M.T.H. Blue Comet Operating Instructions Manual page 26

of the horn. QUICKLY TURN THE POWER BACK ON AGAIN. Your
engine is now locked into NEUTRAL.
NOTE: When locking the engine in the Forward or Reverse positions, the whistle button will
blow the whistle. But when locking the engine into the NEUTRAL position, the whistle button
may turn on or off sounds of the bell, coupler arming or coupler firing depending on the
transformer throttle voltage settings prior to the user's attempt to lock out the engine.
Remember, the whistle doesn't blow in NEUTRAL (unless you programmed it to do so using
Feature 25. See page 21 for details), only the bell rings or the coupler operates in NEUTRAL.
While it doesn't make any difference on how the lockout function operates, you may hear one
of the three different NEUTRAL-activated sounds.
To unlock the engine from the NEUTRAL position, follow the process to
unlock the engine in the Forward or Reverse directions above.
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MTH Blue Comet Operating Manual