- Honda Water Pump WP20X, WP30X Owner's Manual

OPERATION
7. If the choke lever was moved to the CLOSED position to start the
engine, gradually move
it to the OPEN position as the engine warms
UP-
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CHOKE LEVER
SETTING ENGINE SPEED
After starting the engine, move the throttle lever to the FAST position
for self-priming, and check pump output.
Pump output is controlled
by adjusting engine speed. Moving the
throttle lever in the FAST direction
will increase pump output, and
moving the throttle lever
in the SLOW direction will decrease pump
output.
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