I read a post that is probably a couple of years old where Marty Fitzhenry will give an MTH smoke unit a "hot shot" with a 9v battery if the smoke unit motor does not run. It brings the old motor to life if it starts to run with a hot shot. My question to Marty, if he sees this post, is, do you do the hot shot while the motor is installed on the engine or do you remove the motor from the engine (including removing the wiring) and then do the hot shot? Please advise.
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