Shindaiwa X7501970601 - Manual (Page 16)

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Combustion chamber should be decarbonized, and the valve clearance should be adjusted. It is highly recommended
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that this is done by a Shindaiwa-trained service technician.
Replace the spark plug annually: Use only the type recommended in the ”Specifications” section or an equivalent
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resistor type spark plug of the correct heat range. Set spark plug electrode gap to 0.6 mm (0.024 in).
135 Hour Valve Adjustment
Adjusting Engine Idle Speed
IMPORTANT!
A clean and unrestricted airflow is
essential to your blower’s engine
performance and durability! Before
attempting any carburetor adjustments,
inspect and clean the engine air filter as
described in the maintenance section of
this manual.
Idle Increase
Idle Decrease
Idle Adjustment
Screw
Place the unit on the ground and 1.
start the engine, then allow it to idle
2-3 minutes until warm.
If a tachometer is available, the
2.
engine idle speed should be final
adjusted to 2,000 (±200) RPM. See
Figure 15.
NOTE:
Carburetor fuel mixture adjustments are
preset at factory on units with emission
control systems and cannot be serviced
in the field.
IMPORTANT!
Blower tubes and the air cleaner must
be in place while adjusting engine idle!
Engine idle speed will also be affected
if the blower tubes are blocked or incor-
rectly installed!
Carburetor Adjustment
Engine Break-In
New engines must be operated a minimum duration of two tanks of fuel break-in before carburetor adjustments can be
made. During the break-in period your engine performance will increase and exhaust emissions will stabilize. Idle speed can
be adjusted as required.
NOTE:
Every unit is run at the factory and the carburetor is set in compliance with emission regulations. Carburetor adjustments,
other than idle speed, must be performed by an authorized Shindaiwa dealer.
IMPORTANT!!
If the engine is adjusted for operation above 1,100 feet ASL, the carburetor must be re-adjusted when operating the
engine below 1,100 feet ASL, otherwise severe engine damage may result.
High Altitude Operation
This engine has been factory adjusted to maintain satisfactory starting, emission, and durability performance up to
1,100 feet above sea level (ASL) (96.0 kPa). To maintain proper engine operation and emission compliance above
1,100 feet ASL the carburetor may need to be adjusted by an authorized Shindaiwa service dealer.
IMPORTANT!
The valve clearance should be adjusted. It is highly recommended that this is done by a Shindaiwa-trained service
technician.
Figure 15