Honda HHT25S Owner's Manual page 5

Cutting-line Head and Shield Installation
Prior to installation, move the ignition switch to the STOP (O) position
and disconnect the spark plug cap from the spark plug.
1. Install the cutting-line head debris shield as shown below.
2. Tighten the 5 x 28 mm bolt/washers:
TORQUE: 2.5 ft-lb (3.4 N·m)
3. Insert the tip of a 4 mm hex wrench, or equivalent, fully into the
gear case hole.
4. Turn the output shaft until you feel the tool drop into the hole in the
cover plate/spacer A. Verify the trimmer head does not turn.
5. All output shafts use left-hand threads. Make sure the tool remains
in the hole, then grasp the trimmer head and turn in the direction of
the arrow to install.
CUTTING-LINE HEAD
SPACER B
COVER PLATE/
SPACER A
4 mm hex
wrench
5 x 28 mm
BOLT/WASHER (4)
SPACER (2)
[3/32" (2.3 mm) thick]
CUTTING-LINE
DEBRIS SHIELD
(with cutoff knife)
OUTPUT SHAFT
(left-hand thread)
GEAR CASE HOLE
Brush/Wood (50-tooth) Blade and Shield Installation
Prior to installation, move the ignition switch to the STOP (O) position
and disconnect the spark plug cap from the spark plug. Wear
protective gloves when working around the cutting-line head and saw
blade.
1. Install the brush/wood blade debris shield as shown below.
2. Tighten the 5 x 28 mm bolt/washers:
TORQUE: 2.5 ft-lb (3.4 N·m)
BOLT/WASHER (4)
SPACER (2)
[3/32" (2.3 mm) thick]
BRUSH/WOOD BLADE
DEBRIS SHIELD
3. Insert a 4 mm hex wrench or equivalent into the gear case hole to
prevent the output shaft from turning.
4. Install cover plate/spacer A onto the output shaft as shown.
COVER
SPACER B
BLADE
Install with the white
markings facing the
debris shield.
BLADE
COVER
COVER PLATE/
SPACER A
5. With the blade cover installed on the blade, install the blade by
aligning the center of the blade with the shoulder on cover plate/
spacer A.
6. Install spacer B, the cover, and the 10 mm lock nut as shown.
Be sure to install the blade with the cutting edges of the saw teeth
in the direction of rotation; the side with the white markings must
face the debris shield.
The output shaft has left-hand threads. Tighten the 10 mm lock nut
counterclockwise.
TORQUE: 14 ft-lb (20 N•m)
7. Remove the 4 mm hex wrench or equivalent from the gear case.
5 x 28 mm
TIGHTEN
10 mm LOCK NUT
(left-hand thread)
OUTPUT SHAFT
(left-hand thread)
4 mm HEX TOOL
5