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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.
4.2 WHEEL DRIVE CONTROL ADJUSTMENT
The wheel drive control lever should engage the
transmission when the lever is squeezed back
against the handlebar, and disengage the
transmission when the lever is released. See
Figure 4.4.
FIGURE 4.4
If the transmission does not fully engage or disengage,
adjustment may be performed as follows:
1. Remove rear cover from mower. Refer to
Section “Rear Cover Removal & Installation”.
2. With wheel drive control lever in ‘DISENGAGE’
position (see Figure 4.4), spring on end of wheel
drive control cable should have no tension.
Measure overall length of unextended spring. See
Figure 4.5.
FIGURE 4.5
(Top of transmission; pulley removed for clarity)
3. Engage lever, and roll mower back and forth
several times to ensure clutch dogs are fully
engaged. With lever engaged, measure length of
extended spring. Overall spring length should
increase by 0.090 – 0.110” (3/32 – 7/64”). See
Figure 4.5a.
FIGURE 4.5a
4. To adjust spring extension:
a. Disengage lever.
b. To increase extended spring length, loosen jam
nut, and rotate ferrule below adjustment turnbuckle,
located on lower end of wheel drive control cable,
½ turn out from turnbuckle. Tighten jam nut. See
Figure 4.5b.
c. To decrease extended spring length, loosen jam
nut, and rotate ferrule ½ turn in toward turnbuckle.
Tighten jam nut. See Figure 4.5b.
FIGURE 4.5b
5. Engage lever and recheck extended spring
length. Repeat step 4 as needed.
IMPORTANT: INCORRECT ADJUSTMENT CAN
CAUSE DAMAGE TO THE TRANSMISSION.
GROUND SPEED
CONTROL
WHEEL DRIVE
CONTROL
SLOW
FAST
ENGAGE
DISENGAGE
SPRING HAS NO
TENSION
TRANSMISSION
ENGAGE LEVER
(DISENGAGED)
CABLE
MEASURE
UNEXTENDED SPRING
EXTENDED SPRING – SHOULD BE LENGTH OF UNEXTENDED
SPRING PLUS 0.090 to 0.110” (3/32 to 7/64”) EXTENSION
TRANSMISSION
ENGAGE LEVER
(ENGAGED)
FERRULE
ROTATE FERRULE
OUT TO INCREASE
SPRING LENGTH
ROTATE FERRULE IN
TO DECREASE
SPRING LENGTH
LOOSEN JAM NUT
TURNBUCKLE