Question about Black & Decker Black and Decker Mm575 18" Mulching Lawn Hog Electric Lawn Mower
Purchased new switch for B&D MM575 mower. Installed it and now shorts out house electrical system. Does anyone have any idea how it should be wired?
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Posted on Jan 02, 2017
I had a MM875 go out after some months' service -- it actually went out with a bit of a bang. The problem was a shorted circuit; the weather was hot and the "solid state switch" on top of the motor shorted out. This part wasn't a switch but a bridge rectifier. The original part was specified a bit close to its actual working limits so I bought another (from Radio Shack, no less) that was higher rating -- something like 30 amps at 200 or 400 volts. ITs worked for years.
If it is a bridge then it will have two terminals labelled '~' and one each with the '+' and '-'. The plus and minus go to the motor (keep those connections the same as the original) and the others go to the supply wires.
Posted on Jul 15, 2008
I have the same mower and same problem. (I have already spent over $75 replacing the burned switch annually. ) The black wires carry the power. The orange wire is the common. The red and white wires are used to stop the motor quickly when the switch is released. To bypass the switch, connect the two black wires together with a wire nut. Disconnect and tape off the red and white wires. Now the mower will run whenever it is plugged in. It will take a few seconds longer for the blades to stop turning when unplugged. See this thread for a detailed discussion of the switch wiring. There is a picture of it near the bottom:
If plugging and unplugging gets too annoying, I may look for a plug-in switch I can plug between the extension cord and the mower plug. Until then, happy mowing!
Posted on Jul 19, 2008
SOURCE: Wiring problem
I'm sure you can find parts many places online. I got mine from www.ToolPartsDirect.com. If you type in the model number, you can see a complete parts diagram. The switch is part 9 on the diagram; about 15 bucks. When I was mowing, I smelled a burning electric parts type of smell. The motor brushes wore down from use. Now my wife can't tell me I don't mow enough!
Posted on Jul 24, 2008
I am holding the switch part (INDAK 681064) with the black pushbutton switch to the right.
The two wires on the top are Red then White. The two wires on the bottom are both black.
Posted on Jun 22, 2009
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