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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 cuttingblade that shows signs of
excessive wear or damage. Refer to Section
"MOWER BLADE REPLACEMENT" for proper blade
inspectionand serviceprocedures.
4.1
MOWER BLADE REPLACEMENT 4.1.2. BLADE SHARPENING
4.1.1. STANDARD BLADE WEAR LIMIT 1. Disconnect spark plug wire and secure end away
1. Inspect blade frequently for signs of excessive from plug.
wear or damage. See Figure 4.1.
IMPORTANT: Drain fuel tank before tipping mower.
F NEW BLADE DO NOT tip machine with carburetor or spark plug down.
""-L Oil from crankcase will saturate the air filter and cause the
I_ WEARLIMIT engine to be hard to start or not start at all. If
-,-,_J r--(NOTCH STARTS) contamination does occur, the air filter will have to be
,__ ._ replaced.
DANGEROUSCONDITION7 2. Tilt mower up on its rear wheels. Do not tilt
"_'-_._.._J__/_' DO NOT USE ON MOWER ! mower with spark plug or carburetor down.
• ""_" ,--REPLACE WITH NEW ..........
_. /BLADE" 3. Nemove Dlaae. :see i-igure 4._. . .
BLADE i BETWEEN i
HUB FLANGES i
FIGURE 4.1
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
"'_/_f ____ "_ ._ _ BEGIN TO
_.___: "_PPEAR ON TIP
"\'_ DO NOT USE A BLADE IN
THIS CONDITION !
I
,ConcaveSi0eUp,/
i_ I CAPSCREW
FIGURE 4.3
FIGURE 4.2
14