Video & Articles: Appliance & Equipment RepairBriggs & Stratton Small Engine Replace Carburetor Float Part # 591120

Briggs & Stratton Small Engine Replace Carburetor Float Part # 591120

05:39
This video provides step-by-step repair instructions for replacing the carburetor float on a Briggs and Stratton small engine. The most common reason for replacing the float is when the engine won’t start, or if it stops quickly after starting.

All of the information for this carburetor float replacement video is applicable to the following brands:
Briggs & Stratton, MTD

Tools needed: 7mm socket, 5/16 inch socket or nut driver, locking pliers, pliers, 10mm allen wrench

Step By Step Instructions

1
Before you begin the process of replacing the float in the carburetor…
2
…first make sure the engine has cooled.
3
Next, you should remove the wire and boot from the spark plug to prevent the engine from accidentally starting.
4
We recommend performing this procedure with little or no fuel in the tank.
5
Now loosen the rope guide wing nut and remove the starter rope.
6
Use a 5/16th inch socket or nut driver to unthread the bolts securing the blower housing cover.
7
Lift off the cover.
8
Now release the air filter cover by pulling it off from the top…
9
…and remove the air filter.
10
Remove the screws securing the air filter housing.
11
You will need to use two different sized sockets or nut drivers to do this – 5/16th inch…
12
…and 7mm.
13
Pull the housing free of the breather tube to remove.
14
Use locking pliers to crimp the fuel line.
15
Lift the fuel tank off of the blower housing…
16
…and use pliers to release the spring clamp securing the fuel line.
17
Detach the line from the carburetor and set the tank aside.
18
Now detach the carburetor from both the choke and throttle linkages.
19
Be sure to remove the “o”-ring and retainer from the carburetor adapter if necessary.
20
Use a 10mm allen wrench to rotate and remove the drain plug to drain any fuel that may be in the carburetor.
21
Reinstall the plug.
22
Using the 7mm socket or nut driver to unthread the screws securing the bowl.
23
Lift off the bowl and use pliers to pull out the float pin.
24
Lift out the old float and needle.
25
We recommend using carburetor cleaner to clean out the inlet port.
26
Install the new carburetor float…
27
…by hooking on the needle…
28
…then position the new assembly on the carburetor and insert the provided pin to secure.
29
Properly realign the bowl…push it into place…
30
…and rethread the screws to secure.
31
If necessary, reinsert the “o”-ring in the carburetor and snap in the retainer.
32
Now connect both the throttle and choke linkages to the carburetor and align the carburetor on the adapter.
33
Attach the fuel line to the carburetor and secure it with the spring clamp.
34
Reposition the fuel tank on the blower housing and remove the locking pliers.
35
Reinstall the air filter housing by first attaching it to the breather tube…
36
…then rethread the screws to secure.
37
Reposition the air filter in the housing.
38
Replace the blower housing cover…
39
…then thread and tighten the bolts to secure.
40
Depress the bail arm…
41
…extend the starter rope…
42
…and hook the rope on the guide.
43
Tighten the rope guide wing nut.
44
With the repair completed…
45
…reattach the wire and boot to the spark plug…refill the fuel tank…
46
…and your engine should be ready for use.
Description
This video provides step-by-step repair instructions for replacing the carburetor float on a Briggs and Stratton small engine. The most common reason for replacing the float is when the engine won’t start, or if it stops quickly after starting.

All of the information for this carburetor float replacement video is applicable to the following brands:
Briggs & Stratton, MTD

Tools needed: 7mm socket, 5/16 inch socket or nut driver, locking pliers, pliers, 10mm allen wrench
Step-By-Step Instructions
1
Before you begin the process of replacing the float in the carburetor…
2
…first make sure the engine has cooled.
3
Next, you should remove the wire and boot from the spark plug to prevent the engine from accidentally starting.
4
We recommend performing this procedure with little or no fuel in the tank.
5
Now loosen the rope guide wing nut and remove the starter rope.
6
Use a 5/16th inch socket or nut driver to unthread the bolts securing the blower housing cover.
7
Lift off the cover.
8
Now release the air filter cover by pulling it off from the top…
9
…and remove the air filter.
10
Remove the screws securing the air filter housing.
11
You will need to use two different sized sockets or nut drivers to do this – 5/16th inch…
12
…and 7mm.
13
Pull the housing free of the breather tube to remove.
14
Use locking pliers to crimp the fuel line.
15
Lift the fuel tank off of the blower housing…
16
…and use pliers to release the spring clamp securing the fuel line.
17
Detach the line from the carburetor and set the tank aside.
18
Now detach the carburetor from both the choke and throttle linkages.
19
Be sure to remove the “o”-ring and retainer from the carburetor adapter if necessary.
20
Use a 10mm allen wrench to rotate and remove the drain plug to drain any fuel that may be in the carburetor.
21
Reinstall the plug.
22
Using the 7mm socket or nut driver to unthread the screws securing the bowl.
23
Lift off the bowl and use pliers to pull out the float pin.
24
Lift out the old float and needle.
25
We recommend using carburetor cleaner to clean out the inlet port.
26
Install the new carburetor float…
27
…by hooking on the needle…
28
…then position the new assembly on the carburetor and insert the provided pin to secure.
29
Properly realign the bowl…push it into place…
30
…and rethread the screws to secure.
31
If necessary, reinsert the “o”-ring in the carburetor and snap in the retainer.
32
Now connect both the throttle and choke linkages to the carburetor and align the carburetor on the adapter.
33
Attach the fuel line to the carburetor and secure it with the spring clamp.
34
Reposition the fuel tank on the blower housing and remove the locking pliers.
35
Reinstall the air filter housing by first attaching it to the breather tube…
36
…then rethread the screws to secure.
37
Reposition the air filter in the housing.
38
Replace the blower housing cover…
39
…then thread and tighten the bolts to secure.
40
Depress the bail arm…
41
…extend the starter rope…
42
…and hook the rope on the guide.
43
Tighten the rope guide wing nut.
44
With the repair completed…
45
…reattach the wire and boot to the spark plug…refill the fuel tank…
46
…and your engine should be ready for use.

Applicable Product Model

Parts Needed
Float
Float
$15.64
Recommended Tools and Accessories
Fuel Tank
Fuel Tank
$31.52
Fuel Tank
Fuel Tank
$54.38
Total$0.00

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