Setting Engine Speed - Honda WH15XT Manual De Explicaciones

OPERATION

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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FAST
SLOW
THROTTLE LEVER
SLOW
FAST