This is the Briggs & Stratton Vanguard 18 HP 570cc Horizontal Shaft Engine 356447-3549-G1.

This engine is a V-Twin, Overhead Valve (OHV) engine designed for commercial and industrial use, known for its durability and performance.

Features:

• Dura-Bore Cast Iron Cylinder Sleeve: Provides enhanced durability and extended engine life.
  
• Full Pressure Lubrication:Paired with a spin-on oil filter and oil cooler, this system ensures consistent and controlled lubrication, which helps extend component life.
  
• Overhead Valve (OHV) Design:Leads to cooler operation, longer valve life, and improved fuel economy.
  
• Dual-Clean Air Cleaner:Offers maximum protection for the engine in dusty or debris-heavy environments.
  
• Commercial Quality Components:Designed and tested to meet commercial engine standards.

Product Specifications:

• Engine Series Briggs & Stratton Vanguard Series
  
• Horsepower (HP) 18 HP
  
• Displacement 570 cc
  
• Cylinders V-Twin configuration
  
• Shaft Orientation Horizontal
  
• Ignition System Maintenance-free Magnetron electronic ignition
  
• Starting Type Electric start and Recoil start
  
• Lubrication System Full pressure lubrication with spin-on oil filter and oil cooler
  
• Air Cleaner Dual-Clean pleated paper filter with a foam pre-cleaner
  
• Fuel Type Unleaded gasoline
  
• Oil Capacity 48 fl. oz. (1.42 L)
  
• Cylinder Sleeve Dura-Bore cast iron sleeve for extended life