10
1.
POWER HEAD - Includes the Engine, Clutch, Fuel System, Ignition System, and Recoil Starter.
2.
GRIP - Rear (right hand) handle.
3.
THROTTLE TRIGGER LOCKOUT - This lever must be held during aceleration. Operation of the throttle trigger is
prevented unless throttle trigger lockout lever is engaged.
4.
STOP SWITCH - "SLIDE SWITCH" mounted on top of the Throttle Trigger Housing. Move switch FORWARD to
RUN, BACK to STOP.
5.
FRONT HANDLE - Provides a secure forward grip for holding unit. Must be positioned for proper cutting attitude
and operator comfort.
6.
DRIVE SHAFT ASSEMBLY - Includes the Rear (right hand) Handle assembly (Model 310, 310S), Gear Housing
assembly, Blade attachment parts, Flexible Drive Cable (SRM-310S has a solid steel drive shaft) and Safety Decal.
7.
NYLON CUTTING ATTACHMENT - Contains replaceable nylon trimming line that advances when the trimmer head
is tapped against the ground while the head is turning at normal operating speed.
8.
CUT-OFF KNIFE - Automatically trims line to the correct length (5 in.) after head is tapped on the ground while nylon
cutting attachment is turning. If trimmer is operated without a cut-off knife, the line will become too long, the engine
will overheat and engine damage may occur.
9.
PLASTIC DEBRIS SHIELD ASSEMBLY - Deflects debris. MUST be installed on unit before Nylon Line Head use
(See Assembly Instructions). Shield assembly includes the Cut-Off Knife and Safety Decal. Mounts on the Gear
Housing Assembly just above the cutting attachment. Helps protect the operator by deflecting debris produced
during the trimming operation. This shield must be replaced with the steel shield for blade use.
10. THROTTLE TRIGGER - Controls engine speed. Spring loaded to return to idle when released. During acceleration,
press trigger gradually for best operating technique.
11. U-HANDLE - Provides secure two-handed control of trimmer/brushcutter. Required for metal blade operation.
12. BLADES - Circular steel blades for grass, weeds, or brush cutting applications. (Harness, metal shield, and U-handle
required for blade operation.)
13. METAL BLADE SHIELD - Required when unit is equipped with blades. Do not operate unit without shield.
14. SHOULDER HARNESS - An adjustable shoulder strap that suspends the unit from the operator's shoulder. Using
the strap reduces operator fatigue and enhances safety.
15. HIP PAD - Used to protect hip/leg and clothing when using U-handle equipped unit.
16. CHOKE - Adjusts Fuel/Air ratio for starting or running engine. The choke control is located at the top of the air filter
case. Move choke lever to "Cold Start" (
) to close choke for cold starting. Move choke lever to "Run" (
)
position to open choke.
17. SPARK PLUG - Provides spark to ignite fuel mixture.
18. TOP GUARD - Protects operator's arm from the hot engine during normal operation.
19. SPARK ARRESTOR - CATALYTIC MUFFLER / MUFFLER -The muffler or catalytic muffler controls exhaust noise
and emission. The spark arrestor screen prevents hot, glowing particles of carbon from leaving the muffler. Keep
exhaust area clear of flammable debris.
20. FUEL TANK - Holds fuel and contains the fuel filter.
21. RECOIL STARTER HANDLE - Starts engine. Pull handle slowly until starter engages, then quickly and firmly.
When engine starts, return handle slowly. DO NOT let handle snap back or damage to unit will occur.
22. FUEL TANK CAP - Covers and seals fuel tank opening.
23. PRIMER BULB - Primes carburetor for quick starting. Pumping primer bulb before starting engine draws fresh fuel
from the fuel tank, priming the carburetor for starting. Pump primer bulb until fuel is visible and flows freely in the
clear fuel tank return line. Pump bulb an additional 4 or 5 times.
24. AIR CLEANER - Filters out dirt and debris in air. Contains replaceable filter element.
25. SAFETY VIDEO - (Not included with unit) P/N 99922202540 English version only is available at a cost of $5.00 from
ECHO, INC. or any authorized ECHO dealer. The video overviews safety precautions and proper operating tech-
niques and is supplemental to the Safety Manual. You must read and understand the Safety Manual and Operators
Manual for complete information on safe operation.
MODEL SRM-310 PART DESCRIPTIONS
