Maintenance - Craftsman 850 Series Owner's Manual

Disconnect spark plug wire before performing any maintenance (except car bu re tor adjustment) to prevent
accidental start ing of engine.
Prevent fires! Keep the engine free of grass, leaves, spilled oil, or fuel. Re move 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 vis cos i ty grade
according to your expected temperature.
SAE VISCOSITY GRADES
10W-30 / 5W-30
-20 0 30
F
C -20
-30 -10
TEMPERATURE RANGE ANTICIPATED BEFORE NEXT OIL CHANGE
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. 17and 18)
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.
• Use a funnel to prevent oil spill on tiller, and catch oil
in a suitable con tain er.
• Remove drain plug. For easier removal of plug use
7/16 12 Pt. socket with extension.
• Tip tiller forward to drain oil.
• After oil has drained completely, replace oil drain plug
and tighten securely.
• Remove oil filler plug.
• Refill engine with oil. See "CHECK ENGINE OIL LEVEL "
in the Operation section of this manual.

MAINTENANCE

SAE 30
40 60 80
4 10
20 30
oil_visc_chart5_e(drt)
FIG. 17
OIL
DRAIN
PLUG
100
40
AIR CLEANER (See Fig. 19)
Service air cleaner cartridge every twenty-five 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 care ful. Do
not allow dirt or de bris to fall into carburetor.
• Clean by tapping gently on a flat surface.
• If very dirty or damaged, replace cartridge.
• Clean and re place cover. Tighten screws securely.
IMPORTANT: PETROLEUM SOLVENTS, SUCH AS KER O SENE,
ARE NOT TO BE USED TO CLEAN THE CAR TRIDGE. 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
13
OIL LEVEL
OIL FILLER
PLUG
FIG. 18
Air Clean er
Car tridge
FIG. 19