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Section 4 - ADJUSTMENTS & REPAIR
WARNING
Before attempting any adjustments or repairs, STOP
the engine, remove the spark plug wire from the
spark plug and secure wire away from plug.
4. Sharpen blade on a grinding wheel at an angle of
22 to 28 degrees. DO NOT sharpen blade beyond
original cutting edge. See Figure 4.4.
FIGURE 4.4
5. Check blade for balance. If necessary, correct
balance by grinding heavy end of blade.
6. Reinstall blade. Refer to Figure 4.1. Check torque
of blade retaining cap screw. Recommended torque
should be 30 to 40 ft. lbs.
NOTE: The following sections 4.2 through
4.4 are for self-propelled models only.
4.2 WHEEL DRIVE CONTROL ADJUSTMENT
1. The wheel drive control is properly adjusted when
there is 1/16” to 1/8” clearance between the inside of
the spring hook and the inside of the clutch cable
eye with the wheel drive control released. See
Figure 4.5.
FIGURE 4.5
2. To adjust, unhook upper spring from cable eye
and rotate spring in direction required to extend or
shorten spring length.
3. Rehook upper spring to cable eye and check
clearance. Repeat procedure if required.
NOTE: The vinyl spring cover should be kept over the
spring at all times except for adjustments.
4. If the wheel drive control fails to return quickly to
the “OFF” position when released, check for binding
at the cable holdings located on the side of the right
handle. The upper clip should be located 2” below
the upper knob; the lower clip should be 4” above
the lower knob. The cable should slide freely with
the clips installed at these locations.
BLADE
TIP
DO NOT SHARPEN
BEYOND ORIGINAL
CUTTING EDGE
22 TO 28º
ORIGINAL CUTTING EDGE
END VIEW OF
BLADE ASSEMBLY
CLUTCH CABLE
VINYL SPRING COVER
1/16” TO 1/8”
CLEARANCE
UPPER
SPRING
LOWER
SPRING
CLUTCH
CABLE EYE
SPRING HOOK
CABLE
CLUTCH CABLE EYE
SPRING