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Maintenance - Craftsman 917.378342 Owner's Manual

6.25 horsepower power-propelled 21" rear discharge rotary lawn mower

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1. To start a cold engine, push primer
three (3) times before trying to start.
Use a firm push. This step is not
usually necessary when starting an
engine which has already run for a
few minutes,
2. Hold operator presence control bar
down to the handle and pull starter
handle quickly. Do not allow starter
rope to snap back.
TO STOP ENGINE
, To stop engine, release operator
presence control bar.
NOTE: In cooler weather it may be
necessary to repeat priming steps. In
warmer weather ever priming may cause
flooding and engine will not start. If you
do flood engine, wait a few minutes
before attempting to start and do not
repeat priming steps.
MOWING
TIPS
• Under certain conditions, such as very
tall grass, it may be necessary to raise
the height of cut to reduce pushing
effort and to keep from overloading the
engine and leaving clumps of grass
clippings. It may also be necessary to
reduce ground speed and/or run the
mower over the area a second time.
• For extremely heavy cutting, reduce the
width of cut by overlapping previously
cut path and mow slowly.
• For better grass bagging and most
cutting conditions, the engine speed
should be set in the FAST position.
• When using a rear discharge lawn
mower in moist, heavy grass, clumps of
cut grass may not enter the grass
catcher. Reduce ground speed
(pushing speed) and/or run the lawn
mower over the area a second time.
° If a trail of clippings is left on the right
side of a rear discharge mower, mow in
a clockwise direction with a small
overlap to collect the clippings on the
next pass.
• Pores in cloth grass catchers can
become filled with dirt and dust with
use and catchers will collect less grass.
To prevent this, regularly hose catcher
off with water and let dry before using.
• Keep top of engine around starter clear
and clean of grass clippings and chaff.
This will help engine air flow and
extend engine life.
MULCHING
MOWING
TIPS
IMPORTANT:
For best performance,
keep mower housing
free of built-up
grass and trash. See "CLEANING"
in the
Maintenance
section of this manual.
° The special
mulching blade will recut
the grass clippings many times and
reduce
them in size so that as they fall
onto the lawn they will disperse into the
grass and not be noticed. Also, the
mulched grass
will biodegrade
quickly
to provide nutrients for the lawn.
Always
mulch with your highest
engine
(blade)
speed
as this will provide the
best recutting action of the blades.
• Avoid
cutting
your lawn when it is wet.
Wet grass tends to form clumps and
interferes with the mulching action. The
best time to mow your lawn is the early
afternoon.
At this time the grass has
dried and the newly cut area will not be
exposed to the direct sun.
• For best results,
adjust the lawn mower
cutting height so that the lawn mower
cuts off only the top one-third of the
grass blades.
If the lawn is overgrown it
will be necessary
to raise the height of
cut to reduce pushing effort and to keep
from overloading
the engine and
leaving
clumps
of mulched
grass.
For
extremely
heavy grass,
reduce
your
width
of cut by overlapping
previously
cut path and mow slowly,
MAX 1/3
• Certain
types
of grass and grass
conditions
may require
that an area be
mulched
a second
time to completely
hide the clippings.
When
doing a
second
cut, mow across
or perpendicu-
lar to the first cut path.
• Change
your cutting
pattern
from week
to week.
Mow north to south one week
then change
to east to west the next
week.
This will help prevent
matting
and graining
of the lawn.
9

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