McCulloch B43BT Bedienungsanweisung Seite 20

• Examine all cables and connections.
• Examine the fuel filter.
To adjust the carburetor
The basic carburetor settings are adjusted during testing
at the factory. Adjustment must be carried out by a
trained technician.
To do a check of the muffler
WARNING: Do not use a product that has a
defective muffler. Always replace a defective
muffler.
WARNING: Mufflers with catalytic converters
get very hot during operation. Risk of burn or
fire.
WARNING: The muffler decrease the noise
level and point the exhaust gases from the
operator. The exhaust gases are hot and
can contain sparks. Risk of fire.
CAUTION: The spark arrestor spark arrester
screen must be replaced if it is damaged. Do
not use a product if the spark arrestor spark
arrester screen on the muffler is missing or
defective.
CAUTION: If the spark arrestor spark
arrester screen is blocked the product will
too hot. This will cause damage to the
cylinder and piston.
1. Make sure that the muffler is not damaged.
2. Make sure that the muffler is correctly attached to
the product.
3. Some mufflers have a special spark arrestor spark
arrester screen. Clean the spark arrestor spark
arrester screen minimum one a week if your product
has this type of muffler. Use a wire brush.(Fig. 69 )
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 to 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 consists of cooling fins on the cylinder (1) and air
intake (2).
(Fig. 70 )
To clean the air filter
20
1. Remove the air filter cover and remove the air filter.
(Fig. 71 )
2. Clean the air filter with warm soap water. Make sure
that the air filter is dry before you install it.
3. Replace the air filter if it is too dirty to fully clean it.
Always replace a damaged air filter.
4. If your product has a foam air filter, apply air filter oil.
Only apply air filter oil to a foam filter. Do not apply
oil to a felt filter.
Fuel filter
When the engine runs short of fuel supply, make sure
that the fuel tank cap and the fuel filter is not blocked.
(Fig. 72 )
To add grease to the bevel gear
Make sure that the bevel gear is filled 3/4 full with bevel
gear grease.
(Fig. 73 )
To examine the spark plug
CAUTION: Always use the recommended
spark plug type. Incorrect spark plug type
can cause damage to the product.
• Examine the spark plug if the engine is low on
power, is not easy to start or does not operate
correctly at idle speed.
• To decrease the risk of unwanted material on the
spark plug electrodes, obey these instructions:
a) Make sure that the idle speed is correctly
adjusted.
b) Make sure that the fuel mixture is correct.
c) Make sure that the air filter is clean.
• If the spark plug is dirty, clean it and make sure that
the electrode gap is correct, see
on page 21 .(Fig. 74 )
• Replace the spark plug if it is necessary.
To sharpen the saw blade
WARNING: Stop the engine. Use protective
gloves.
• To sharpen the blade correctly, refer to the
instructions that come with the blade.
• Make sure that the product and blade has sufficient
support when you sharpen it.(Fig. 75 )
• Use a 5.5 mm (7/32 in) round file with a file holder.
(Fig. 76 )
• Hold the file at an angle of 15°.
• Sharpen one tooth of the saw blade to the right and
the next tooth to the left, see the illustration.(Fig. 77 )
TECHNICAL DATA
462 - 002 - 07.02.2018