This is the Briggs & Stratton Vanguard 16 HP 479cc Horizontal Shaft Engine 305447-0035-G1.

The Small Block V-Twin Vanguard engine is designed-engineered to handle the most demanding commercial applications. Energetic and quick starting, these powerhouse engines feature a number of advanced technologies and integrated components, while also being lighter and more compact than leading competitor's engines.

Features:

• 479cc
  
• Advanced Debris Management
  
• Full Pressure Lubrication w Spin-On Oil Filter
  
• Oil Cooler
  
• Centrally Located Oil Pump and Pickup

Product Specifications:

• Engine Power 16.0 Gross HP
  
• Displacement 479 cc
  
• Cylinders Two, V-Twin configuration
  
• Shaft Orientation Horizontal
  
• Shaft Details 1-1/8" diameter x 4" length, with a 1/4" keyway
  
• Starting System 12 Volt Gear Drive Electric Starter
  
• Charging System 16 Amp DC Alternator
  
• Lubrication System Full pressure with spin-on oil filter
  
• Air Cleaner Dual-Clean (pleated paper filter with a foam pre-cleaner)
  
• Oil Capacity 48 fl oz (approximately 1.4 litres)