Briggs & Stratton Horizontal 23 HP Vanguard 1″ x 2-29/32 #386447-3079 (386447-0090)

Briggs & Stratton Vanguard 23 HP Horizontal Shaft Engine 386447-3079 / 386447-0090

The Briggs & Stratton Vanguard 23 HP Horizontal Shaft Engine is a heavy-duty commercial-grade V-Twin engine designed for demanding lawn equipment, industrial machinery, pressure washers, generators, construction equipment, and other high-performance applications. Built with Vanguard’s premium engineering, this engine delivers exceptional power, durability, fuel efficiency, and long service life even under continuous heavy workloads.

Featuring a powerful 627cc V-Twin OHV design, this engine provides smooth operation, strong torque output, and dependable performance in challenging environments. The Dura-Bore cast iron cylinder sleeves, full-pressure lubrication system, spin-on oil filter, and integrated oil cooler help reduce wear, improve cooling, and extend engine life for commercial and professional use.

Its horizontal shaft configuration with a 1-inch diameter crankshaft makes it an ideal replacement engine for a wide variety of equipment requiring reliable power and consistent operation. The electric start system and 16-amp charging alternator ensure quick starts and dependable electrical support for accessories and equipment systems.

Product Specifications:

• Brand: Briggs & Stratton
• Engine Series: Vanguard V-Twin
• Model Number: 386447-3079 / 386447-0090
• Engine Type: 4-Cycle OHV V-Twin Gas Engine
• Horsepower: 23 HP
• Displacement: 627cc
• Shaft Orientation: Horizontal Shaft
• Shaft Diameter: 1 Inch
• Shaft Length: 2-29/32 Inches
• Shaft End: Drilled & Tapped 3/8″-24
• Keyway Size: 1/4 Inch
• Starting System: Electric Start
• Charging System: 16 Amp Alternator
• Lubrication System: Full Pressure Lubrication
• Oil Filter: Spin-On Oil Filter
• Oil Cooler: Integrated Oil Cooler
• Fuel Pump: Included
• Air Filtration: Dual-Clean Air Cleaner System
• Fuel Tank: Not Included
• Muffler: Not Included
• Maximum RPM: 3600 RPM
• Number of Cylinders: 2
• Fuel Type: Gasoline
• Cooling System: Air-Cooled Engine Design
• Warranty: Up to 3-Year Manufacturer Warranty (varies by application)

Approximate Dimensions:

• Length: 18–20 Inches
• Width: 17–19 Inches
• Height: 18–20 Inches
• Shipping Weight: Approx. 92–100 lbs

Key Features:

• Powerful 23 HP Commercial-Grade Performance
Provides strong horsepower and torque for demanding industrial, agricultural, and landscaping equipment.

• Vanguard V-Twin OHV Technology
Overhead valve design improves fuel efficiency, cooling performance, and engine durability.

• Dura-Bore Cast Iron Cylinder Sleeves
Engineered for superior wear resistance and extended service life under heavy-duty operation.

• Full Pressure Lubrication System
Delivers continuous oil circulation for improved protection and reduced internal engine wear.

• Integrated Oil Filter & Oil Cooler
Helps maintain cleaner oil, lower operating temperatures, and longer engine life.

• Electric Start Convenience
Reliable key-start operation allows fast and easy engine starting.

• Heavy-Duty Air Filtration System
Dual-Clean filtration protects the engine from dirt, dust, and debris in harsh working environments.

• Fuel Pump Included
Ensures consistent fuel delivery and dependable performance during extended operation.

• Universal Replacement Design
Suitable for commercial lawn equipment, generators, pumps, construction machinery, log splitters, and industrial applications.

Package Includes:

• Briggs & Stratton Vanguard 23 HP Engine
• Electric Starter System
• Fuel Pump
• Oil Filter
• Oil Cooler Assembly
• Manufacturer Documentation

Built for professionals who need dependable power and long-term reliability, the Briggs & Stratton Vanguard 23 HP Horizontal Shaft Engine delivers commercial-grade performance, exceptional durability, and trusted Vanguard engineering for demanding equipment and replacement engine applications.