Echo SRM-225U Serial S79012004906 - S79012999999 - Manual (Page 11)

SRM-225U DESCRIPTION
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© 3/2014 ECHO Inc.
1. POWER HEAD - Includes the Engine, Clutch, Fuel System, Ignition System and Recoil Starter.
2. THROTTLE TRIGGER LOCKOUT - This lever must be held during starting. Operation of the throttle
trigger is prevented unless throttle trigger lockout lever is engaged.
3. STOP SWITCH - “SLIDE SWITCH” mounted on top of the Throttle Trigger Housing. Move switch
FORWARD to RUN, BACK to STOP.
4. THROTTLE TRIGGER - Controls engine speed. Spring loaded to return to idle when released. During
acceleration, press trigger gradually for best operating technique.
5. DRIVE SHAFT ASSEMBLY - Includes U-Handle, Gear Housing Assembly, Drive Shaft and Safety
Decal.
6. NYLON CUTTER HEAD - 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.
7. CUT-OFF KNIFE - Automatically trims line to the correct length: 5" after head is tapped on the ground. If
trimmer is operated without a cut-off knife, the line will become too long, the engine will overheat, and
engine damage may occur.
8. PLASTIC DEBRIS SHIELD ASSEMBLY - Included in plastic bag (co-pack). MUST be installed on unit
before use, see Assembly Instructions. Shield assembly includes the Cut-Off Knife. 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 metal shield for blade
use.
9. U-HANDLE - Required for metal blade operation.
10. HIP PAD - Used to protect hip/leg and clothing when using U-handle equipped unit.
11. SHOULDER HARNESS - An adjustable strap that suspends the unit from the operator. Using the strap
reduces operator fatigue.
12. BLADE - Circular blade for grass, weed or brush cutting applications. Harness, metal shield & U-handles
required for blade operation.
13. METAL BLADE SHIELD - Required when unit is equipped with blades. Do not operate unit without
shield.
14. SPARK PLUG - Provides spark to ignite fuel mixture.
15. ARM REST - Provides arm rest during operation and protects arm from the hot engine.
16. RECOIL STARTER HANDLE - 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.
17. SPARK ARRESTOR MUFFLER OR SPARK ARRESTOR MUFFLER WITH CATALYST - 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.
18. FUEL TANK - Contains fuel and fuel filter.
19. FUEL TANK CAP - Covers and seals fuel tank opening.
20. CHOKE - The choke control is located at the rear of the air cleaner housing. Move choke lever to Cold
Start ( ) to close choke for cold start. Move choke lever to “Run” ( ) position to open choke.
21. AIR CLEANER - Contains replaceable filter element.
22. PURGE BULB - Pumping purge bulb before starting engine draws fresh fuel from the fuel tank, purging
air from the carburetor. Pump purge bulb until fuel is visible and flows freely in the clear fuel tank return
line. Pump purge bulb an additional 4 or 5 times.