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  1. mickynz

    How much commutator/brush sparking, is 'normal' in a new motor?

    Hi, I'm fixing a portable spa for someone, the blower motor (universal) had gone. The brand new exact replacement gives off a surprising amount of sparks between the brushes and commutator. While I know sparking isn't abnormal as such, electric motors aren't really my thing and I'm not sure if...

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