Part Location Diagram of 90615074 DeWALT MOTOR HEAD ASSEMBLY
See part 14 in the diagram
( Grid squares measure 1x1 inch )

MOTOR HEAD ASSEMBLY 90615074

Manufactured by:
DeWALT
ERP Number:
ERP18989239
Part Number:
90615074
Original Equipment Manufacturer ?
In Stock
Delivers in 3-5 Business Days!

Easy 

15 - 30 mins 

(41 rated repairs) ?

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Product Description

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This item has been sourced from the original manufacturer to be used with electric trimmers from Black and Decker. The durable plastic housing fits onto the bottom of the main tube and is used to cover the motor and to mount the spindle and guard. The motor housing is sold as an individual replacement part.

Troubleshooting

This part works with the following brands:
  • Black and Decker
  • Craftsman
This part works with the following products:
  • Trimmer
Part# 90615074 replaces these:
90615074, P90615074,

Customer Part Reviews

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4.8
Average Rating (out of 5):
★★★★★
★★★★★
(12 Reviews)
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Customer Repair Instructions

All our customer repair instructions are solicited directly from other customers just like you who have purchased and replaced this exact part.

Easy 

15 - 30 mins 

(41 rated repairs) ?
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Would no longer spin and spindle was very loose in housing.

Tim from Fresno, California

29 of 29 people found this instruction helpful.
Difficulty Level:
Easy
Total Repair Time:
15 - 30 mins
Tools:
Screw drivers
Parts Used:
N498091, 90615074
Not sure that I needed both Motor Housing Assy and Gear and Spindle but I ordered both parts just in case. When I received the parts I compared mine to the new parts and found the gears were worn down so they were not touching the internal gear to make the spindle spin. I also found the plastic housing had melted somewhat where the spin dle rested which caused it to be loose. I used both replacement parts and was glad I did, it now works like new. This was an easy replacement just remove screws change out parts and replace with the same screws.
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Motor housing bearing socket melted due to friction from stuck material

Vincent from Southington, Connecticut

17 of 17 people found this instruction helpful.
Difficulty Level:
Easy
Total Repair Time:
Less than 15 mins
Parts Used:
90615074
I removed screw holding cutting shield and removed shield. Removed screws holding two halves of housing together. Removed one half of the housing to see how the motor and drive gear fit into the housing. Remove clamp holding power/control wire in place. Pay attention to the spring for the button that allows the rotation of the head on the shaft located where attaches to the housing before removing the second half of the housing. Reverse these steps to assemble
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Motor housing and spindle wore out because of grass built up around shaft

ann from moncks corner, South Carolina

14 of 14 people found this instruction helpful.
Difficulty Level:
Easy
Total Repair Time:
15 - 30 mins
Tools:
Screw drivers
Parts Used:
N498091, 90615074
1 Removed edger guide and safety shield
2 Removed screws in motor housing to split case
3 Removed motor and spindle assembly from old housing
4 Put motor and new spindle into new housing
5.Reassembled housing, safety shield, and edger guide

Note,,,,, be careful to route wires to avoid pinching them whe n assembling two halves of housing.
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Long stringy weeds got pulled in and spun around the gear assembly. The housing melted. This is second time this happened.

jennifer from Amissville, Virginia

11 of 11 people found this instruction helpful.
Difficulty Level:
A Bit Difficult
Total Repair Time:
30 - 60 mins
Tools:
Pliers, Screw drivers
Parts Used:
N498091, 90615074
Unscrewed all screws and opened housing. Unscrewed the screws holding the motor in place. Replaced the gear. Screwed the wires to the motor. Had to do this twice because the wires were not tucked in properly the first time. Make sure the handle is going the right way too. My only complaint is new screws were not supplied. Some of the old ones had stripped due to being stuck tight with crud. The price to replace these two parts is a no brainer compared to buying a new trimmer.
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Trimmer head would not engage with motor drive gear

Harold from ROCKVILLE, Maryland

7 of 7 people found this instruction helpful.
Difficulty Level:
Easy
Total Repair Time:
15 - 30 mins
Tools:
Pliers, Screw drivers
Parts Used:
N498091, 90615074
Replaced both the motor housing assembly and the Gear and spindle assembly.
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Spool wore out housing assembly then teeth on spool to much play

Danny from ofallon, Missouri

7 of 7 people found this instruction helpful.
Difficulty Level:
Easy
Total Repair Time:
Less than 15 mins
Tools:
Screw drivers
Parts Used:
N498091, 90615074
Remove the screws from the motor housing assembly and separate housing and remove guard. Remove worn gear and spindle. Install new spindle and gear. Assemble motor housing and guard in reverse order.
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Motor housing assembly plastic wore out because of some netting that got caught in between the plastic housing and the spinning head

Richard from Sheboygan, Wisconsin

4 of 4 people found this instruction helpful.
Difficulty Level:
A Bit Difficult
Total Repair Time:
30 - 60 mins
Tools:
Pliers, Screw drivers
Parts Used:
90615074
1. Removed the plastic shield with a screwdriver and pressed on the latch holding it in.
2. Removed the 8 other screws on the housing
3. Disconnected the internal power cord by unscrewing two screws
4. Put the motor and other parts inside the new plastic housing
5. Attached the power wire connection on to the new h ousing with the 2 screws
6. Put together the 2 sides of the housing
7. Using the 8 screws I screwed the 2 sides of the housing together
8. Attached the plastic shield, snapped it in place
9. Put in the last screw that holds the shield in place.
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Over a period of time grass and vines had wrapped around the spindle shaft causing downward pressure between the spindle assembly and the gear housing. This pressure generated heat melting the plasti

Rex from THOMASVILLE, Alabama

3 of 3 people found this instruction helpful.
Difficulty Level:
Easy
Total Repair Time:
Less than 15 mins
Tools:
Screw drivers
Parts Used:
N498091, 90615074
1. Removed the damaged housing and spindle/gear assembly.
2. Installed the new housing and spindle/gear assembly.
3. Verified the tightness of all screws.
4. Performed about 30 minutes of weed eating to verify everything works fine.
Note: These parts appear to be OEM and therefore perfect replacement parts. I\'ve now used my repaired weed eater/trimmer for several hours. I works like brand new. I have 6 power settings and only use it on the lowest setting (1). I have used it on setting 6 a couple of times but is just a waste of power and runs down the batter a lot quicker than setting 1. I can get about an hour out of the battery on setting 1 on normal grass, otherwise about 30 minutes if the grass/weeds and tough and super tough. Most importantly is making sure the long strands of grass and vines don\'t wrap around the spindle assembly - which is what eventually caused the failure of the original product. I was really amazed at the reasonable price of these parts given how expensive the electric weed trimmer is. I usually run the battery powered 40Volt weed trimmer for about 1 hour per week on average. I am pleased with the repairs using these parts and would do it again.
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Motor housing worn out and gear stripped

JOSEPH from STONEWALL, Mississippi

2 of 2 people found this instruction helpful.
Difficulty Level:
Easy
Total Repair Time:
15 - 30 mins
Tools:
Screw drivers
Parts Used:
N498091, 90615074
Removed old motor housing and stripped gear. Replaced with new housing and gear. Everything fit like OEM parts. No problems,very impressed .

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Bearing race built in to motor housing wore out (melted)

David from Bainbridge, New York

2 of 2 people found this instruction helpful.
Difficulty Level:
Easy
Total Repair Time:
15 - 30 mins
Tools:
Screw drivers
Parts Used:
90615074
Took apart ( 8 screws or so) removed motor and wiring stuck it back together....works like new.
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Model Cross Reference

This part works with the following models:
ERP Number: ERP18989239
Manufacturer Part Number: 90615074
Brand Model Number Description
Craftsman CMCST98020E1 Trimmer - 40v Max Li-Ion Strin
Black and Decker LST136 Trimmer - 36V String Trimmer