This is the Briggs & Stratton Vanguard 16 HP 479cc Horizontal Shaft Engine 305447-0335-F1.

This engine is designed for demanding commercial applications and is known for its durability and performance.

Product Specifications:

• Gross Horsepower: 16.0 HP
  
• Engine Displacement: 479 cc
  
• Cylinders: Two (V-Twin configuration)
  
• Crankshaft Orientation: Horizontal
  
• Cylinder Bore: Dura-Bore cast iron sleeve for extended life
  
• Starting Type: Electric start with recoil backup
  
• Lubrication System: Full pressure lubrication with spin-on oil filter
  
• Oil Capacity: Approximately 48 fl. oz. (1.42 L)
  
• Air Cleaner: Dual-Clean pleated paper filter with a foam pre-cleaner
  
• Shaft Details: 1-inch diameter, keyway, tapped 3/8"-24