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Spark Plugs - Husqvarna LTH1742 Owner's Manual

Husqvarna lawn tractor owner's manual
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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.
AIR FILTER (See Fig. 14)
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 knob and cover.
Remove wing nut and air cleaner from base.
TO SERVICE PRE-CLEANER
Slide foam pre-cleaner off cartridge.
Wash it in liquid detergent and water.
Squeeze it dry in a clean cloth. Allow it to dry.
Saturate it in engine oil. Wrap it in clean, absorbent
cloth and squeeze to remove excess oil.
TO SERVICE CARTRIDGE
Replace a dirty, bent, or damaged cartridge.
NOTE: Do not wash the paper cartridge or use pressurized
air, as this will damage the cartridge.
Reinstall the pre-cleaner (cleaned and oiled) over the
paper cartridge.
Reassemble air cleaner, wing nut, cover and tighten
knob securely.
AIR CLEANER
COVER
FOAM
PRE-CLEANER
AIR CLEANER
PAPER CAR TRIDGE
AIR
SCREEN
MAINTENANCE
COVER KNOB
WING NUT
RUBBER
GROMMET
AIR CLEAN ER
BASE
OIL FILL CAP/
DIPSTICK
FIG. 14
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. 15)
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.
CLAMP
FUEL
FILTER
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.
18
CLAMP
FIG. 15

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