Jonsered JNA19H48B, Owner'S Manual

Page: 19 / 48

19
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.
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.
FIG. 17
FOAM
PRE-CLEANER
KNOBS
COVER
CAR TRIDGE
FUEL
FILTER
CLAMP
CLAMP
FIG. 18
IN-LINE FUEL FIL TER (See Fig. 18)
The fuel fi lter should be re placed once each season. If fuel
fi l
ter 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
point ing towards carburetor.
• Be sure there are no fuel line leaks and clamps are
properly positioned.
• Immediately wipe up any spilled gas o line.
AIR FILTER (See Fig. 17)
Your engine will not run properly using a dirty air fi lter. Clean
the foam pre-cleaner after every 25 hours of op er a tion or
every season. Service paper cartridge every 100 hours of
operation or every season, whichever occurs fi rst.
Service air cleaner more often under dusty conditions.
• Remove knobs and cover.
TO SERVICE PRE-CLEANER
• Wash it in liquid detergent and water.
• Squeeze it dry in a clean cloth.
• Saturate it in engine oil. Wrap it in clean, absorbent
cloth and squeeze to remove excess oil.
• If very dirty or damaged, replace pre-cleaner.
TO SER VICE CARTRIDGE
• Clean cartridge by tap ping gen tly on fl at surface. If
very dirty or damaged, replace cartridge.
• Reinstall precleaner cartridge, cover and secure with
knobs.
IMPORTANT: PETROLEUM SOLVENTS, SUCH AS KEROSENE,
ARE NOT TO BE USED TO CLEAN THE CARTRIDGE. THEY
MAY CAUSE DETERIORATION OF THE CARTRIDGE. DO NOT
OIL CARTRIDGE. DO NOT USE PRESSURIZED AIR TO CLEAN
OR DRY CARTRIDGE.
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.
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.