Craftsman 917.377220 Owner's Manual page 15

ENGINE SPEED
Your engine speed has been factory set.
Do not attempt to increase engine speed
or it may result in personal injury. If you
believe that the engine is running too fast
or too slow, take your lawn mower to an
authorized service center for repair and
adjustment.
CARBURETOR
Your carburetor has a n6n_-adjustable
fixed main jet for mixture control If your
engine does not operate properly due to
suspected carburetor problems, take your
lawn mower to an authorized service
center for repair and/or adjustment.
IMPORTANT; never tamper with the
engine governor, which is factory set for
proper engine speed° Overspeeding the
engine above the factory high speed
setting can be dangerous, if you think the
engine-governed high speed needs
adjusting, contact your nearest authorzed
service center, which has proper
equipment and experience to make any
necessary adjustments.
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