Poulan Pro PB21H42, Operator'S Manual

18

CLEANING

•     Clean engine, battery, seat, fi nish, etc. of all foreign 

matter.

•      Keep fi nished surfaces and wheels free of all gasoline, 

oil, etc.

•      Protect painted surfaces with automotive type wax.

We do not recommend using a garden hose or pressure 
washer to clean your tractor unless the engine and trans-
mission are covered to keep water out. Water in engine or 
transmission will shorten the useful life of your tractor.  Use 
compressed air or a leaf blower to remove grass, leaves 
and trash from tractor and mower.

MAINTENANCE

MUFFLER   

Inspect and replace corroded muffl er and spark arrester 
(if equipped) as it could create a fi re hazard and/or dam-
age.

SPARK PLUGS 

Replace spark plugs at the beginning of each mowing 
season or after every 100 hours of operation, whichever 
occurs fi rst.  Spark plug type and gap setting are shown in 
“PROD UCT SPECIFICATIONS” section of this manual.

IN-LINE FUEL FILTER  (See Fig. 14)

The fuel fi lter should be replaced once each season.  If fuel 
fi lter becomes clogged, ob struct ing fuel fl ow to car bu re tor, 
re place ment is re quired.
•      With engine cool, remove fi lter and plug fuel line sec-

 tions.

•      Place new fuel fi lter in position in fuel line with arrow 

pointing towards carburetor.

•     Be sure there are no fuel line leaks and clamps are 

properly positioned.

•      Immediately wipe up any spilled gasoline.

00667

CLAMP

FUEL
FILTER

CLAMP

FIG. 14

CLEAN AIR SCREEN

Air screen must be kept free of dirt and chaff to prevent 
engine dam age from overheating.  Clean with a wire brush 
or compressed air to re move dirt and stubborn dried gum 
fi bers.

CLEAN AIR INTAKE/COOLING AREAS

To insure proper cooling, make sure the grass screen, 
cooling fi ns, and other external surfaces of the engine are 
kept clean at all times.

Every 100 hours of operation (more often under extremely 
dusty, dirty conditions), remove the blower housing and 
other cooling shrouds. Clean the cooling fi ns and external 
surfaces as necessary. Make sure the cooling shrouds are 
reinstalled.

NOTE:  Operating the engine with a blocked grass screen, 
dirty or plugged cooling fi ns, and/or cooling shrouds re moved 
will cause engine damage due to overheating.

bottom fi tting of the drain valve. 

•      Refi ll engine with oil through oil fi ll dipstick tube.  Pour 

slowly.  Do not overfi ll.  For approximate capacity see 
“PRODUCT SPECIFICATIONS” section of this man-
 u al.

•      Use gauge on oil fi ll cap/dipstick for checking level. 

AIR FILTER 

Your engine will not run properly using a dirty air fi lter. 
Service air cleaner more often under dusty conditions. 
See Engine Manual.

ENGINE OIL FILTER

Replace the engine oil fi lter every season or every other 
oil change if the tractor is used more than 100 hours in 
one year.