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696457 ALTERNATOR
$47.05
5104553FS PULLEY, Crankshaft
$80.00
844813 STUD
$9.77
84010829
$96.00
691886 GASKET-INTAKE
$6.19
696457 ALTERNATOR
$47.05
5104553FS PULLEY, Crankshaft
$80.00
844813 STUD
$9.77
84010829
$96.00
691886 GASKET-INTAKE
$6.19
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- 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
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Item Number: 591378
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Brand: Briggs & Stratton
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Part Type: Carburetor
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Engine Type: Small single-cylinder engines
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Application: Lawn mowers and other outdoor power equipment powered by compatible Briggs & Stratton engines
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Condition: New Genuine OEM Replacement Part
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Function: Mixes air and fuel for proper combustion in the engine
Function
This carburetor is engineered to:
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Accurately blend air and fuel for optimal engine combustion
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Restore smooth engine performance and starting reliability
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Improve idle and throttle response
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Replace worn, clogged, or failed carburetor units in compatible engines
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Maintain proper fuel delivery for peak engine output
Verify Fitment Before Ordering
Before ordering, confirm the following:
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Engine model and series on your equipment
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Compatibility with Briggs & Stratton small engines that originally used carburetor part 591378 or its superseded equivalents
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Proper mounting and linkage style matching your engine’s 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:
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796321
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696132
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696133
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796322
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699958
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697351
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699966
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698455
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695918
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694952
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695919
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695330
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796323
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695920
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695328
⚠️ Exact engine model compatibility must be confirmed using your machine’s engine tag or parts lookup tool.
Installation / Usage
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Drain or cap the fuel system to avoid spills during installation
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Disconnect the spark plug to prevent accidental starts
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Remove the air filter and housing to access the carburetor
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Disconnect throttle and choke linkages carefully
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Unbolt the old carburetor and remove it from the engine
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Install the new 591378 carburetor, aligning all gaskets and mounting bolts
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Reconnect linkages and air filter assembly
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Test engine operation and adjust as needed
Maintenance Tips
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Use clean, fresh gasoline to prevent carburetor clogging
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Add a fuel stabilizer if the machine is stored for long periods
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Inspect and clean fuel screens and filters regularly
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Keep choke and throttle linkages free of debris
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Tune idle and mixture screws per manufacturer recommendations
Equivalent / Replaces Part Numbers
Replaces these older Briggs & Stratton carburetor part numbers and equivalents:
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796321, 696132, 696133, 796322, 699958, 697351, 699966, 698455, 695918, 694952, 695919, 695330, 796323, 695920, 695328


