Toro 53008 - Idle Speed Adjustment; Cylinder Cooling Fins

20
POTENTIAL HAZARD
• Engine must be running to make some
carburetor adjustments.
• When engine is running, trimmer head is
rotating and other parts are moving.
WHAT CAN HAPPEN
• Contact with rotating trimmer head or other
moving parts could cause serious personal
injury or death.
HOW TO AVOID THE HAZARD
• Keep hands, feet and clothing away from
trimmer head and other moving parts.
• Keep all bystanders and pets away from unit
while making carburetor adjustments.
The trimmer head may be rotating during idle speed
adjustment. Wear the recommended personal protective
equipment and observe all safety instructions. Keep hands
and body away from the trimmer head.
When the throttle trigger is released, the engine should
return to an idle speed between 2400 and 2800 RPM, or
just below the clutch engagement speed. The trimmer
head must not rotate and the engine should not stall (stop
running) at engine idle speed (Fig. 13).
To adjust the engine idle speed, rotate the idle speed
adjustment screw on the carburetor (Fig. 25).
• Turn the idle speed screw in (clockwise) to increase
the engine idle speed.
• Turn the screw out (counterclockwise) to decrease the
engine idle speed.
If idle speed adjustment is necessary, and after
adjustment the trimmer head rotates or the engine
stalls, stop using the String Trimmer immediately!
Contact your local authorized Toro Dealer for assistance
and servicing.
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m-2974
Figure 25
1. Idle Speed Adjustment Screw
Cylinder Cooling Fins
Maintenance Interval
The cylinder cooling fins should be cleaned after every 25
hours of operation, or once a week, whichever comes first.
Air must flow freely around and through the cylinder
cooling fins to prevent engine overheating. Leaves, grass,
dirt and debris buildup on the fins will increase the
operating temperature of the engine, which can reduce
engine performance and shorten engine life.
Cooling Fin Cleaning
1. With the engine cool (ambient or room temperature),
remove the socket head screw holding the muffler
cover, then remove the muffler cover (Fig. 26).
2. Loosen the cylinder cover screw and remove the
cylinder cover (Fig. 22).
3. Clean all dirt and debris from the cooling fins and
from around the cylinder base.
4. Reinstall the cylinder cover and the muffler cover
(Figs 22 and 26).
m-2927
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Figure 26
1. Muffler Cover 2. Screw