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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 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.
135-hour Maintenance
Every 135 hours of operation,
remove and clean the muffler.
WARNING!
Never operate this trimmer
with a damaged or missing mufer
or spark arrester! Operating with
missing or damaged exhaust
components is a re hazard, and
can also damage your hearing!
Remove the spark plug boot.1.
With a 3 mm hex wrench remove 2.
the 1 muffler cover and 3 engine
cover screws and the engine cover.
See Figure 30.
With a Phillips type screwdriver 3.
remove the 5 screws holding the
spark arrester screen and cover to
the muffler. See Figure 30.
Remove the screen and clean it with 4.
a stiff bristle brush.
With a 4 mm hex wrench remove 5.
the 3 muffler bolts and the muffler.
See Figure 30.
Inspect the cylinder exhaust port for 6.
any carbon buildup.
Gently tap the muffler on a wood 7.
surface to dislodge any loose
carbon.
Engine Cover
Screws
IMPORTANT!
If you note excessive carbon buildup,
consult with an authorized Shindaiwa
servicing dealer.
Reassemble the spark arrester, 8.
muffler and engine cover in the
reverse order of disassembly.
Figure 30
Mufer
Cover
Engine
Cover
Mufer
Cover Screw
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.
Spark Arrester
Screen
Mufer
Gasket
Mufer
Spark Arrester
Cover
Gasket
Screws
Mufer
Screws
Outlet