Husqvarna 917.29939 - Manual (Page 11)

MAINTENANCE
A
Disconnect spark plug wire before performing any maintenance (except carburetor adjustment) to
prevent accidental starting of engine.
Prevent fires! Keep the engine free of grass, leaves, spilled oil, or fuel. Remove fuel from tank
before tipping unit for maintenance. Clean muffler area of all grass, dirt, and debris.
Do not touch hot muffler or cylinder fins as contact may cause burns.
ENGINE
LUBRICATION
Use only high quality detergent oil rated with API service
classification SG-SL, Select the oil’s SAE viscosity grade
according to your expected temperature.
SAE VISCOSITY GRADES
F -20 0 30 32 40 60 80 100
C -30 - 20 -10 0 10 20 30 40
TEMPERATURE RANGE ANTICIPATED BEFORE NEXT OIL CHANGE
Fig. 11
0!l„v!sc„chart1,„e
NOTE: Although multi-viscosity oils (5W-30,10W-30, etc.)
improve starting in cold weather, these multi-viscosity oils
will result in increased oil consumption when used above
32°F (0°C), Check your engine oil level more frequently to
avoid possible engine damage from running low on oil.
Change the oil after every 50 hours of operation or at
least once a year if the tiller is not used for 50 hours in
one year.
Check the crankcase oil level before starting the engine
and after each five (5) hours of continuous use. Add SAE
30 motor oil or equivalent. Tighten oil filler plug securely
each time you check the oil level,
TO CHANGE ENGINE OIL (See Figs. 11 and 12)
Determine temperature range expected before oil change.
All oil must meet API service classification SG-SL,
• Be sure tiller is on level surface,
• Oil will drain more freely when warm,
• Catch oil in a suitable container,
• Remove drain plug,
• Tip tiller forward to drain oil,
• After oil has drained completely, replace oil drain plug
and tighten securely,
• Remove oil filler plug. Be careful not to allow dirt to
enter the engine,
• Refill engine with oil. See “FILL ENGINE WITH OIL ”
in the Operation section of this manual.
Fig. 12
AIR CLEANER (See Fig. 13)
Service air cleaner cartridge every 50 hours, more often
if engine is used in very dusty conditions,
•
Loosen air cleaner screws, one on each side of
cover,
• Remove air cleaner cover,
• Carefully remove air cleaner cartridge. Be careful. Do
not allow dirt or debris to fall into carburetor,
• Clean by tapping gently on a flat surface,
• If very dirty or damaged, replace cartridge,
• Clean and replace cover. Tighten screws securely.
A
CAUTION: Petroleum solvents, such as
kerosene, are not to be used to clean
cartridge. They may cause deterioration
of the cartridge. Do not oil cartridge.
Do not use pressurized air to clean or
dry cartridge.
COVER
AIR
CLEANER
SCREW
AIR CLEANER
CARTRIDGE
Fig. 13
11