Operation, Maintenance – Ryobi RY34005 User Manual
Page 11
9 — English
OPERATION
BLADE THRUST
Exercise extreme caution when using a blade attachment 
with this unit. Blade thrust is the reaction that may occur 
when the spinning blade contacts anything it cannot cut. 
This contact may cause the blade to stop for an instant, and 
suddenly “thrust” the unit away from the object that was hit. 
This reaction can be violent enough to cause the operator 
to lose control of the unit. Blade thrust can occur without 
warning if the blade snags, stalls, or binds. This is more likely 
to occur in areas where it is difficult to see the material being 
cut. For cutting ease and safety, approach the weeds being 
cut with the brush cutter from the right to the left. In the event 
an unexpected object or woody stock is encountered, this 
practice could minimize the blade thrust reaction. 
STARTING AND STOPPING
See Figures 6 - 8.
Trimmer should be on a flat, bare surface for starting. 
To start a cold engine:
	
Slowly press the primer bulb 10 times.
NOTE: After the 7th press, fuel should be visible in the 
primer bulb. If it is not, continue to press the primer until 
you see fuel in the bulb.
Set the choke lever to the
FULL CHOKE position.
With the throttle trigger at idle, pull starter handle sharply 
until engine attempts to run. Do not pull the starter handle 
more than four (4) times.
Set the choke lever to the
HALF CHOKE position.
Pull the starter grip until the engine runs. Do not pull the 
starter grip more than six (6) times.
NOTE: If the engine does not start, return to the FULL 
CHOKE position and repeat the steps that follow.
Allow the engine to run for 10 seconds, then set the choke 
lever to the 
RUN position.
To restart a warm engine:
	
Slowly press the primer bulb 10 times.
Set the choke lever to the
RUN position.
Pull the starter grip until the engine runs. Do not squeeze 
the throttle trigger to start a warm engine.
To stop the engine:
To stop the engine, depress the
STOP switch to the stop
position “ ”.
IF ASSISTANCE IS REQUIRED FOR THIS PRODUCT:
Do not return this product to the retail store where it was 
purchased. Please call our Customer Service Department 
for any issues you may have. 
For Help Call: 1-800-860-4050
MAINTENANCE
WARNING:
When servicing, use only identical replacement parts. 
Use of any other parts can create a hazard or cause 
product damage.
WARNING:
Always wear eye protection with side shields marked to 
comply with ANSI Z87.1, along with hearing protection. 
Head protection may also be required depending on the 
type of attachment used and as prescribed in the attach-
ment’s Operator’s Manual. Failure to do so could result in 
objects being thrown into your eyes and other possible 
serious injuries.
WARNING:
Before inspecting, cleaning, or servicing the machine, 
shut off engine, wait for all moving parts to stop, and 
disconnect spark plug wire and move it away from spark 
plug. Failure to follow these instructions can result in 
serious personal injury or property damage.
GENERAL MAINTENANCE
Avoid using solvents when cleaning plastic parts. Most 
plastics are susceptible to damage from various types of 
commercial solvents and may be damaged by their use. Use 
clean cloths to remove dirt, dust, lubricant, grease, etc.