Product Description
Briggs & Stratton 21R702-0128-F1 - 10.5 HP 344cc Vertical Shaft Engine
The Briggs & Stratton 21R702-0128-F1 is a 10.5 horsepower 344cc vertical shaft engine designed for lawn and turf equipment requiring dependable torque and consistent performance. Built on Briggs & Stratton’s professional-grade single-cylinder OHV platform, this engine is engineered for durability, smooth operation, and reliable starting.
Commonly used on walk-behind mowers and other vertical shaft applications, the 21R702-0128-F1 delivers strong blade-drive performance and long service life in residential and light commercial environments.
(Replaces Briggs & Stratton Engines 217902-4020-F1 & 21R702-0070-F1)
- Engines Built Prior to 07/12/2012 should use short block 697740. Engines built on or after 07/12/2012 should use short block 592055.
Technical Specifications
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Brand: Briggs & Stratton
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Model: 21R702-0128-F1
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Engine Type: 4-Cycle, Air-Cooled, OHV Single Cylinder
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Displacement: 344cc
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Gross Horsepower: 10.5 HP
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Starting System: Recoil Start
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Shaft Orientation: Vertical
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Crankshaft Diameter: 7/8″
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Crankshaft Length: 3-5/32″
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Keyway Size: 3/16″
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Lubrication System: Splash Lubrication
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Ignition System: Magnetron Electronic Ignition
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Fuel System: Carbureted
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Cooling System: Air-Cooled
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Fuel Type: Gasoline
Key Features
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10.5 HP Output – Designed for strong vertical blade-drive performance
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344cc OHV Engine Platform – Efficient combustion and torque delivery
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7/8″ x 3-5/32″ Vertical Crankshaft – Standard mower configuration
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Cast Iron Cylinder Sleeve – Enhanced durability and wear resistance
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Magnetron Electronic Ignition – Reliable starting and spark consistency
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Splash Lubrication System – Simplified maintenance design
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Precision-Balanced Components – Reduced vibration during operation
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Air-Cooled System – Maintains stable operating temperatures
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Durable Crankcase Construction – Built for residential and light commercial use
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Genuine Briggs & Stratton OEM Engine – Not aftermarket
Warranty
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Manufacturer: Briggs & Stratton
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Commercial Warranty: 90-Day Limited
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Consumer / Residential Warranty: 2-Year Limited
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Coverage Subject To: Briggs & Stratton factory warranty terms, proper installation and maintenance
***NO RETURNS OR EXCHANGES ON ENGINES. ALL ENGINE SALES ARE FINAL.
ALL ENGINES ARE BRAND NEW WITH FULL FACTORY WARRANTY.***
