Honda GCV520 Owner's Manual page 17

ELECTRIC STARTER (applicable engine types):
Turn the key to the START position, and hold it there until the engine
starts.
If the engine fails to start within 5 seconds, release the key, and wait
at least 10 seconds before operating the starter again.
Using the electric starter for more than 5 seconds at a time will
overheat the starter motor and can damage it.
When the engine starts, release the key, allowing it to return to the
ON position.
5. If the throttle lever has been moved to the CHOKE position to start
the engine, gradually move it to the SLOW position as the engine
warms up.
THROTTLE LEVER
OPERATION
S S L L O O W W
CHOKE
15