Video & Articles: Appliance & Equipment RepairBriggs & Stratton Lawn Mower Engine Carburetor O-Ring #270344S

Briggs & Stratton Lawn Mower Engine Carburetor O-Ring #270344S

04:37
This video provides step-by-step instructions for replacing the carburetor o-ring on Briggs and Stratton small engines, commonly found in Toro, Lawn Boy, John Deere, Craftsman, and Murray lawn mowers, riding tractors, zero-turn radius mowers, wheeled edgers, pressure washers, and generators. The most common reasons to replace the carburetor o-ring are when the carburetor is replaced, during other repairs, or if it breaks or becomes damaged, causing the engine to run roughly.

All of the information in this o-ring replacement video is applicable to the following brands: Briggs & Stratton, Toro, John Deere, Lawn Boy, Craftsman, Murray

Tools used: Phillips head screwdriver, 5/16” socket or nut driver, pliers, 3/8” socket or nut driver

Step By Step Instructions

1
Before you replace the o-ring behind your engine’s carburetor first make sure the engine has cooled.
2
Next, you should remove the wire and boot from the spark plug to prevent the engine from accidentally starting.
3
Use a phillips-head screwdriver to unthread the mounting screws securing the engine cover.
4
Release the starter rope from the retainer and pull the cover off.
5
Use a 5/16th inch socket or nut driver to unthread the screw securing the air filter cover.
6
Remove the cover and the filter then use a phillips-head screwdriver to remove the screw securing the carburetor cover.
7
Pull the cover off and remove the three screws securing the air filter housing.
8
Detach the breather tube to release the housing.
9
Now use pliers to detach the air vane spring.
10
Use a quarter-inch socket or nut driver to unthread the shoulder bolt securing the vane to the carburetor.
11
Use a 3/8th inch socket or nut driver to remove the carburetor mounting bolts.
12
Pull the carburetor forward and remove the old o-ring if still intact.
13
Install the new o-ring by sliding onto the intake port.
14
Reposition the carburetor and secure it with the mounting bolts.
15
Replace the shoulder bolt to secure the air vane.
16
Reattach the air vane spring.
17
Reattach the breather tube to the breather post and align the air filter housing.
18
Rethread the screws and torque them to three-and-a-half foot pounds.
19
Realign the carburetor cover and rethread the screw.
20
With the filter in place, reposition the filter cover and rethread the screw to secure.
21
Realign the engine cover.
22
Rethread and tighten the mounting screws.
23
Depress the bail arm, extend the starter rope and secure it in the retainer.
24
With the repair completed reattach the wire and boot to the spark plug refill the fuel tank and your engine should be ready for use.
Description
This video provides step-by-step instructions for replacing the carburetor o-ring on Briggs and Stratton small engines, commonly found in Toro, Lawn Boy, John Deere, Craftsman, and Murray lawn mowers, riding tractors, zero-turn radius mowers, wheeled edgers, pressure washers, and generators. The most common reasons to replace the carburetor o-ring are when the carburetor is replaced, during other repairs, or if it breaks or becomes damaged, causing the engine to run roughly.

All of the information in this o-ring replacement video is applicable to the following brands: Briggs & Stratton, Toro, John Deere, Lawn Boy, Craftsman, Murray

Tools used: Phillips head screwdriver, 5/16” socket or nut driver, pliers, 3/8” socket or nut driver
Step-By-Step Instructions
1
Before you replace the o-ring behind your engine’s carburetor first make sure the engine has cooled.
2
Next, you should remove the wire and boot from the spark plug to prevent the engine from accidentally starting.
3
Use a phillips-head screwdriver to unthread the mounting screws securing the engine cover.
4
Release the starter rope from the retainer and pull the cover off.
5
Use a 5/16th inch socket or nut driver to unthread the screw securing the air filter cover.
6
Remove the cover and the filter then use a phillips-head screwdriver to remove the screw securing the carburetor cover.
7
Pull the cover off and remove the three screws securing the air filter housing.
8
Detach the breather tube to release the housing.
9
Now use pliers to detach the air vane spring.
10
Use a quarter-inch socket or nut driver to unthread the shoulder bolt securing the vane to the carburetor.
11
Use a 3/8th inch socket or nut driver to remove the carburetor mounting bolts.
12
Pull the carburetor forward and remove the old o-ring if still intact.
13
Install the new o-ring by sliding onto the intake port.
14
Reposition the carburetor and secure it with the mounting bolts.
15
Replace the shoulder bolt to secure the air vane.
16
Reattach the air vane spring.
17
Reattach the breather tube to the breather post and align the air filter housing.
18
Rethread the screws and torque them to three-and-a-half foot pounds.
19
Realign the carburetor cover and rethread the screw.
20
With the filter in place, reposition the filter cover and rethread the screw to secure.
21
Realign the engine cover.
22
Rethread and tighten the mounting screws.
23
Depress the bail arm, extend the starter rope and secure it in the retainer.
24
With the repair completed reattach the wire and boot to the spark plug refill the fuel tank and your engine should be ready for use.

Applicable Product Model

Parts Needed
O-Ring
O-Ring
$14.06
Total$0.00

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