Honda UMK450T Owner's Manual page 38

2.To start a cold engine, move the choke lever to the CLOSED position.
To restart warm engine, leave the choke lever in the OPEN position.
CLOSED
OPEN
3.Press the priming pump several times until the priming pump is filled
with fuel.
Even if the priming pump is pressed too many times, the extra fuel
will return to the fuel tank.
If the priming pump is not pressed enough, the engine may not start.
PRIMING PUMP
CLOSED
OPEN
CHOKE LEVER
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