McCulloch B40 B Elite Operator's Manual page 23

CAUTION:
must be replaced if it is damaged. Do not
use a product if the spark arrestor screen on
the muffler is missing or defective.
CAUTION:
is frequently blocked it can be a sign that
performance of the catalytic converter is
decreased. Turn to your servicing dealer to
examine the muffler. A blocked spark
arrestor screen will cause overheating and
result in damage to the cylinder and piston.
To clean/do maintenance on the
cooling system
This product has a cooling system. A dirty or blocked
cooling system can make the product too hot which can
damage the piston and cylinder. Check and clean the
cooling system with a brush one time each week or
more frequently in demanding conditions. The cooling
system have cooling fins on the cylinder (A) and air
intake (B).
Air filter
A dirty air filter can cause carburetor malfunction, start
problems, loss of engine power and wear to engine
parts. It also makes the engine use more fuel than
necessary. Clean the filter at an interval of 8 hours, or
more frequently if the product is operated in a dusty
environment.
Note:
An engine adjustment can be necessary when
the air filter has been cleaned or replaced. See
adjust the idle speed on page 22 .
1681 - 001 - 28.06.2021
The spark arrestor screen
If the spark arrestor screen
A
B
To
To clean and examine the air filter
1. Remove the air filter.
2. Clean the felt air filter with compressed air.
CAUTION:
if it cannot be fully cleaned. Always
replace a damaged felt air filter.
3. Clean the inner surface of the air filter cover. Use
compressed air or a brush.
Fuel filter
When the engine runs short of fuel, make sure that the
air hole in the fuel tank cap and the fuel filter (A) are
clean.
Bevel gear
The bevel gear is filled with the correct quantity of
grease at the factory. But, before you use the product,
make sure that the bevel gear is 3/4 full with grease.
Use McCulloch special grease.
It is not necessary to replace the grease in the bevel
gear unless the bevel gear is repaired.
Replace the felt air filter
A
23