Honda Harmony H2013HDA Owner's Manual page 34

OPERATION
5.
6.
7.
Holding the ignition key in the START position for more than five
seconds may damage the starter.
If the engine fails to start, wait at least ten seconds before trying
again. If you can't get the engine to start after multiple tries, refer
to
Troubleshooting
on page 103.
After the engine has started, slowly move the throttle lever from
CHOKE to a point halfway between SLOW and FAST while the
engine warms up.
Once the engine has warmed, you should keep
the throttle in the FAST position while mowing.
This keeps the blades spinning at the proper
speed (when the PTO is ON) and provides the
best cut quality.
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Do not use the throttle lever to adjust the lawn tractor
ground speed. Use the shift lever to select a different speed instead.
Slowing the lawn tractor's ground speed with the throttle lever causes
the blades to spin slower, and cut quality will suffer.
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