cord does not feed out automatically proceed as follows:
1. Release the throttle lever to run the engine idle and then squeeze the throttle
lever fully. Repeat this procedure until the nylon cord feeds out to the proper
length.
2. If the nylon cord is too short to feed out automatically with the above
procedure, bump the knob of the nylon cutting head against the ground to
feed out the nylon cord.
3. If the nylon cord does not feed out with procedure 2, rewind/replace the
nylon cord by following the procedures described under “Replacing the nylon
cord”.
Replacing the nylon cord
First, stop the engine.
–
Press on the housing latches inward to lift off the cover, then remove the
–
spool.
Hook the new nylon cord into the each hole at the spool, with one end of the
–
cord extending about 80 mm (3-1/8”) more than the other.
Then wind both ends firmly around the spool in the direction of the head
rotation (left-hand direction indicated by LH and right-hand direction by RH on
the side of the spool).
Wind all but about 150 mm (6”) of the cords, leaving the ends temporarily
–
hooked through a notch on the side of the spool.
Feed the cords through the eyelets to come out of the housing.
–
Mount the spool in the housing with the spring and washer.
Idle speed
Most effective cutting area
Knob
Spool
Spool
80 mm (3-1/8”)
For left hand rotation
Full speed
Cover
Latches
Press
Press
Notches
150 mm (6”)
Eyelets
