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CARBURETOR ADJUSTMENT
The idle speed of the engine is adjustable through the air
filter/muffler cover (Fig. 28).
NOTE: Careless adjustments can seriously damage your
unit. An authorized service dealer should make
carburetor adjustments.
Check FUelMixtUre
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Clean Air Filter
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Change _he ai_t_uel mix_orei This iS o_en mistaken fo_ an
ai_ _il_e_before adjusting _he idle Speed SCreW Refe_to
AdjUst Idle Speed S_ew
I file ¢ hec king_h iX_U clean!
fi I_e_i_he engin still willn o_ idlei a dju st _he idie SpRed
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topping
Instructions
Idle Speed Screw
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3. If the engine appears to be idling too fast, turn the
idle speed screw counterclockwise 1/8 of a turn at
a time (as needed), to reduce idle speed.
Checking the fuel mixture, cleaning the air filter, and
adjusting the idle speed should solve most engine
problems. If not and all of the following are true:
• the engine will not idle
• the engine hesitates or stalls on acceleration
• there is a loss of engine power
Have the carburetor adjusted by an authorized service
dealer.
REPLACING THE SPARK PLUG
Use a Champion RDJ7Y spark plug, or equivalent. The
correct air gap is 0.020 inch (0.5 ram). Remove the plug
after every 25 hours of operation and check its condition.
1. Stop the engine and allow it to cool. Grasp the plug
wire firmly and pull it from the spark plug.
2. Clean around the spark plug. Remove the spark plug
from the cylinder head by turning a 5/8-inch socket
counterclockwise.
3. Replace a cracked, fouled or dirty spark plug. Set
the air gap at 0.020 in. (0.5 ram) using a feeler gauge
(Fig. 29).
4. Install a correctly-gapped spark plug in the cylinder
head. Tighten by turning the 5/8-inch socket
clockwise until snug.
If using a torque wrench torque to:
110-120 in.olb. (12.3-13.5 Nom)
Do not over tighten.
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