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Operation
WARNING:
Do not allow familiarity with tools to make you
careless. Remember that a careless fraction of a
second is suffi cient to infl ict serious injury.
WARNING:
Always wear safety goggles or safety glasses
with side shields when operating power tools.
Failure to do so could result in objects being
thrown into your eyes resulting in possible seri-
ous injury.
WARNING:
Do not use any attachments or accessories not
recommended by the manufacturer of this tool.
The use of attachments or accessories not rec-
ommended can result in serious personal injury.
Applications
Use this product for the following applications:
■
Cutting grass, weeds, and light undergrowth
(all models)
■
Edging along sidewalks and driveways (all models)
■
Cutting pulpy weeds, vines, and light brush
(Model No. 51990)
Mixing the Fuel
DANGER:
Gasoline is extremely fl ammable and explosive.
A fi re or explosion from gasoline will burn you
and others.
This product is powered by a 2-cycle engine and requires pre-
mixing gasoline and 2-cycle oil. The oil mix should be 50:1,
using oil that meets or exceeds JASO-FC specifi cations.
Follow these steps to mix the fuel.
1. Obtain a clean container that is approved for use with
gasoline.
2. Mix the 2-cycle engine oil provided with unleaded
gasoline in the container, according to the instructions
on the oil carton.
Important: This engine is certifi ed to operate on unleaded
gasoline intended for automotive use with an octane rating
of 87 ([R + M] / 2) or higher. Do not use automotive oil or
2-cycle outboard oil. Store the container out of the reach of
children.
Operation
50:1 Gasoline to Oil Mixing Chart
Gasoline
Oil
1/2 US gallon
1.3 oz.
1 US gallon
2.6 oz.
2 US gallons
5.2 oz.
1 liter
20 ml
2 liters
40 ml
3 liters
60 ml
4 liters
80 ml
5 liters
100 ml
+
=
Filling the Tank
WARNING:
Always stop the engine before fi lling the tank.
Never add fuel to a machine with a running or
hot engine. Move at least 30 ft. (9 m) away from
the refueling site before starting the engine. Do
not smoke while fi lling the tank.
Follow these steps to fi ll the tank.
1. Clean the surface around the fuel cap to prevent con-
tamination.
2. Loosen the fuel cap by turning it counterclockwise.
3. Pour the fuel mixture carefully into the tank.
4. Clean and inspect the gasket.
Note: Replace the fuel cap if the gasket is damaged.
5. Install the fuel cap and tighten it by turning it clock-
wise.
WARNING:
Check for fuel leaks. If you fi nd any leaks, correct
the problem before using the product.
6. Wipe spilled fuel from the product.
7. Move at least 30 ft. (9 m) away before starting the
product.
Note: It is normal for the engine to emit smoke during
use.
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