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I flooded the motor after installing the brushes.

After seeing that the new brushes reduced performance.

Flooding did not help other than a nice bath for the engine.

Possibly not a good idea, WD40 is still an oil and oil and carbon brushes do not go together. It softens the carbon which clogs the commutator slots. I suggest that you remove the brushes and clean the commutator and brushes with a switch cleaning fluid (or liquid lighter fuel) WARNING FLAMMABLE! and reassemble.

David Y
 
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