Operation - Honda WB20XT Owner's Manual

6.

OPERATION

Never use the pump for muddy water, rejected oil, wine, etc.
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.
THROTTLE LEVER
FAST SLOW
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