Easy
15-30 minutes
This brush holder assembly is an authentic OEM replacement part that is specially designed for use on Briggs and Stratton generators. Brushes help to conduct electric current in the motor that powers the unit. This assembly includes one plastic brush holder and two carbon brushes with a lead wires and springs attached. You would need a screwdriver to complete this job.
Assembly, Holder, Brush 66386GS
OEM part for: Briggs and Stratton, Snapper
Part Number: 66386GS
$25.41
In Stock
Ships within 1 business day 
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Compatibility
This Assembly, Holder, Brush will fit the following 406 machines. Confirm this part works with your model, and view the detailed model diagrams and repair help we have to offer.
Briggs and Stratton
Snapper
Show More Compatible ModelsThis item works with the following types of products:
- Generator Parts
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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.
No power
Don - February 5, 2017
👍 1 of 1 people found this instruction helpful
Tool Type
Generator
Difficulty
Easy
Time
Less than 15 minutes
Tools Used
Screwdriver, Pliers
Replaced the old parts with the new ones followed instructions that came with the parts . All went well generator now puts out electricity problem fixed. Advice take photo of wiring so everything go's back the same way. Reair was very easy.
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Generator did not put out 120 volts
Abellino - August 17, 2016
👍 1 of 1 people found this instruction helpful
Tool Type
Generator
Difficulty
Easy
Time
15-30 minutes
Tools Used
Screwdriver, Nutdriver
I took cover of generator off replaced the avr and the brushes and put everything back on started the generator up and checked it ready to go
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No output from generator
Scott - July 7, 2016
👍 1 of 1 people found this instruction helpful
Tool Type
Generator
Difficulty
Medium
Time
30-60 minutes
Tools Used
Screwdriver, Socket set, Small alligator clip jumper cables
1. Removed generator cap using 8mm socket set
2. Removed and replaced old AVR and brush assembly
3. Followed included instructions to remagnetize brush assembly by using small alligator 4. Clip jumper cables (not included) to connect positive and negative leads of brushes to a positive and negative posts of a 12 V battery (not included).
5. Started and ran the generator for a few seconds.
6. Removed jumper cables.
7. Reconnected lead wires.
8. Re-installed the cap.
9. Started generator and now works as good as new!
2. Removed and replaced old AVR and brush assembly
3. Followed included instructions to remagnetize brush assembly by using small alligator 4. Clip jumper cables (not included) to connect positive and negative leads of brushes to a positive and negative posts of a 12 V battery (not included).
5. Started and ran the generator for a few seconds.
6. Removed jumper cables.
7. Reconnected lead wires.
8. Re-installed the cap.
9. Started generator and now works as good as new!
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10kw Briggs & Stratton generator - start up and shut down, would not stay running
Anthony - January 7, 2016
👍 1 of 1 people found this instruction helpful
Tool Type
Generator
Difficulty
Hard
Time
More than 2 hours
Tools Used
Screwdriver, Socket set
Parts Used
Turned out the brushes were bad and not sending enough voltage through the system, the system detected low voltage and shut down. It would start, run for 30 seconds and shut down 3 times. No error codes on the panel, just wouldn't stay running.
Because the brushes are at the bottom of this model I actually had to take off the side panels, disconnect all wiring and fuel line and remove the engine. The cap needs to be removed from the alternator at the very bottom of the engine/generator assembly to get to the brushes. Once you have it out, its very easy to get them out and replace them. Unfortunately because of the design and that the generator side of the unit is sunk down into the bottom of the unit I don't believe there is a way to change the brushes with the engine still in the unit. Its also impossible to just remove the generator from the engine as you would need a puller to disconnect it and this can't be done with the engine in place.
The engine is very heavy and took 2 people to lift out from the mounts and move it. If your strong you can probably move it a short ways out of the unit and lay it down to work on it.
Because the brushes are at the bottom of this model I actually had to take off the side panels, disconnect all wiring and fuel line and remove the engine. The cap needs to be removed from the alternator at the very bottom of the engine/generator assembly to get to the brushes. Once you have it out, its very easy to get them out and replace them. Unfortunately because of the design and that the generator side of the unit is sunk down into the bottom of the unit I don't believe there is a way to change the brushes with the engine still in the unit. Its also impossible to just remove the generator from the engine as you would need a puller to disconnect it and this can't be done with the engine in place.
The engine is very heavy and took 2 people to lift out from the mounts and move it. If your strong you can probably move it a short ways out of the unit and lay it down to work on it.
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Love to no electricity from generator
bruce - June 3, 2020
Tool Type
Generator
Difficulty
Easy
Time
Less than 15 minutes
Tools Used
Nutdriver
Parts Used
Took off cover
Took off old brushes
Replaced with a new set
Replaced cover
Took off old brushes
Replaced with a new set
Replaced cover
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Generator would run but there was NO output voltage
Ben - February 25, 2019
Tool Type
Generator
Difficulty
Medium
Time
30-60 minutes
Tools Used
Screwdriver, Pliers, Socket set, Nutdriver
Tested AVR by jumping brushes to establish a field. This did not work. R/R AVR but still no output voltage. R/R brushes, idle control, and idle control PCB. Generator works properly.
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Generator only had 3 volts on output
Brad - March 1, 2018
Tool Type
Generator
Difficulty
Easy
Time
15-30 minutes
Tools Used
Pliers, Nutdriver
1. Removed front cover from rotor and stator. 7mm nut driver
2. Removed brush assembly and regulator.7mm nut driver
3. Used pliers to pull wire connectors off
4. Installed new parts.
5. Our front cover back on.
6. Started generator tested power.
2. Removed brush assembly and regulator.7mm nut driver
3. Used pliers to pull wire connectors off
4. Installed new parts.
5. Our front cover back on.
6. Started generator tested power.
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Generator put out no power when running
Gregory - December 2, 2017
Tool Type
Generator
Difficulty
Easy
Time
Less than 15 minutes
Tools Used
Screwdriver
1. Remove plastic cap/vent off the end of generator
2. Remove and replace brush assembly, being sure to connect wires correctly
3. Remove the old voltage regulator and booster (if equipped), replacing both items with the voltage regulator as described in the directions included with the new voltage regulator
4. Start generator and retest for proper function (electrical output)
2. Remove and replace brush assembly, being sure to connect wires correctly
3. Remove the old voltage regulator and booster (if equipped), replacing both items with the voltage regulator as described in the directions included with the new voltage regulator
4. Start generator and retest for proper function (electrical output)
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Not producing electricity
Rosemary - September 25, 2017
Tool Type
Generator
Difficulty
Easy
Time
15-30 minutes
Tools Used
Socket set
Disconnected spark plug for safety reasons,
Removed cover with socket set
Slid out regulator - AVR control out of slot holding it....
Removed screw holding in Assy Holder , brush...... disconnected wires by pulling them off....
Pulled out assy holder, brush and replaced with new one after plugging wires back on new one , then screwed it back in.
Removed wires from regulator - AVR control, and then plugged those wires on new AVR control
Then slid back into slot ....
Replaced cover, reconnected spark plug....
And now have electricity.!!!!!
Removed cover with socket set
Slid out regulator - AVR control out of slot holding it....
Removed screw holding in Assy Holder , brush...... disconnected wires by pulling them off....
Pulled out assy holder, brush and replaced with new one after plugging wires back on new one , then screwed it back in.
Removed wires from regulator - AVR control, and then plugged those wires on new AVR control
Then slid back into slot ....
Replaced cover, reconnected spark plug....
And now have electricity.!!!!!
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All our customer repair instructions are solicited directly from other customers just like you who have purchased and replaced this exact part. While we moderate these reviews for profanity, offensive language or personally identifiable information, these reviews are posted exactly as submitted and no alterations are made by our team.
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