Briggs & Stratton 394281 394281S Primer Bulb for Quantum Engines

Replacement carburetor primer bulb assembly for select Briggs & Stratton Quantum, 12 CID and compatible vertical-shaft engines using Briggs & Stratton 394281 / 394281S with a matching fuel tank-mounted carburetor.

Reference Part Numbers

Briggs & Stratton: 394281, 394281S

Fits Select Briggs & Stratton Engines

Quantum Series

• Quantum 35

• Quantum 40

• Quantum 45

• Quantum 50

• Quantum 55

• Quantum 60

• Select Quantum XM engines

• Select Quantum XTE engines

• Quantum series designation alone does not confirm compatibility. The engine must use the compatible tank-mounted carburetor and primer configuration.

Fits Select 12 CID / 120000-Series Engines

• Select Briggs & Stratton 12 CID engines
• Select 120000-Series engines
• Select vertical-shaft mower engines originally using 394281 / 394281S with the matching tank-mounted carburetor

Also fits select additional Briggs & Stratton engines originally using 394281 / 394281S and the same primer-style carburetor system.

Fits Select Lawn Mower Brands

Fits select Toro, Craftsman, Murray, MTD, Yard Machines and Lawn-Boy walk-behind lawn mowers powered by compatible Briggs & Stratton Quantum, 12 CID or other vertical-shaft engines originally using 394281 / 394281S with the matching tank-mounted carburetor and primer system.

Fits Select Applications

• Common applications include select push, self-propelled and other walk-behind lawn mowers equipped with compatible Briggs & Stratton engines using the listed primer assembly.

Specifications

• Product Type: Carburetor Primer Bulb Assembly
• Briggs & Stratton Part Numbers: 394281, 394281S
• Application: Fuel Tank-Mounted Carburetor Primer System
• Engine Type: Select Vertical-Shaft Small Engines
• Replacement Type: Aftermarket
• Quantity: 1

Designed to replace a cracked, hardened or damaged primer and restore proper fuel priming for easier engine starting.

Important Fitment Information

Briggs & Stratton Quantum, 12 CID and 120000-series engines may use different carburetors and primer configurations depending on the complete engine Model, Type, Code and production configuration.

This primer bulb assembly is intended only for select applications originally using Briggs & Stratton 394281 / 394281S with a compatible fuel tank-mounted carburetor and matching primer configuration.

Quantum series designation, engine displacement, equipment brand or physical primer appearance alone does not confirm compatibility. Similar-looking primer bulbs may use different dimensions or mounting configurations and may not be interchangeable.

Please verify your original primer part number and complete Briggs & Stratton engine Model, Type and Code before ordering. Compare the carburetor and primer mounting configuration with your original part where possible.