How to Adjust a Briggs & Stratton 5HP Carburetor

Written by yvonne grant
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The 5 horsepower Briggs and Stratton engine mounts on many different outdoor power tools. From pressure washers to generators and lawnmowers, the Briggs and Stratton engine is an industry standard. The carburettor on the engine is responsible for sending the mixture of gasoline and oxygen to the engine cylinder for combustion. When the engine begins to surge or will no longer run in the idle position; an adjustment to the carburettor needs to be made. This procedure will take approximately 5 minutes to complete.

Skill level:
Moderately Easy

Things you need

  • Tachometer
  • Flathead screwdriver

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  1. 1

    Set the engine on a flat workbench. Start the engine and set the throttle to the "fast" position. Allow the engine to warm for 2 minutes.

  2. 2

    Set the throttle to the "slow" idle; turn on the tachometer and wrap the lead from the tachometer around the spark plug wire located at the front of the engine.

  3. 3

    Locate the carburettor on the left side of the engine; on top of the carburettor is an adjustment screw. Turn the screw clockwise to increase the rpm and counterclockwise to decrease the rpm until the tachometer reads 1750rpm.

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