Video & Articles: Appliance & Equipment RepairBriggs & Stratton Riding Lawn Mower Throttle Rod Spring 691842

Briggs & Stratton Riding Lawn Mower Throttle Rod Spring 691842

03:46
This video provides step-by-step repair instructions for replacing the throttle rod spring (also called the extension spring or governor spring) on a Briggs and Stratton small engine. The most common reason for replacing the throttle rod spring is when the engine doesn’t throttle smoothly.

All of the information for this throttle rod spring replacement video is applicable to the following brands:
Briggs & Stratton, Toro, John Deere, Lawn Boy, Craftsman, Wheel Horse

Tools needed: 1/4 inch socket or nut driver, 3/8th inch socket or nut driver

Step By Step Instructions

1
Before you replace the throttle rod spring on your engine, make sure the engine has cooled, the ignition switch is in the off position, and the key has been removed if applicable.
2
If necessary, disconnect the headlight wire harness.
3
Then, lift up the hood or engine cover and detach it.
4
Now, rotate the air filter cover retaining knobs counterclockwise and pull off the cover.
5
Lift out the air filter.
6
Use a quarter-inch socket or nut driver to unthread the screw inside the filter housing.
7
Now, use a 3/8 inch socket or wrench to unthread the four blower housing mounting bolts.
8
Detach the oil drain tube and lift off the blower housing.
9
Now, detach the throttle rod and spring from the carburetor.
10
Lift up the rod to detach it from the governor arm, then detach the spring if still intact.
11
Install the new throttle rod spring by sliding it onto the rod from the hooked end.
12
Now, connect the short end of the spring to the governor arm, as well as the Z end of the rod.
13
Attach the opposite end of the spring and the hooked end of the rod to the carburetor.
14
Reposition the blower housing.
15
Make sure the housing is properly seated on the air diverter.
16
Rethread and tighten the mounting bolts to secure the housing.
17
The longer bolts go in the back.
18
Replace the screw in the filter housing.
19
Reposition the air filter, realign the cover, and rotate the retaining knobs clockwise to secure.
20
Reattach the oil drain tube to the blower housing.
21
Reinstall the hood or engine cover and reconnect the headlight wire harness if applicable.
Description
This video provides step-by-step repair instructions for replacing the throttle rod spring (also called the extension spring or governor spring) on a Briggs and Stratton small engine. The most common reason for replacing the throttle rod spring is when the engine doesn’t throttle smoothly.

All of the information for this throttle rod spring replacement video is applicable to the following brands:
Briggs & Stratton, Toro, John Deere, Lawn Boy, Craftsman, Wheel Horse

Tools needed: 1/4 inch socket or nut driver, 3/8th inch socket or nut driver
Step-By-Step Instructions
1
Before you replace the throttle rod spring on your engine, make sure the engine has cooled, the ignition switch is in the off position, and the key has been removed if applicable.
2
If necessary, disconnect the headlight wire harness.
3
Then, lift up the hood or engine cover and detach it.
4
Now, rotate the air filter cover retaining knobs counterclockwise and pull off the cover.
5
Lift out the air filter.
6
Use a quarter-inch socket or nut driver to unthread the screw inside the filter housing.
7
Now, use a 3/8 inch socket or wrench to unthread the four blower housing mounting bolts.
8
Detach the oil drain tube and lift off the blower housing.
9
Now, detach the throttle rod and spring from the carburetor.
10
Lift up the rod to detach it from the governor arm, then detach the spring if still intact.
11
Install the new throttle rod spring by sliding it onto the rod from the hooked end.
12
Now, connect the short end of the spring to the governor arm, as well as the Z end of the rod.
13
Attach the opposite end of the spring and the hooked end of the rod to the carburetor.
14
Reposition the blower housing.
15
Make sure the housing is properly seated on the air diverter.
16
Rethread and tighten the mounting bolts to secure the housing.
17
The longer bolts go in the back.
18
Replace the screw in the filter housing.
19
Reposition the air filter, realign the cover, and rotate the retaining knobs clockwise to secure.
20
Reattach the oil drain tube to the blower housing.
21
Reinstall the hood or engine cover and reconnect the headlight wire harness if applicable.

Applicable Product Model

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