Maintenance; To Check The Air Cleaner; To Check The Fuel ! Lter; To Check The Spark Plug - Husqvarna 321S15 Operator's Manual

321S15/25

MAINTENANCE

WARNING
• Make sure that the engine has stopped and is cool
before performing any service to the machine. Contact
with hot muf! er may result in a personal injury.
• Do not modify the sprayer or dismantle the engine.
• When replacing parts please use Husqvarna original
parts or designated parts.

To check the air cleaner

• After every 25 hours of operation, please remove the
air cleaner cover (1) and inspect the air cleaner (2). If
it is too dirty, wash it carefully in warm water containing
a neutral detergent, and return it to its original position
after drying it thoroughly.
• If the air cleaner (2) is distorted or damaged, please
replace it with a new one.
1
IMPORTANT
• If the air cleaner is blocked, the ef" ciency of the en-
gine will be reduced. In addition, the engine interior
will suffer abnormal wear if operated without the " lter
or if continually operated with a distorted or damaged
" lter " tted.

To check the fuel ! lter

• After every 25 hours of operation, empty the fuel tank,
detach the fuel " lter (3) from the tank, and remove all
dirt. If the " lter is too clogged, please replace it with
a new one.
GB-14
2
3
IMPORTANT
• If the fuel " lter is clogged, the engine speed may be
limited or speed ! uctuations may occur.
• If the engine is operated without a fuel " lter, dirt will ac-
cumulate in the carburetor and cause it to malfunction.

To check the spark plug

WARNING
• Do not touch the spark plug with your bare hands im-
mediately after operation, as there is the risk of burns
due to high temperature.
• After every 25 hours of operation, detach the spark
plug and remove dirt from the electrodes with a wire
brush or similar.
• The correct electrode gap is 0.6 to 0.7mm.
• When replacing plugs, please use designated items.
0.6~0.7mm
IMPORTANT
• If too much fuel is absorbed or poor quality oil is used,
the spark plug electrodes become dirty, making the
engine harder to start.
• Note that using any spark plug other than those
designated may result in the engine failing to operate
properly or in the engine becoming overheated and
damaged.
• To install the spark plug, " rst turn the plug until it is
" nger tight, then tighten it a quarter turn more with a
socket wrench.
TIGHTENING TORQUE:

To adjust the engine speed

• Although the engine is adjusted on leaving the factory,
after repeated use it may sometimes require readjust-
ment or maintenance. Please consult your original
supplier regarding inspections and maintenance other
than those shown below.
14.7 to 21.6 N.m.
(150 to 220 kgf-cm)