This is the Briggs & Stratton 10.5 HP 344cc Vertical Shaft Engine 21R702-0128-F1.

Our E1050 10.5 Gross HP engines offer an excellent power to weight ratio. This ensures that you get maximum performance without sacrificing comfort and usability.

The model 21R702-0128-F1 boasts 344 CC, a 3.44 in. (87.38 mm) bore, and 2.26 in. (57.40 mm) stroke sending power to a robust 1 in by 3-532 shaft. Your new Briggs and Stratton engine is backed by a history of excellence as well as a very competitive warranty.

Briggs Stratton Engines are designed to deliver reliable and efficient power for a wide range of outdoor applications. These engines are built with high-quality materials and advanced engineering to ensure long-lasting performance and dependability.

Features:

• Dura-Bore cast iron cylinder sleeve for extended life
  
• Float carburetor for consistent easy starting
  
• Overhead valve design (OHV) for cooler operation and longer valve life
  
• EPA compliant: Which means it meets all stringent environmental standards, ensuring reduced emissions and a cleaner running engine.

Product Specifications:

• Engine Power 10.5 Gross HP
  
• Engine Displacement 344 cc
  
• Cylinder(s) Single cylinder with Dura-Bore cast iron sleeve
  
• Bore and Stroke 3.44 in. (87.38 mm) bore and 2.26 in. (57.40 mm) stroke
  
• Shaft Orientation Vertical
  
• Crankshaft Dimensions 1 inch diameter by 3-5/32 inches length
  
• Starting System Recoil start (manual pull start)
  
• Fuel System Float carburetor and includes a fuel pump
  
• Oil Capacity 48 fl. oz. (approximately 1.4 L)
  
• Ignition System Maintenance-free Magnetron electronic ignition