How to Adjust Briggs & Stratton Carburetors
Briggs & Stratton has been around for nearly 100 years, pioneering the gasoline engine for the outdoor power equipment industry, according to its website. It has expanded to offer a variety of equipment. Carburetors are essential components of the Briggs & Stratton internal combustion engines used for yard care. A carburetor is designed to mix fuel with air, regulate the ratio of the two and feed it into the engine, where it is ignited. If your carburetor has a screw, then adjusting it is a simple task. Does this Spark an idea?
Other People Are Reading
Instructions
-
-
1
Unscrew the lock nut with your fingers on top the air filter box and check the air filter to make sure that it is clean. If the filter needs replacing, do so at this time.
-
2
Fill the fuel tank about half full.
-
-
3
Start the engine and let it warm up to operating temperature for about two minutes.
-
4
Turn off the choke once the engine starts.
-
5
Move the speed control or throttle to the max position.
-
6
Turn with your fingers the carburetor adjustment screw slowly in a clockwise direction until the engine begins to cut out. Use a standard screw driver or snub nose pliers on the adjustment screw, if it does not turn by hand. Turn a fraction of a turn at a time. This may be one and one-half to two turns depending on the type of Briggs and Stratton engine that you have. Remember the number of turns needed.
-
7
Adjust the screw in the counterclockwise direction until the engine RPM drops off due to too rich of a mixture. Remember the number of these turns, too.
-
8
Turn the adjustment screw to the mid point between the two numbers.
-
9
Use the throttle to put the engine in idle.
-
10
Turn the idle adjustment screw clockwise until the RPM decreases. Remember the number of turns. Not all Briggs and Stratton engines have an idle screw adjustment, so skip the following steps, if they are not applicable.
-
11
Turn the idle adjustment screw counter clockwise until the RPM drops off. Remember the number of turns.
-
12
Turn the idle adjustment screw to the mid point between the two numbers.
-
1
Tips & Warnings
Wait a few seconds after each adjustment.
References
- Photo Credit cutting grass image by katja kodba from Fotolia.com
