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 Black and Decker MM875 Type 1 19" Electric LAWNHOG&trade Mulching Mower with Rear-Bag Parts

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 Fig # Img Part Name Availability Price
1
Upper Handle
Upper Handle
Part #: 243620-00
In stock
1 available
 $34.70
Add To Cart
2
Switch Housing Cover (Includes Both Sides)
Switch Housing Cover (Includes Both Sides)
Part #: 242756-02SV
In stock
25+ available
 $19.19
Add To Cart
3
Switch Housing Cover (Includes Both Sides)
Switch Housing Cover (Includes Both Sides)
Part #: 242756-02SV
In stock
25+ available
 $19.19
Add To Cart
4
Screw,M4X19
Screw,M4X19
Part #: 330019-13
In stock
25+ available
 $1.99
Add To Cart
5
Screw
Screw
Part #: 099292-18
In stock
15 available
 $3.99
Add To Cart
6
Nut
Nut
Part #: 038738-00
In stock
23 available
 $3.99
Add To Cart
7
Switch Lever
Switch Lever
Part #: 90508746
In stock
25+ available
 $3.99
Add To Cart
8
Spring
Spring
Part #: 681269-00
In stock
25+ available
 $3.99
Add To Cart
9
Switch,P.Button
Switch,P.Button
Part #: 681064-01
In stock
25+ available
 $18.26
Add To Cart
10
Screw,M4X19
Screw,M4X19
Part #: 330019-13
In stock
25+ available
 $1.99
Add To Cart
11
Handle,Middle
Handle,Middle
Part #: 242593-01
In stock
3 available
 $15.95
Add To Cart
12
Lower Shroud
Lower Shroud
Part #: 242494-03
Ships in 9 - 14 business days
 $34.70
Add To Cart
13
Motor
Motor
Part #: 242480-02
In stock
10 available
 $203.66
Add To Cart
14
Wrap,Tie
Wrap,Tie
Part #: 239715-06
In stock
3 available
 $2.99
Add To Cart
15
Rod,Connecting
Rod,Connecting
Part #: 242357-01
Ships in 9 - 14 business days
 $9.37
Add To Cart
Fig #ImgPart NameAvailabilityPrice
16
Ring,Push
Ring,Push
Part #: 241658-03
In stock
25+ available
 $2.99
Add To Cart
17
Upper Shroud
Part #: 90512673
Ships in 9 - 14 business days
 $31.87
Add To Cart
18
Door
Door
Part #: 90511856
In stock
1 available
 $12.35
Add To Cart
19
Spring,Torsion
Part #: 242380-00
Ships in 9 - 14 business days
 $4.86
Add To Cart
20
Rod
Part #: 242064-01
Ships in 9 - 14 business days
 $3.91
Add To Cart
21
Screw
Screw
Part #: 72954-00
Ships in 9 - 14 business days
 $1.19
Add To Cart
22
Flap
Flap
Part #: 241524-02
In stock
25+ available
 $19.71
Add To Cart
24
Deck Obsolete - Not Available
Part #: 242484-10
Discontinued
N/A
25
Plate,Bottom
Plate,Bottom
Part #: 242379-00
In stock
2 available
 $5.78
Add To Cart
26
Blade,Mulch
Blade,Mulch
Part #: 242381-00
In stock
25+ available
 $18.85
Add To Cart
27
Mulch Plate
Mulch Plate
Part #: 242382-06
In stock
11 available
 $23.76
Add To Cart
28
Spacer,Blade
Spacer,Blade
Part #: 680812-00
In stock
25+ available
 $4.86
Add To Cart
29
Blade Insulator
Blade Insulator
Part #: 241381-01
In stock
25+ available
 $3.99
Add To Cart
30
Fan
Fan
Part #: 241125-00
In stock
25+ available
 $14.77
Add To Cart
31
Hex Nut
Hex Nut
Part #: 90561895
In stock
25+ available
 $2.99
Add To Cart
Fig #ImgPart NameAvailabilityPrice
32
Spacer
Spacer
Part #: 092715-00
In stock
25+ available
 $3.99
Add To Cart
33
Spacer
Spacer
Part #: 241594-02
In stock
25+ available
 $1.18
Add To Cart
34
Screw
Screw
Part #: 243679-00
In stock
10 available
 $3.99
Add To Cart
35
Clamp
Clamp
Part #: 062443-02
In stock
2 available
 $1.06
Add To Cart
36
7Inch Wheel
7Inch Wheel
Part #: 242600-01
In stock
25+ available
 $9.44
Add To Cart
37
8Inch Wheel
8Inch Wheel
Part #: 242617-00
In stock
25+ available
 $10.12
Add To Cart
38
Ring,Push
Ring,Push
Part #: 624374-00
In stock
25+ available
 $2.99
Add To Cart
39
Cap,Hub
Cap,Hub
Part #: 239540-04
In stock
18 available
 $2.99
Add To Cart
40
Washer
Washer
Part #: 242488-00
In stock
25+ available
 $2.99
Add To Cart
41
Front Axle
Front Axle
Part #: 242364-03
In stock
1 available
 $21.23
Add To Cart
42
Rear Axle
Rear Axle
Part #: 242365-05
Ships in 9 - 14 business days
 $27.03
Add To Cart
43
Strap
Strap
Part #: 242363-00
In stock
8 available
 $1.99
Add To Cart
45
Lock,Lever
Lock,Lever
Part #: 242362-01
Ships in 9 - 14 business days
 $9.37
Add To Cart
46
Handle
Handle
Part #: 242350-02
Ships in 9 - 14 business days
 $6.63
Add To Cart
47
Wire,Lead
Wire,Lead
Part #: 242869-00
In stock
25+ available
 $3.99
Add To Cart
Fig #ImgPart NameAvailabilityPrice
48
Spring
Spring
Part #: 241656-00
In stock
2 available
 $1.19
Add To Cart
49
Indicator
Indicator
Part #: 242353-02
In stock
2 available
 $3.99
Add To Cart
50
Grass Bag
Grass Bag
Part #: 242501-05
In stock
25+ available
 $26.58
Add To Cart
51
Frame Only, Bag Not Included
Frame Only, Bag Not Included
Part #: 242500-02
In stock
25+ available
 $30.78
Add To Cart
53
Cable and Plug
Cable and Plug
Part #: 243518-02SV
In stock
21 available
 $18.89
Add To Cart
54
Cap,End
Cap,End Obsolete - Limited Quantity
Part #: 242735-00
In stock
4 available
 $12.03
Add To Cart
55
Magnet Ring
Magnet Ring
Part #: 243281-02
In stock
4 available
 $73.78
Add To Cart
56
Insulator
Insulator
Part #: 242254-01
Ships in 9 - 14 business days
 $2.93
Add To Cart
57
Stamping,Lower
Stamping,Lower
Part #: 241590-07
In stock
7 available
 $15.95
Add To Cart
58
Bearing,Ball
Bearing,Ball
Part #: 070055-00
In stock
18 available
 $12.03
Add To Cart
59
Heatsink
Heatsink
Part #: 242271-00
In stock
2 available
 $2.72
Add To Cart
60
Cap,Brush
Cap,Brush
Part #: 242253-01
In stock
8 available
 $2.99
Add To Cart
63
Hex Nut
Hex Nut Obsolete - Not Available
Part #: 243842-00
Discontinued
N/A
64
Washer
Washer
Part #: 099361-10
In stock
6 available
 $1.20
Add To Cart
65
Screw
Screw
Part #: 242243-00
In stock
4 available
 $1.19
Add To Cart
Fig #ImgPart NameAvailabilityPrice
66
Rectifier
Rectifier
Part #: 72256-03
In stock
25+ available
 $15.95
Add To Cart
67
Spring,Brush
Spring,Brush
Part #: 242207-00
In stock
25+ available
 $2.99
Add To Cart
68
Terminal
Terminal
Part #: 070162-00
In stock
8 available
 $2.99
Add To Cart
69
Insert,Brush
Insert,Brush
Part #: 242274-00
In stock
25+ available
 $2.99
Add To Cart
70
Handle Grip
Handle Grip
Part #: 90566348
In stock
25+ available
 $2.99
Add To Cart
71
Armature
Armature
Part #: 242028-08
In stock
4 available
 $156.94
Add To Cart
72
Screw,Curv.Head
Screw,Curv.Head
Part #: 241947-01
In stock
25+ available
 $2.99
Add To Cart
78
Knob
Knob
Part #: 90542737
In stock
25+ available
 $1.33
Add To Cart
80
Label,Door
Part #: 264294-00
Ships in 9 - 14 business days
 $1.20
Add To Cart
81
Bolt
Bolt
Part #: 90548863
In stock
11 available
 $2.99
Add To Cart
82
Washer,Flat
Washer,Flat
Part #: 242359-00
In stock
2 available
 $1.19
Add To Cart
83
Nut,Lock
Nut,Lock
Part #: 121640-00
In stock
5 available
 $1.19
Add To Cart
84
Support
Support
Part #: 242351-02
In stock
2 available
 $6.63
Add To Cart
85
Spring,Exten.
Part #: 242403-00
Ships in 9 - 14 business days
 $8.54
Add To Cart
86
Handle,Lower
Handle,Lower
Part #: 90564274
In stock
25+ available
 $7.98
Add To Cart
Fig #ImgPart NameAvailabilityPrice
197
Label,Swtch.Hsg
Label,Swtch.Hsg
Part #: 264533-00
In stock
3 available
 $3.99
Add To Cart
199
Series Label
Series Label
Part #: 243776-99
Ships in 9 - 14 business days
 $1.70
Add To Cart
200
Ident. Label
Part #: 243623-00
Ships in 9 - 14 business days
 $2.72
Add To Cart
201
Label,Caution
Part #: 264202-00
Ships in 9 - 14 business days
 $4.12
Add To Cart
202
Hgt.Adj.Label
Part #: 264200-02
Ships in 9 - 14 business days
 $3.29
Add To Cart
203
Nameplate
Part #: 598998-00
Ships in 9 - 14 business days
 $3.37
Add To Cart
206
Front Label
Front Label
Part #: 243616-00
Ships in 9 - 14 business days
 $1.70
Add To Cart
856
Discharge Chute
Discharge Chute
Part #: 242867-00
In stock
14 available
 $29.55
Add To Cart
77
Brush, Shunted
Brush, Shunted
Part #: 242273-00
In stock
25+ available
 $3.99
Add To Cart

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Lawn Mower Parts

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This article describes the differences between power switch and carbon brush failure symptoms.

Power Switch Repair 101
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Diagnosing Electric Power Tools 101

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Discussion
Discussion for the Black And Decker MM875 Type 1 19" Electric LAWNHOG&trade Mulching Mower With Rear-Bag

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  • Subject:
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1411996
Question: Trouleshooting

1411996

The motor keep slowing down and dies. When I wiggle the extension cord where it plugs into the mower, it speeds up a bit but then slows down anyway. Its almost like the contact between the extension cord and mower is poor. The extension cord works absolutely fine on my leaf blower and hand vaccuum.
Tinkerdave
Reply: Trouleshooting

Tinkerdave

Hi,
What your going to have to do is take the switch cover apart and see if you have any worn or broken connections.If you can't see anything then I would replace both the switch and cord assembly as a set.Hope that helps.Good luck.
Tinker
dsfabian
Question: Fan For Blk&Dkr Mulch. Mwr 8...

dsfabian

I purchased the FAN Part #24125-00/ 13726159 A433 tried to install the fan however as indicated in the manual, the reverse side --the side that the blade goes on top of, is too thick so that once the spacer and the lug nut are attached on top of the blade you can not tighten the lug nut so the blade does not stay on during operation.
Have ordered the handle,lower right side. would like to know how it can be removed and replaced. What do i have to remove, and how do i remove it so that i can put it back together. Do directions come with the part ?
bks
Question: Does Not Cut Grass

bks

First of all, how do i know mine is type 1 or type 2?
This morning mower did not cut grass. Everthing seemed working fine. Motor was running. Blade was running. adjusted height up/down. nothing worked. Checked blade, looked worn out. So i changed blade. Still the same problem. Blade is running in its normal speed, but does not cut grass at all. What went wrong? It was bought in 2005 (Type 2005....) . Thanks!
mathew
Question: Lawn Mover Switch Wiring

mathew

show the wiring
wenrobins
Reply: Lawn Mover Switch Wiring

wenrobins

I took off the 4 wires to replace the switch and sketched which wire went to which terminal. Will this help you? Mower MM600
switchman
Reply: Lawn Mover Switch Wiring

switchman

I removed the wires and did not mark where they went can you help?
switchman
Reply: Lawn Mover Switch Wiring

switchman

yes
switchman
Reply: Lawn Mover Switch Wiring

switchman

It would be nice to see this on the wiring.
thank you.

Switchman
KeithK
Question: Weak Motor, Any Help?

KeithK

The mower was working fine but then started to seem weak.
When the handle was depressed it would not get up to operating speed as quickly as normal, but after a few seconds it would speed up and be fine. This went on for one mowing session and then on the next session it did the same thing but then moved onto when you actually took the mower to the grass, as soon as it hit any resistance it would slow down to the point of being useless and soon it would not get up to speed at all. The motor doesn't sound very healthly when it is like this either.
Depressing the handle does get it to sort of go, so its not dead, its just useless in its current state.
Any advice on what may be wrong/how to fix it?
Some odd notes, when level it would continue with this 'weak' behavior but if you tilted it back it would speed up and sound like its old self, only to slow right down to uselessness the moment you put it on any grass.
WJA
Reply: Weak Motor, Any Help?

WJA

Hello KeithK,

It definitely sounds like you are having motor issues. Looking at the parts diagram. You can get to the motor by removing the upper shroud, then you can inspect the motor. If you smell any burnt insulation, the motor has most likely given up the ghost. You can also look at the brushes to see if they are worn. Look to see if the windings are burnt on the armature and field. Depending on how much you want to spend it looks like all the parts for the motor are available.

Good luck.
-WJA
My B&D MM875 electric mower won't run. The blade is not bend or binding. I removed the cover to expose the motor, and I can see the motor spark when I pull the starter handle. The mower makes a brief noise like it wants to run and then nothing. I removed the top of the motor housing and the brushes do look a bit worn. All connections seem to be in order.

!Bad brushes perhaps? Other thoughts? The motor looks okay and its not very old and hasn't been used all that much.
WJA
Reply: Electric Black & Decker Mowe...

WJA

Hello steelh,

If the brushes look good and the motor and connections all seem to be okay, use a multimeter and check the switch. You might have a short or an open in it. Here is a link to the part number for the switch, B&D MM875 switch.

Hope that helps,
WJA
judith
Question: Lawnhog Motor

judith

My electric starter switch caught on fire and burnt out and also the electric cord. I just want to replace the whole electric starter switch assembly. What do I buy to do this? Otherwise, the rest of the lawnmower is fine.
The old Switch P. Bottom started to smoke. I took it out, bought a new one, but obviously I don't know how to connect each cable right. Does anybody knows the right place for each cable?
Akin
Reply: Switch P Botton Replacement

Akin

I have the same problem, I didn't note the wire connections taking the old switch out. Can someone help?
David C.
Question: Replacing Brush

David C.

How would I go about replace the Shunted Brushes?

Part # 242273-00??

Thanks!
NeedHelp
Question: MM875 Vibrating

NeedHelp

Bought a brand new blade and replaced it. Seems to cut ok, but now the mower vibrates. Will this damage the motor? Is it possible the blade is off balance. It didn't vibrate like this before the blade replacement. Replaced blade per instructions.Mower model mm875
Mark
Reply: MM875 Vibrating

Mark

Hello,

I would suspect that the blade is mounted off of center. Make sure that the blade is mounted correctly on the blade spacer. Also verify that all of pieces involved in mounting the blade are present and are in the correct order, items #28 - 31 on the parts diagrams.

I hope this helps!

-Mark
steve
Reply: MM875 Vibrating

steve

I have the same model. You may need to replace the Fan, part number 241125-00, if the fins are broken off.
GUS ALANIZ
Question: UNEXPECTED SHUT OFF

GUS ALANIZ

I have an mm 875 19in and have been mowing aprx 1 and a half hours at a time....And worked fine for the most part then suddenly slowed as though a bad connection yet wasn't such then just shut off....If proceeded to take cover off and notice plenty of dust/grass clippings etc....Blew out as much as I could with a blower....And still nothing? Can you please help me?
Mark
Reply: UNEXPECTED SHUT OFF

Mark

Hi Gus,

The buildup of dust and clippings could have caused the motor to overheat. Look for signs of heat damage to the motor. Inspect the motor brushes for signs of burning or other damage. The slowing of the motor would indicate that the motor armature was damaged.

Good luck!

-Mark
Chris
Question: MM875

Chris

My Black and Decker MM875 mower quit suddenly and will not run. Is this most likely the switch in the handle? I took handle control box apart and carefully just pushed switch button in and out with the plug in with no result. How likely is the P Button switch being replaced would solve the problem?
Mark B
Reply: MM875

Mark B

We had the same symptoms - just wouldn't start. Check the brushes and commutator. I found a loose contact on the commutator.
wileyk
Reply: MM875

wileyk

I had the same problem. I finally removed the brush cap (part 60) and found that the red wire/brush braid connection was broken. A simple soldering job fixed the problem.
lee
Question: Burn

lee

If the mower burnt out, what part could damage most and how can I find it out,and replace it?
Charles G
Reply: Burn

Charles G

It might not have burnt out. Try replacing the brushes as they wear down and if they are touching the armature, it wont run. 5 bucks investment
dan
Question: Loose Blade

dan

I replaced the fan and now the blade is loose.
Charles  G
Reply: Loose Blade

Charles G

You might need to put a spacer on the shaft and then re tighten the nut
I just replaced the shunted brushes on my lawn mower and it ate one up. What did I do wrong?
Ellen
Question: Deck Replacement?

Ellen

Hi. I hit a low stump while mowing through tall grass. It bumped the blade up which then sliced a good 10" deep into the deck and stuck there. I believe it is the deck anyway. It's whatever thick plastic part is between the blade and the motor. Is the part I'm describing the deck? I mean, it's really stuck.
Ed
Reply: Deck Replacement?

Ed

I have the same problem with mine (high tree root), but with a deck cost of $115.00 (not a lot less than the cost of a new mower). I suspect I will just remove the damaged parts of the deck and patch the hole in the deck as best as I can.
Paul
Question: Blade Removal

Paul

I am trying to replace the fan and blade. I need to know how to loosen the bolt without the shaft turning. I cannot find a simple solution to this.
Dave
Reply: Blade Removal

Dave

Get a piece of wood about 2 x 4 x 18 inches long. Or maybe 1 x 2 inches. Wedge it in between the blade and part of the housing so that when you turn the bolt, the blade pushes against the wood until it will not turn.
slestak989
Reply: Blade Removal

slestak989

I have this problem, however, I do not think the wood will help. Ghe motor shaft spins even with blade braced.
Donna
Question: Loose Blade

Donna

I replaced the blade and fan and top nut with the right model numbers. When I put it all together using the diagram, it doesn't tighten. Is there a washer somewhere not listed in the diagram?
Fritz P Collett
Question: Wiring Harness

Fritz P Collett

I have ordered a replacement switch, however I have removed the switch and didn't make note of the correct plug alignment. Is there a wiring harness diagram available that is color coded?
Steve
Question: New Fan

Steve

After replacing the fan, and a new blade insulator the fan hits the screws (item # 34) below the fan. What causes this issue?
Mark
Reply: New Fan

Mark

Hi Steve,

Double check that all of the items #28-31 are present and mounted in the correct order. If any are missing or are mounted in the wrong order it could cause the blade to contact the screws.

I hope this helps!

-Mark
Baldy
Reply: New Fan

Baldy

A common fault is that the ball bearing (item58) somehow gets pushed slightly out of its recess in the bottom motor plate (#32). Normally when the blade spacer (28) mounts with its hub against the inner race of the ball bearing, there is at least 1/4" clearance between the blade spacer and the motor end cap. If the ball bearing has been pushed in, then this clearance will be reduced and then the fan will hit the 3 motor mounting screws. The solution is to disasemble the motor and re-press the bearing fully into its recess. This can easily be done with a socket and hammer.
ken
Question: Problem With B&D MM875

ken

Hello,

I have a Black & Decker MM875 electric lawn mower. Physically the mower is in good shape, but needed repair. So I replaced the following:

19" Blade P/N# 242381-01
Fan P/N# 241381-01
Blade insulator P/N# 241381-01
Terminal P/N# 70162-00
Brush Spring P/N# 242207-00
Brush Insert P/N# 242274-00
Shunted brush P/N# 242273-00

Also before reassembling everything I took a fine scotchbrite pad and lightly cleaned off the terminal contacts on the armature.

The problem now is that after I reassembled everything the mower doesn't work properly. When I plug the mower in and try to run it the following happens:
1. the mower spins at a very low RPM
2. there are noticeable small sparks were the brushes contact the armature
3. the mower will run for a few seconds 15sec /- before the circuit breaker trips. Is it possible that either the rectifier P/N# 72256-03 or switch lever P/N# 9050874 have gone bad?

Thank you

KEN
herb
Reply: Problem With B&D MM875

herb

The switch in the handle may not be pushing in all the way and since it isn't making full contact it runs slow and shuts off. You may want to try shimming it up or replacing the whole lever switch assembly.
Reggie
Question: Replace Switch Leve

Reggie

The switch lever fell off. How do I replace the switch lever? What parts other than the spring are needed for it to work properly?
Keith
Reply: Replace Switch Leve

Keith

1. Install the spring into the notch in the lever with the short side in the lever.
2. Pulling the long tab of the spring in, place the lever on the pin in the switch housing.
3. You now need to place the bottom half of the switch housing on the upper handle, then add the top half of the housing and connect with a screw (part #5).
4. Install teh remaining screws (part #10).
5. Re-attach the upper handle.
miker5
Question: Rectifier

miker5

My mower won't run at all and is tripping the breaker. Is there any way to check the rectifier? Do they ever go bad? The armature does not have any burnt smell to it.
Sven
Question: Flap Replacement

Sven

Just got the flap I ordered for the MM875. It appears that removal of the wheel assembly would be the most direct way to access the flap. However, it feels like there is a nut on the inside so I don't want to turn too hard. Is an alternate approach to get the axle cap off? If so, what's the recommended procedure? Which is the better approach? Is there an even better one?
Keith
Question: Motor

Keith

While I am mowing it runs great, no smell, but when I disengage the power switch, it comes to an abrupt stop and shakes the mower like it has a brake on it. It is not smooth anymore. What would cause this to happen?
doug
Question: Screeching Motor

doug

My mower will run fine for couple of minutes then it starts making a really loud sound from the motor. I will release the lever and let the motor stop. When I engage it again it runs fine for couple minutes then noise comes back. Any idea what this could be?
Don
Question: Motor Won

Don

Motor stopped while mowing on bumpy surface. Opened up motor cavity, ordered then replaced brush assemblies as old were worn. Noticed one of the small rectangular uprights on the top of the shaft that the brushed aim at was bent down. I repositioned, is intact and does not seem loose.

Motor still wont go or even try. I have power to the brush assemblies, the shaft turns easily by hand - I'm perplexed! Help
rick
Question: Armature Replacement

rick

is the armature a pressed in style? Hammering on the nut on the blade end does not seem to push the armature out of the lower bearing.
Scott
Reply: Armature Replacement

Scott

If you want to remove the armature or lift it out of the lower ball bearing, you may need to remove the magnet ring first.
When the motor operates, there is light sparking between the armature and the shunted brush. (This emits a burnt metallic smell, probably similar to the one described by Cecilia.)

I don't suspect that this is normal. There appears to still be a lot of life to the shunted brush. How does one correct this or should I get a new shunted brush? I'd rather not replace the armature (my second) or the whole motor ($$$).
David C.
Reply: Sparking Between Armature Contac...

David C.

I seem to be having the same problem. If I tweak around with it it will run for a split second then cut off, make some humming sound, and begin to smoke from inside the armature? I imagine my first step might be spend the $6 on 2 new brushes, and see what happens?

Any advice on how to install them?
John Manley
Question: GFI Switch

John Manley

After a few years of sitting, I opened up the cowling and cleaned out leaves dirt, webs and dust. The mower ran for about 4 minutes, then stopped. No smoke and no burning, but trips GFI switch every time I try to turn it on. MM875 Type 1. I checked wiring and GFI circuit, which appears to work fine otherwise.
agoyal
Reply: GFI Switch

agoyal

Hi, I had the same problem. I bought the mower yesterday. Did you find out what the solution to the problem was? Please let me know,

Cecilia
Question: Mower Won

Cecilia

I was mowing my lawn and for a second smelled like something was burning/melting? I kept mowing for another half hour or more. All of a sudden the mower won't start. Can you tell me what could have happened and how/if I can fix it?
Mark
Reply: Mower Won

Mark

Hi Cecilia,

It depends on where the smoke was coming from but I would suspect motor problems. The armature and field inside of the motor have an epoxy insulation on them. When the motor overheats this insulation will melt and burn off. You will want to also inspect the switch before you order any parts. The motor assembly is part #242480-02 and the switch is part #681064-01. Both are available from http://ereplacementparts.com.

Good luck with your repair!

-Mark
Brad
Reply: Mower Won

Brad

The parts holding the blade on are plastic, when they overheat, they melt and it shuts the mower down. The parts are easy to replace, but avoid letting your mower overheat.
Just received my order for Switch. P. Button for Fig#9, but I have problem on how to install the switch. I took the old switch out when I was placing the replacement, now I forgot how it was installed. The switch won't fit into the place where I took it out. can you please let me know how to install the switch? or do you have a diagram or picture that show how the switch is installed? Thank you
tomouteast
Reply: Problem Install Swtich (fig #9) ...

tomouteast

There are some nice photos at the website listed below. The model of the mower shown is probably either a LM175, MM275, or MM575. The pics should still be a good reference for you.
link removed
Eugene Brumblay
Question: MM875: Type 1 Or 2

Eugene Brumblay

How does one ascertain the type of the mower in possession?

Thanks!
Mark
Reply: MM875: Type 1 Or 2

Mark

Hi Eugene,

The "Type" number will be listed on the model number label on the mower. If the type number is not listed on the tag you are usually safe to assume that you have a Type 1 machine. Often the manufacture will not list the Type on Type 1 units. The type number is used to reference service changes to the tool and since Type 1 machines are the first production the Type number is not relative.

I hope this helps with your repair!

-Mark
lEONARD
Question: BEARING

lEONARD

Is the bearing on top of the armature sold with the armature, or can you buy it separate?
Mark
Reply: BEARING

Mark

Hi Leonard, Unfortunately the manufacture only offers the upper bearing as part of the armature assembly. It is part #242028-08 and is available from http://www.ereplacementparts.com Thanks! -Mark
Paul
Reply: BEARING

Paul

You need to take the cap end off #54 and look at it.
It may be the bushing in the cap end that is bad.
Order a new cap end.
justin
Question:

justin

I bought a new fan washers and a nut, and when i put them on i can't get the blade to tighten.
Mark
Reply:

Mark

Hi justin,

Verify that part #241381-01 (Item #29 on the exploded view) is present and installed properly. It is the Blade Insulator and gives the assembly the proper thickness so nut can clamp the assembly together.

Hope this helps!

-Mark
Jack
Question: Blade

Jack

Does every 19" blade fit all B&D 19" lawn mowers?
Mark
Reply: Blade

Mark

The proper blade for both Type 1 and Type 2 MM875 lawn mowers is part #242381-00 and is available from http://www.ereplacementparts.com. Not all B
jijubell
Question: B& D Electric Lawnmower Mode...

jijubell

I need to know how to check switch and motor to see what part just click and no start. It did smoke when using it. Used it 5 times and it croaked..
In past it would quit and later it would start up again now nothing. Thank you. send me note to
link removed as I sorta need to know soon. Jim
Marienne Brown
Review: Black And Decker - MM875
5 star
Marienne Brown
This is a very good lawn mower. I am mostly pleased with the way it picks up wet oak leaves. I am also very pleased to know that when I hit rocks with it and the fan breaks I am able to replace it very quickly from this very wonderful company. It is also very easy to replace this part and also to keep the blade sharp.
fancyboxy