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  1. mickynz

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

    Thanks for all your advice. Woodrow, that's comforting to know! Most of my experience is with things I've made myself or repairing less mechanical faults, motors are fairly new territory for me as I never use them in things I make. I can't for the life of me find that sparking formula now...
  2. mickynz

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

    Thanks! I think I'll do that. It does look pretty bad. I wish I could open it or adjust the brushes or even just test the brushes are moving in the holders properly, but it's all riveted shut. The last motor was a mess and by all accounts this brand of portable spa die on a regular basis, so...
  3. mickynz

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

    Thanks! Really? It's new, never been used. It seems very badly made though... The old one's armature was nearly in pieces.
  4. 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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