Question about Black & Decker 19" Electric Lawnhog Mulching Mower with Rear Bag

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I need wiring diagram for mm875 - Black & Decker 19" Electric Lawnhog Mulching Mower with Rear Bag

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  • tzotchev Sep 30, 2009

    its the switch bad or rectifier is bad?

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Posted on Jan 02, 2017

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SOURCE: switch diagram needed

Funny, I came here because I just opened up the switch case on my MM875. Hold the switch so the terminals are on top. Call the black switch (the part you push in to power up the mower) north. The north post gets white (metal connector). The west post gets red (plastic connector). The east post gets the black that comes from the mower's motor (plastic connector). The south post gets the black that comes from the outlet (metal connector)
(Black Plastic Switch)
White (Metal)
Red (Plastic) Black (Plastic--from motor))
Black (Metal--from outlet)

Posted on May 22, 2009

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2 Answers

Shaft turns while trying to remove blade on B&D MM875 elec. mower


Here's the scoop on the MM875: it has a plastic piece called a "blade insulator" (part # 241381-01) that "locks" the shaft to the blade, so that you can remove the nut by stopping or blocking the blade. If it has been damaged or stripped out, then stopping the blade won't do anything. However, the metal spacer directly under the nut IS still locked to the shaft (because of its shape), so you can use a pipe wrench or something to hold that in place and unscrew the nut. You might even be able to get someone in a home improvement store to do this for you. But you will still need to replace the insulator, which is only a few dollars.

Jul 22, 2010 | Black & Decker 19" Electric Lawnhog...

1 Answer

Switch diagram needed


Funny, I came here because I just opened up the switch case on my MM875. Hold the switch so the terminals are on top. Call the black switch (the part you push in to power up the mower) north. The north post gets white (metal connector). The west post gets red (plastic connector). The east post gets the black that comes from the mower's motor (plastic connector). The south post gets the black that comes from the outlet (metal connector)
(Black Plastic Switch)
White (Metal)
Red (Plastic) Black (Plastic--from motor))
Black (Metal--from outlet)

May 22, 2009 | Black & Decker 19" Electric Lawnhog...

1 Answer

Black & Decker MM875 blade































You can pick up a blade at almost any hardware store.








Sep 26, 2008 | Black & Decker 19" Electric Lawnhog...

1 Answer

Reply


rear frame,bag parts # 242500-02
rear grass bag only parts # 242501-05
parts diagram available at www.toolpartsdirect.com

Jun 20, 2008 | Black & Decker 19" Electric Lawnhog...

2 Answers

Mower tripped outlet breaker - wiring schematic available?


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.

Jun 16, 2008 | Black & Decker 19" Electric Lawnhog...

2 Answers

I have a black & decker lawnhog mm875 lawn mower that just stopped working. the power to the mower is good. can you help


I had the same problem. Its the switch.

When you pull the plastic handle up, it pushes down a button switch located in the handle. Over time (and with use) the parts begin to wear and the handle is no longer aligned properly with the button. So, ........ when you pull the handke up the button is not pushed in far enough to start the mower.

I want to bypass the handle and hard wire the mower but I can't find a wiring diagram.

May 04, 2008 | Black & Decker 19" Electric Lawnhog...

2 Answers

MM875 electric lawnmower


check motor if armature are not broken & see if the rectifier not burnt. rectifier works from ac & convert it to dc to run the motor.
if you need diagram for parts see toolpartsdirect.com

Aug 27, 2007 | Black & Decker 19" Electric Lawnhog...

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