RedMax EBZ8550 Operator's Manual page 14

To do a check of the spark plug
CAUTION: Use the recommended spark
plug. Refer to
An incorrect spark plug can cause damage
to the product.
1. If the product is not easy to start or to operate or if
the product operates incorrectly at idle speed,
examine the spark plug for unwanted materials. To
decrease the risk of unwanted material on the spark
plug electrodes, do these steps:
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.
2. Clean the spark plug if it is dirty.
3. Make sure that the electrode gap is correct. Refer to,
Technical data on page 17 .
4. Replace the spark plug monthly or more frequently if
necessary.
To clean the cooling system
CAUTION: A dirty or blocked cooling system
can make the product too hot, which can
cause damage to the product.
The cooling system includes the cooling fins on the
cylinder and the air intake screen.
• Make sure that the cooling system is not dirty or
blocked.
• Clean the cooling system with a brush weekly or
more frequently if it is necessary.
To do maintenance of the muffler
WARNING: Do not use a product with a
defective muffler.
WARNING: The mufflers become very hot
during and after operation, also at idle
speed. Use protective gloves to prevent
burn injuries.
1. Stop the engine and let the muffler become cool.
2. Replace the spark arrester screen if it is damaged.
14
Technical data on page 17 .
3. Remove the screws (E) and remove the exhaust
duct (D).
Note: The inner surfaces of the muffler contain
chemicals that can cause cancer. Be careful not to
touch these elements if the muffler is damaged.
4. Remove the spark arrester screen (C) and clean it
with a wire brush. Remove dirt from the inlet and
outlet of the muffler with the wire brush. Also,
remove dirt from the exhaust port of the cylinder with
the wire brush.
5. Attach the spark arrester screen (C) and the exhaust
duct (D) with the screws (E). Tighten the screws to
2-3 Nm.
6. Make sure that the muffler is correctly attached to
the product. Tighten the screws (A) and (B) to 8-12
Nm.
To examine the air intake screen
A clogged air intake screen decreases the blow force
and increases the temperature of the engine. An
increased temperature can result in engine failure.
1. Stop the engine.
C
D
E
A
B
962 - 003 - 01.02.2019