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14
Adjusting Engine Idle
Idle Speed Adjustment
Place the unit on the ground and 1.
start the engine, and then set throt-
tle control lever to idle postion.
Allow engine to idle 2-3 minutes
until warm.
If a tachometer is available, adjust 2.
idle. Check Specications page for
correct idle speed.
IMPORTANT!
A clean and unrestricted airow is
essential to your pump’s engine perfor-
mance and durability! Before attempt-
ing any carburetor adjustments, inspect
and clean the engine air lter as
described in the Maintenance section
of this manual.
NOTE
Carburetor fuel mixture adjustments
are preset at factory and cannot be
serviced in the eld.
Idle
Adjustment
Screw
Decrease Idle
Increase Idle
Figure 10
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..
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.
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, oth-
erwise severe engine damage may result.
CAUTION!
Never allow the pump to run dry!
Operation without water can perma-
nently damage the pump seals.