Carburetor Adjustment; High Altitude Operation - Shindaiwa AH242 Owner's/Operator's Manual

Maintenance (continued)
Muffler and spark arrester maintenance
Engine Cover
Screws
Muffler and spark arrester maintenance
If the engine becomes sluggish and low
on power, check and clean the spark
arrester screen.
WARNING!
Never operate the unit with
a damaged or missing muffler or
spark arrester! Operating with a
missing or damaged spark arrester
is a fire hazard and could also dam-
age your hearing.

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.
18
Engine Cover
Muffler
Cover
Screw
Muffler gasket
1. Remove the spark plug boot.
2. With a 3 mm hex wrench remove
the one muffler cover screw, three
engine cover screws, the engine
cover and muffler cover.
3. With a cross-head screwdriver
remove the five screws holding the
spark arrester screen and cover to
the muffler.
4. Remove the screen and clean it with
a stiff bristle brush.
Muffler Cover
Muffler
screws
Muffler
Gasket
Spark arrester
Spark arrester
screen
5. With a 4 mm hex wrench remove the
three muffler bolts and the muffler.
6. Inspect the cylinder exhaust port for
any carbon buildup.
7. Gently tap the muffler on a wood
surface to dislodge any loose carbon.
8. Reassemble the spark arrester, muf-
fler and engine cover in the reverse
order of disassembly.
IMPORTANT!
If you note excessive carbon buildup, con-
sult with an authorized Shindaiwa servicing
dealer.
Screws
Outlet
cover