Hi,
ok so you're sure the batteries are ok, and the charger is charging the batteries ,
check the battery connections on the terminal are not loose , they must be tight but don't overdo it,
are the brushes ok ? do they move ok within the motor ? sometimes they can stick therefore you lose power and speed,
Lastly but can cause problems is the speedpot, does it have a lot of up and down movement ? you will be suprised the problems they can cause.
~Regards
GeWiz.
Testimonial: "Thanks very much, I'll try those fix its"
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