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21
ENGLISH
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.
High Altitude Adjustment
This engine has been factory adjusted to maintain satisfactory start-
ing, emission, and durability performance up to 1,000 feet above mean
sea level (MSL). To maintain proper engine operation above 1,000
feet MSL the carburetor must be adjusted by an authorized Shindaiwa
service dealer.
IMPORTANT
If the engine is adjusted for operation above 1,000 feet MSL, the
carburetor must be re-adjusted when operating the engine below
1,000 feet MSL, otherwise severe engine damage can result.
Level 2.
Tools required: Screwdriver, tachometer
Parts required: None.
NOTE
Every unit is run at the factory and the carburetor is set in com-
pliance with emission regulations. This carburetor does not have
acceleration adjustment needle.
1. Before adjusting the carburetor, clean or replace the air lter and
spark arrestor screen and install blower pipes.
2. Start engine and run for several minutes to reach operating
temperature.
3. Stop engine. Turn red HI speed needle (A) CCW (counter clock-
wise) to stop.
4. Idle Speed Adjustment with tachometer.
•Start engine and turn “idle” speed adjustment screw (B) to idle
RPM found on page 24 “Specications” section of this manual.
5. Accelerate to full throttle for 2-3 seconds to clear excess fuel
from engine then return to idle. Accelerate to full throttle to
check for smooth transition from idle to full throttle. If engine
stops or stalls after full warm up, return the unit to your autho-
rizedShindaiwa dealer for repair.
6. Check HI speed RPM at W.O.T. (Wide Open Throttle). HI speed
RPM should be set to specications found on page 24 “Specica-
tions” of this manual.
7. Check idle speed and reset if necessary.
A
B