591378 Briggs & Stratton Carburetor Genuine OEM Engine Replacement Part

Description

591378 Briggs & Stratton Carburetor Genuine OEM Engine Replacement Part

The Briggs & Stratton 591378 Carburetor is a genuine OEM replacement carburetor designed to deliver reliable fuel and air mixing for small Briggs & Stratton engines, particularly 20 cu. in. horizontal OHV single-cylinder engines. It ensures smooth combustion, consistent power delivery, and improved engine performance for lawn mowers and other outdoor power equipment.

Product Details

• Item Number: 591378

• Brand: Briggs & Stratton

• Part Type: Carburetor

• Engine Type: Small single-cylinder engines

• Application: Lawn mowers and other outdoor power equipment powered by compatible Briggs & Stratton engines

• Condition: New Genuine OEM Replacement Part

• Function: Mixes air and fuel for proper combustion in the engine

Function

This carburetor is engineered to:

• Accurately blend air and fuel for optimal engine combustion

• Restore smooth engine performance and starting reliability

• Improve idle and throttle response

• Replace worn, clogged, or failed carburetor units in compatible engines

• Maintain proper fuel delivery for peak engine output

Verify Fitment Before Ordering

Before ordering, confirm the following:

• Engine model and series on your equipment

• Compatibility with Briggs & Stratton small engines that originally used carburetor part 591378 or its superseded equivalents

• Proper mounting and linkage style matching your engines setup

Carburetor compatibility must be verified against your engine model number part fitment varies by engine series.

Compatibility

This carburetor fits a range of Briggs & Stratton small engines, especially horizontal 20 cu. in. OHV series and others that originally used part 591378. It also replaces many older carburetor numbers including:

• 796321

• 696132

• 696133

• 796322

• 699958

• 697351

• 699966

• 698455

• 695918

• 694952

• 695919

• 695330

• 796323

• 695920

• 695328

Exact engine model compatibility must be confirmed using your machines engine tag or parts lookup tool.

Installation / Usage

1. Drain or cap the fuel system to avoid spills during installation

2. Disconnect the spark plug to prevent accidental starts

3. Remove the air filter and housing to access the carburetor

4. Disconnect throttle and choke linkages carefully

5. Unbolt the old carburetor and remove it from the engine

6. Install the new 591378 carburetor, aligning all gaskets and mounting bolts

7. Reconnect linkages and air filter assembly

8. Test engine operation and adjust as needed

Maintenance Tips

• Use clean, fresh gasoline to prevent carburetor clogging

• Add a fuel stabilizer if the machine is stored for long periods

• Inspect and clean fuel screens and filters regularly

• Keep choke and throttle linkages free of debris

• Tune idle and mixture screws per manufacturer recommendations

Equivalent / Replaces Part Numbers

Replaces these older Briggs & Stratton carburetor part numbers and equivalents:

• 796321, 696132, 696133, 796322, 699958, 697351, 699966, 698455, 695918, 694952, 695919, 695330, 796323, 695920, 695328