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GB - 21
FILLING FUEL TANK
Fuel Shut-Off Valve
IMPORTANT: The fuel shut-off valve MUST
be in the closed position prior to transporting
the unit.
The fuel shut-off valve has two positions:
To add fuel to fuel tank:
1. ALWAYS place unit in open or well-
ventilated area.
2. Stop engine and allow to cool.
3. Clean fuel cap and surrounding area to
prevent dirt from entering fuel tank.
4. Remove cap.
5. Fill fuel tank to within 1/2 in. (1.2 cm)
below bottom of filler neck with unleaded
gasoline.
NOTE: Refer to Engine Manual for proper
fuel type and tank capacity.
6. Replace fuel cap and tighten.
7. ALWAYS clean up any spilled fuel.
GASOLINE
IMPORTANT: ALWAYS use gasoline that
meets the following guidelines:
• Clean, fresh gasoline.
• A minimum of 87 octane/87 AKI (91
RON). High altitude use may require a
different octane. Consult your engine
manual.
• Gasoline with up to 10% ethanol
(gasohol) or up to 15% MTBE (methyl
tertiary butyl ether) is acceptable.
• Use of any gasoline other than those
approved above may void the engine
warranty. If the pumps are not marked
for the content of alcohol or ethers,
check ethanol and MTBE levels with
the fuel supplier.
• Do not modify the fuel system to use
different fuels.
• Never mix oil and gasoline.
NOTE: All gasoline is not the same. If the
engine experiences starting or performance
problems after using a new gasoline, switch
to a different fuel provider or fuel brand.
IMPORTANT: Excessively oxygenated or
reformulated fuels (fuels blended with
alcohols or ethers) can damage the fuel
system or cause performance problems. If
any undesirable operating problems occur,
use a gasoline with a lower percentage of
alcohol or ether.
Fuel Stabilizer
Gasoline left in the fuel system for extended
periods without a stabilizer will deteriorate,
resulting in gum deposits in the system.
These deposits can damage the carburetor
and the fuel hoses, filter and tank. Prevent
deposits from forming in the fuel system
during storage by adding a quality fuel
stabilizer to the fuel. Follow the
recommended mix ratio found on the fuel
stabilizer container.
PRE-START
1. Frozen Impeller
IMPORTANT: Before starting engine, check
impeller to be sure it is not frozen.
To check impeller:
1. With ignition key switch in “Stop”
position, squeeze Attachment Clutch
Lever to Engaged position.
WARNING: AVOID INJURY. Read
and understand the entire Safety
section before proceeding.
Figure 22
Open Position: Use this
position to run the unit.
Closed Position: Use this
position to service, transport, or
store the unit.
OS77280
Figure 23
Open Position: Use this
position to run the unit.
Closed Position: Use this
position to service, transport, or
store the unit.
921019, 020