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Section 4 - REPAIR & ADJUSTMENTS
WARNING
DO NOT attempt any maintenance,
adjustments
or
service with engine and blade running. STOP engine
and blade. Disconnect
spark plug wire and secure
away from spark plug. Engine and components
are
HOT. Avoid serious burns, allow sufficient time for all
components to cool. Wear heavy leather gloves when
handling or working around cutting blades. Blades
are extremely sharp and can cause severe injury.
2. Replace the blade if it is badly chipped, bent,
noticeably out of balance or has cracks or notch in
either tip. See Figure 4.1 & 4.1A. Replace with new
blade.
WARNING
DO NOT use a cutting blade that shows signs of I
excessive
wear
or
damage.
Refer
to
Section l
"MOWER
BLADE REPLACEMENT"
for proper bladel
inspection and service
procedures.
4.1
MOWER BLADE REPLACEMENT
4.1.1. STANDARD BLADE WEAR LIMIT
1. Inspect blade frequently for signs of excessive wear
or damage. See Figure 4.1.
4.1.2.
BLADE SHARPENING
1. Disconnect spark plug wire and secure end away
from plug.
FNEWBLADE
IMPORTANT:
Drain fuel tank before tipping
mower.
""--L
DO NOT tip machine with carburetor or spark plug down.
I
_
WEARLIMIT
Oil from crankcase will saturate the air filter and cause the
-'-._J/
C---{NOTCHSTARTS)
engine
to
be
hard
to
start
or
not
start
at
all.
If
._
/_"
|
contamination
does occur, the air filter will have to be
_
replaced.
DANGEROUS
CONDITION
!
"_--_.._dJ
DO NOTUSEON MOWER! 2. Tilt mower up on its rear wheels.
Do not tilt
,_,_
_
[--REPLACE
WITH NEW
mower with spark plug or carburetor down.
..._
.....
3. Remove blade. See Figure 4.3: ...........................................
-t'----..
i MAKE
SORE
THAT i
"I"_==_....,._
i
BLADE HUB IS
i
! SEATED
:
,_,_...,__._.._
_
BLADE
i
BETWEEN
HUB
" FLANGES
FIGURE 4,1
I'_'_1
" ............................................
4.1.1.A. NINJA BLADE WEAR LIMIT
1. Inspect blade frequently for signs of excessive wear
or damage. See Figure 4.2.
NEW BLADE
WEAR LIMIT.
CRACKS OR
NOTCHES
BEGIN TO
APPEAR ON TIP
FIGURE 4.3
FIGURE 4.2
14
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