GRASS TRIMMER/BRUSH CUTTER
OPERATOR'S MANUAL
15
A
U-HANDLE INSTALLATION
Model SRM-310U Only
Tools Required: Scrench, 4 mm Hex Wrench
Parts Required: U-Handle, Clamp w/screws, 8 mm x 55 mm hex bolt,
8 mm flat washer
1. Install upper U-Handle and bracket on lower bracket with one (1)
8 mm x 55 mm bolt (A) and (1) large circular washer. Do not tighten
bolt securely until final adjustments are completed.
2. Loosen upper (2) U-handle clamp screws (B), and position U-
handle as shown.
3. Lightly tighten 8mm bolt (A) and clamp screws (B) to hold U-handle
in position until final adjustments are completed.
A
B
C
A
B
CONNECT THROTTLE LINKAGE AND IGNITION LEADS
Tools Required: 8 x 10 mm Open-end Wrench
Parts Required: Cable Clips
1. Unscrew air filter cover knob and remove cover.
2. Place inner throttle cable in slot of carburetor swivel (B).
3. Loosen nut (A) and place threaded end of throttle linkage in
bracket slot. Finger tighten nut (A).
4. Check throttle for freedom of movement and that wide open
throttle / low idle extremes are adjusted properly. If adjustment
cannot be achieved with adjusting nuts, consult with your Echo
Dealer for correct adjustment procedure.
5. Tighten nut (A). Connect 2 ignition leads from throttle cable tubing
to 2 ignition leads (C) on engine. Gather ignition wires and
position behind air filter case.
6. Install air filter and cover.
Model 310U Only:
7. Secure throttle cable to drive shaft using cable clips provided.
BALANCE AND ADJUST UNIT
1. Loosen harness clamp screw.
2. Put on harness and attach unit to harness.
3. Slide harness clamp up (A) or down until unit balances with head
approximately 50-75 mm (2 -3 in.) from the ground.
4. Tighten harness clamp screw.
5. Loosen upper U-Handle clamp screws (G), and position U-Handle
for comfortable operation.
6. Tighten U-Handle clamp screws and 8 mm clamp bolt securely.
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