McCulloch MAC GB 275 - Manual (Page 7)

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A dirty air filter decreases engine perform-
ance and increases fuel consumption and
harmful emissions. Always clean after every
5 hours of operation or yearly, whichever
comes first.
1. Clean the cover and the area around it to
keep debris from falling into the carburetor
chamber when the cover is removed.
2. Press button to open air filter cover. Re-
move air filter.
NOTE: Do not clean filter in gasoline or other
flammable solvent. Doing so can create a fire
hazard or produce harmful evaporative emis-
sions.
3. Wash the filter in soap and water.
4. Allow filter to dry.
5. Apply a few drops of oil to the filter;
squeeze filter to distribute oil.
6. Replace parts.
REPLACE SPARK PLUG
Replace spark plug each year to ensure the
engine starts easier and runs better. Set
spark plug gap at 0.6 mm. Ignition timing is
fixed, nonadjustable.
1. Twist, then pull off spark plug boot.
2. Remove spark plug from cylinder and dis-
card.
3. Replace with Champion RCJ-6Y spark
plug and tighten securely with a 19 mm
socket wrench.
4. Reinstall the spark plug boot.
CARBURETOR ADJUSTMENTS
There is no screw for idle adjustment on your
blower. The throttle lever is used to control en-
gine speed. The engine speed can be ad-
justed by moving the throttle lever to the left
for low speed or right for high speed. If your
engine will not run properly or you require fur-
ther assistance, contact an authorized ser-
vice dealer.
STORAGE
WARNING: Prepare unit for storage at
end of season or if it will not be used for 30 days
or more.
S
Allow engine to cool, and secure the unit be-
fore storing or transporting.
S Store unit and fuel in a well ventilated area
where fuel vapors cannot reach sparks or
open flames from water heaters, electric mo-
tors or switches, furnaces, etc.
S Store unit with all guards in place. Position unit
so that any sharp object cannot accidentally
cause injury.
S Store unit and fuel well out of the reach of chil-
dren.
EXTERNAL SURFACES
S If your unit is to be stored for a period of time,
clean it thoroughly before storage. Store in a
clean dry area.
S Lightly oil external metal surfaces.
INTERNAL ENGINE
S Remove spark plug and pour 1 teaspoon of
2-cycle engine oil (air cooled) through the
spark plug opening. Slowly pull the starter
rope 8 to 10 times to distribute oil.
S Replace spark plug with new one of recom-
mended type and heat range.
S Clean air filter.
S Check entire unit for loose screws, nuts, and
bolts. Replace any damaged, broken, or worn
parts.
S Start each season using only fresh fuel hav-
ing the proper gasoline to oil ratio.
OTHER
S Do not store gasoline from one season to
another.
S Replace your gasoline can if it starts to rust.