Brushes can be found at most hardware stores but before I opened it up to replace them I would hook it up to my car battery first. A weak starter is often the battery, not the starter. After John Buckner took a bunch of us by the hand and showed us the 18 volt battery found at Harbor Freight for $10.00 plus the fast charger for it at $5.00 there are a gang of us now using them. Talk about something that just plain works!!