17
Spark Arrester Maintenance
WARNING!
Never operate this blower with a damaged or missing muffler or
spark arrester! Operating with missing or damaged exhaust components is
a fire hazard, and can also damage your hearing!
Hard starting or a gradual loss of performance can be caused by carbon
deposits lodged in the spark arrester screen. For maximum performance, the
spark arrester screen should be periodically cleaned as follows. See Figure
16.
1. Remove engine cover to expose muffler. Remove the spark arrester from
the muffler. The screen is press-fit in place.
2. Remove screen from cover.
3. Use a plastic scraper or wire brush to remove carbon deposits from the
arrester screen and wipe clean exhaust base.
4. Inspect the screen carefully, and replace any screen that has been perfo-
rated, distorted, or is otherwise unserviceable.
5. Press the spark arrester screen into the arrestor cover.
If carbon accumulation in the muffler or cylinder are severe, or if you do not
notice an improvement in performance after servicing, have the unit inspected
by an authorized servicing Shindaiwa dealer.
Muffler
Arrester
Screen
Figure 16
Arrester Screen
Cover
Exhaust System
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, emis-
sion, 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 Shin-
daiwa service dealer.
NOTE:
Every unit is run at the factory and the carburetor is set in compliance with emis-
sion regulations. Carburetor adjustments, other than idle speed, must be per-
formed
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, other-
wise severe engine damage may result.
