Most Lionel engines have a small slider switch which can turn off the smoke generator. Check to see that the switch is in the ON position. Check the engine manual (available from Lionel's website) for the location of the switch.
Also, if the smoke generator is always on and no fluid had been used in the generator, it will eventually burn out. Replacement smoke generators are available from Lionel.
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Most Lionel engines have a small slider switch which can turn off the smoke generator. Check to see that the switch is in the ON position. Check the engine manual (available from Lionel's website) for the location of the switch.
Also, if the smoke generator is always on and no fluid had been used in the generator, it will eventually burn out. Replacement smoke generators are available from Lionel.