Husqvarna 321SP Operator's Manual page 12

Maintenance procedure
Inspect the whole unit for damage,
leakage or spillage
Inspect all accessible fasteners
Inspect all screws/nuts/bolts
Check the hoses and fittings
Clean for any debris
Inspect and clean the fuel tank
Inspect and clean the fuel filter
Inspect and clean the air cleaner
Check the operation of the throttle
lever and stop switch
Empty the fuel tank
Apply grease to the plunger
Clean or re-adjust the spark plug
gap
Inspect the muffler for damage.
Clean the muffler and the cylinder
exhaust port
Clean the cylinder fins and intake air
cooling fan
Clean chemical filter
Check the spray nozzles
Check the level of the pump oil
Replace the gear oil
Check the grease cups
Clean the pump
Daily Weekly
Overall
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Engine
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Spray nozzles and chemical filter
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Pump
Monthly
Tighten or replace if necessary
Tighten or replace if necessary.
Adjusting screws are not
included.
Make sure the gap is
0.6-0.7mm (.025in).
Replace if necessary
Replace if necessary
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Refill if necessary
Spray 5L of clean water to
clean the pump after use
Note
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