This is the Briggs & Stratton Vanguard 16 HP 479cc Vertical Shaft Engine 305777-3136-G1.

Briggs & Stratton Engines are designed to deliver reliable and efficient power for a wide range of 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: Provides extended engine life and durability.
  Full Pressure Lubrication: Assures controlled lubrication for extended component life, especially in varying operating conditions.
  
• Dual-Clean Air Cleaner: A pleated paper filter with a foam pre-cleaner that ensures maximum protection against dirt ingestion.
  
• Maintenance-Free Magnetron Electronic Ignition:Designed for quick, dependable starts.
  
• EPA Compliant:Meets environmental standards for reduced emissions.

Product Specifications:

• Engine Series Vanguard Series
  
• Horsepower 16 HP
  
• Engine Displacement 479 cc
  
• Engine Configuration Vertical shaft
  
• Cylinders Single
  
• Valve Type Overhead Valve (OHV)
  
• Cylinder Sleeve Dura-Bore cast iron
  
• Lubrication System Full pressure lubrication with spin-on oil filter
  
• Starter Type Electric start with recoil backup
  
• Alternator 20 Amp
  
• Fuel Type Gas
  
• Muffler Not included
  
• Fuel Tank None (uses remote mount tank)
  
• Oil Capacity 1.5 quarts (1.4 L)