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ADJUSTING THE iDLE SPEED
_WARNING:
Wear protective clothing and observe all
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safety instructions to prevent serious personal injury.
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if the engine will not idle properly:
1. Drain the fuel tank and add fresh, properly-mixed
fuel. Refer to
Off and Fuel.
2. Clean the air filter. Refer to Maintaining the Air Filter.
if the engine still will not idle properly, adjust the idle speed:
1. Start the engine. Refer to Starting and Stopping.
2. Move the cruise control to the SLOW position and let the engine
idle. if the engine stops, increase the idle speed. Use a small
Phillips screwdriver to turn the idle speed screw clockwise,
1/8
of a turn at a time, until the engine idles smoothly (Fig. 15).
if the engine still will not idle properly, and any of the following
conditions are true, take the unit to a Sears or other qualified service
dealer:
•
the engine hesitates or stalls on acceleration
there is a loss of engine power
Idle Speed Screw
I
Fig. 15
MAiNTAiNiNG
THE SPARK PLUG
1. Stop the engine and allow it to cool. Grasp the spark plug boot
firmly and pull it from the spark plug.
2. Clean around the spark plug. Remove the spark plug from the
cylinder head with a 5/8-inch socket, turning counterclockwise.
I _hL
! WARNING:
Do not sand blast, scrape or clean spark plug 1
electrodes. Grit in the engine could damage the cylinder.
3. inspect the spark plug. if the spark plug is cracked, fouled or
dirty, replace it with replacement part #753=06193, a Champion
RDJ7J or an equivalent spark plug.
4. Use a feeler gauge to set the air gap at 0.025 in. (0.635 ram)
(Fig. 16).
5. install the spark plug in the cylinder head. Tighten the spark plug
with a 5/8-inch socket, turning it clockwise
until snug.
NOTE: if using a torque wrench, torque to:
110=120 in.olb. (12.3=13.5 N_m). Do not over tighten.
6. Reattach the spark plug boot.
0.025 in.
(0.635 ram}
t
Fig. 16
15
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