The muffler keeps noise levels to a minimum and sends
exhaust fumes away from the operator.
• Make sure that the muffler is correctly attached to
the product and is not damaged. (Fig. 53)
To clean the cooling system
• Clean the air intake (A) on the starter and the cooling
fins (B) on the cylinder with a brush. (Fig. 54)
To do a check of the spark plug
CAUTION: Use the recommended spark
.
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 15
. (Fig. 55)
4. Replace the spark plug monthly or more frequently if
necessary.
To apply grease to the two-piece shaft
• Apply grease to the end of the drive shaft after each
30 hours of operation. (Fig. 56)
To clean the air filter
1. Remove the air filter cover and remove the air filter.
(Fig. 57)
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 oil to the foam air filter
CAUTION: Always use Husqvarna special
air filter oil. Do not use other types of oil.
WARNING: Put on protective gloves. The air
filter oil can cause skin irritation.
1. Put the foam air filter in a plastic bag.
2. Put the oil in the plastic bag.
3. Rub the plastic bag to supply the oil equally across
the foam air filter.
4. Push the unwanted oil out of the foam air filter while
in the plastic bag. (Fig. 58)
To adjust the throttle cable
1. Make sure that the throttle cable is tight and gives no
gas to the product.
2. Adjust the nut on the throttle cable. (Fig. 59)
3. Tighten the locknuts.
Troubleshooting
The engine does not start
Check
Possible cause
Procedure
Stop switch.
The stop switch is in the stop posi-
tion.
Let an approved service agent re-
place the stop switch.
Starter pawls.
The starter pawls cannot move free-
ly.
Remove the starter cover and clean
around the starter pawls. See
.
Let an approved service agent help
you.
Fuel tank.
Incorrect fuel type.
Drain the fuel tank and fill with cor-
rect fuel.
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1190 - 002 - 08.09.2020
