Shindaiwa Articulated Hedge AHS254 - Manual (Page 21)

21
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.
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.
Adjusting Engine Idle
The engine must return to idle speed
whenever the throttle trigger is
released. Idle speed is adjustable, and
must be set low enough to permit the
engine clutch to disengage the cutting
attachment.
wARnInG!
The cutting attachment
must NEVER move at engine idle! If
the idle speed cannot be adjusted by
the procedure described here, return
the unit to your Shindaiwa dealer for
inspection.
Idle Speed Adjustment
1. Place the unit on the ground, then
start the engine, and then allow it to
idle 2-3 minutes until warm.
2. If the attachment moves when the
engine is at idle, reduce the idle
speed by turning the idle adjustment
screw counter-clockwise.
3. If a tachometer is available, adjust
idle. Check Specifications page for
correct idle speed
nOTE:
Carburetor fuel mixture adjustments
are preset at factory and cannot be
serviced in the field.
Maintenance (continued)
Long Term Storage
Whenever the unit will not be used for
30 days or longer, use the following pro-
cedures to prepare it for storage:
■
Clean external parts thoroughly and
apply a light coating of oil to all metal
surfaces.
■
Drain all the fuel from the carburetor
and the fuel tank.
To do so:
1. Prime the primer bulb until no more
fuel is passing through.
2. Start and run the engine until it stops
running.
3. Repeat steps 1 and 2 until the engine
will no longer start.
■
Remove the spark plug and pour
about 1/4 oz. of engine oil into the
cylinder through the spark plug hole.
Slowly pull the recoil starter 2 or 3
times so oil will evenly coat the inte-
rior of the engine. Reinstall the spark
plug.
■
Before storing the unit, repair or
replace any worn or damaged parts.
■
Remove the air cleaner element from
the carburetor and clean it thor-
oughly with soap and water. Let dry
and reassemble the element.
■
Store the unit in a clean, dust-free
area.
CAUTIOn!
Gasoline stored in the carbure-
tor for extended periods can cause
hard starting, and could also lead to
increased service and maintenance
costs.
IMPORTAnT!
All stored fuels should be stabilized with
a fuel stabilizer such as STA-BIL™.
nOTE:
Damage resulting from stale or con-
taminated fuel is not covered by the
Shindaiwa warranty policy.
Idle
Ajust-
ment
Screw