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The Black & Decker MM875 is an electric lawn mower with a 12 Amp motor, designed for smaller yards up to 1/4 of an acre, featuring a 19-inch deck, adjustable handle, and three cutting modes: mulch, rear bag, and discharge.

Servicing mower, maintaining motor

Is the motor brushless? Any other key maintenance to keep it running quietly and at full power? I don't even know where to look for this, it's not in the manual.

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1 Answer

This motor does have two brushes. The Black and Decker part number for the brushes is 242273-00. You may also need the brush inserts that hold the brushes; it is part number 242274-00. I have owned this mower since 2005 and after 18 years in constant use, the brushes finally wore out in 2023. There is not much to maintaining this mower. It is a reliable workhorse. You just need to keep it clean. Every once in a while, open up the top (black) cover and vacuum out the motor compartment. Lots of grass clippings manage to get in there.

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