Husqvarna 321SP Operator's Manual page 11

Note: Do not attempt any oil maintenance on this
pump. The pump is pre-lubricated and sealed from
the factory. If refilling is required, see an authorized
dealer or service centre.
To check the muffler
WARNING: Inspect periodically, the muffler
for loose fasteners, any damage or corrosion.
If any sign of exhaust leakage is found, stop
using the machine and have it repaired
immediately. Note that failing to do so may
result in the engine catching on fire.
Perform the procedures after every 100 hours of
operation:
1. Remove the muffler, insert a screwdriver into the
vent, and wipe away any carbon buildup. Wipe
away any carbon buildup on the muffler exhaust
vent and cylinder exhaust port at the same time.
2. Tighten all screws, bolts, and fittings.
3. Check and wipe off if any oil or grease left in
between the clutch lining and drum with oil-free and
lead-free gasoline.
To check the cooling system
WARNING: Never touch the cylinder, muffler,
or spark plug with your bare hands
immediately after stopping the engine. The
engine can become very hot when in
operation, and doing so could result in
severe burns.
• When checking the product to make sure that it is
in good condition before using it, check the area
around the muffler and remove any staffs that
attached, in case the muffler is overheated or
even the engine catch on fire.
Maintenance schedule
Note: Make sure you obey the maintenance schedule. The intervals are calculated from daily use of the product.
The intervals are different if you do not use the product each day. Only do the maintenance work that is found in
this manual. Speak to an approved service center about other maintenance work not found in this manual.
• Check the intake air cooling vent and the area
around the cylinder cooling fins for blockage every
25 hours of use, in case of engine overheat or
even product failure. Note that it is necessary to
remove the upper cover and the lower cover in
order to be able to view the upper part of the
cylinder.
To check the grease cups
• Open the upper cap of the grease cup and check
the grease amount. Fill it up if it decreased.
To adjust engine speed
• Although the engine is adjusted before leaving the
factory, it may require readjustment or
maintenance after repeated use. Please consult
the original supplier regarding inspections and
maintenance other than those shown below.
To adjust engine speed
Note: Warm up the engine before adjusting the idle
speed.
• If the engine stops or the pump continues to work
at idle speed with the throttle trigger at the turtle
position, readjust the engine speed with the idle
speed adjustment screw on the left of the
carburetor.
Turn the idle adjustment screw:
• Counter-clockwise to reduce engine speed
• Clockwise to increase engine speed
To replace gear oil
• After first 25 hours of use, replace the gear oil.
After that, replace it after every 100 hours of use
(SAE90, 100cc).
10