Service and adjustments – McCulloch MAC 250 B User Manual
Page 13
13
CLEAN AIR FILTER
A dirty air filter decreases engine perform-
ance and increases fuel consumption and
harmful emissions. Always clean after every
5 hours of operation.
1. Clean the cover and the area around it to
keep dirt from falling into the carburetor
chamber when the cover is removed.
2. Remove parts as illustrated.
NOTE:
Do not clean filter in petrol or other
flammable solvent to avoid creating a fire haz-
ard or producing harmful evaporative emis-
sions.
3. Wash the filter in soap and water.
4. Allow filter to dry.
5. Replace parts.
Button
Air Filter Cover
Air Filter
REPLACE SPARK PLUG
Replace the 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 and 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.
SERVICE AND ADJUSTMENTS
REPLACING THE LINE
1. Press the tabs on the side of the trimmer
head and remove cover and spool.
Tab
Tab
Cover
Spool
2. Remove any remaining line.
3. Clean dirt and debris from all parts. Re-
place spool if it is worn or damaged.
4. Replace with a pre-wound spool, or re-
place line using a 4,5 meters length of 2,4
mm diameter McCulloch brand line.