Poulan Pro 418121, Operator'S Manual

12

MAINTENANCE

OIL FILLER

PLUG

OIL LEVEL

OIL 

DRAIN

PLUG

FIG. 16

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.

FIG. 17

TO CHANGE ENGINE OIL (See Figs. 16 and 17)

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.  Be careful not to allow dirt to 

enter the engine.

• 

Refill engine with oil.  See “CHECK ENGINE OIL LEVEL” 

in the Operation section of this manual. 

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.

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 

40°F (4°C).  Check your engine oil level more frequently to 

avoid possible engine damage from running low on oil.
Change the oil after every 25 hours of operation or at 

least once a year if the tiller is not used for 25 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.

TEMPERATURE RANGE ANTICIPATED BEFORE NEXT OIL CHANGE

SAE VISCOSITY GRADES

-20

0

30

40

80

100

-30

-20

4

20

30

40

F

C

-10

10

60

10W-30 / 5W-30

SAE 30

oil_visc_chart5_e(drt)

AIR CLEANER (See Fig. 18)

Service  air cleaner cartridge every twen ty-five hours, more 

often if engine is used in very dusty conditions.
1.  Loosen air cleaner screw.
2.  Remove air cleaner cover.
3.  Carefully remove air cleaner cartridge. Be care ful. Do 

not allow dirt or de bris to fall into carburetor.

4.  Clean by tapping gently on a flat sur face.

NOTE:

 If very dirty or damaged, replace car tridge.

5.  Clean and re place cover. Tighten screw securely.

CAUTION:  Petroleum sol vents, such 

as kerosene, are not to be used to 

clean car tridge.  They may cause de-

te ri o ra tion of the cartridge.  Do not oil 

car tridge.  Do not use pres sur ized air 

to clean or dry car tridge.

AIR 

CLEANER 

SCREW

COVER

AIR CLEAN ER 

CAR TRIDGE

FIG. 18