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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
Do not adjust carburetor unless necessary. If you have difculty,
see your Shindaiwa dealer.
Before Adjustment
Check that:
• Air lter is clean and properly installed.
• Spark arrestor screen is free of carbon.
• Blower pipes are installed.
Start engine, run at idle for one minute.
Complete warm up by running at full throttle for 5 minutes, operating
choke twice to clear air from carburetor chambers.
Check idle speed and reset if necessary. If a tachometer is available,
idle speed screw (A) should be set to the specications found on Page
22 "Specications" of this manual. Turn idle screw (A) clockwise to
increase idle speed; counter clockwise to decrease idle speed.
Use a tachometer to adjust idle speed to specications found on page 22.
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