• Examine the spark arrester screen. Refer to
To do
maintenance on the spark arrester screen on page
18.
• Examine the fuel filter.
• Make sure that the fuel hose is not damaged.
• Make sure that cables and connections on the
product is not damaged.
To adjust the idle speed
• Make sure that the air filter is clean and the air filter
cover is attached before you adjust the idle speed.
• Adjust the idle speed with the idle adjustment screw
T which is identified with "T" mark.
• The idle speed is correct when the engine operates
smoothly in all positions. The idle speed must be
below the speed when the cutting attachment starts
to turn.
1. Turn the idle adjustment screw clockwise until the
cutting attachment starts to turn. (Fig. 50)
2. Turn the idle adjustment screw counterclockwise
until the cutting attachment stops.
To do maintenance on the spark
arrester screen
Use a wire brush to clean the spark arrester screen.
(Fig. 51)
To clean the cooling system
Clean the parts of the cooling system with a brush.
(Fig. 52)
To examine the spark plug
CAUTION: Use the recommended spark
plug. Make sure that the replacement is the
same as the manufacturer supplied part. An
incorrect spark plug can cause damage to
the product.
1. Examine the spark plug when:
a) the engine is low on power.
b) the engine is not easy to start.
c) the engine does not operate correctly at idle
speed.
2. If, the engine is not easy to start or operate, examine
the spark plug for unwanted materials. To decrease
the risk of unwanted material on the spark plug
electrodes:
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.
3. Clean the spark plug if it is dirty. Examine that the
electrode gap is correct. (Fig. 53)
4. Replace the spark plug when it is necessary.
To do the maintenance to the air
filter
To clean the air filter
1. Remove the air filter cover and remove the air filter.
(Fig. 54)
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.
To apply air filter oil to the air filter
CAUTION: Always use special air filter oil on
foam air filters. Do not use other types of oil.
WARNING: Do not get oil on your body.
1. Remove the air filter cover and remove the air filter.
(Fig. 55)
2. Put the air filter in a plastic bag.
3. Put the air filter oil in the plastic bag. (Fig. 56)
4. Push the plastic bag to make sure the oil supplies
equally across the air filter.
5. Push on the air filter, while in the bag, to remove the
air filter oil that is not necessary. Remove the air
filter from the bag.
6. Install the air filter.
To add grease to the bevel gear
Make sure that the bevel gear is filled 3/4 full with bevel
gear grease.
(Fig. 57)
To examine the locknut
CAUTION: Replace the locknut after each
10th use.
1. Turn the locknut counterclockwise to tighten the
locknut. Turn the locknut clockwise to remove the
locknut. (Fig. 58)
2. Make sure that you can not turn the nylon lining of
the locknut with your hands. The nylon lining must
supply a minimum resistance of 1.5 Nm / 1,1 ft/lb.
3. Torque the locknut to 35-50 Nm / 26-36 ft/lb, if the
resistance is below minimum.
18
881 - 001 - 10.10.2018
