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Briggs & Stratton 61G477-0007-J1 Horizontal Vanguard EFI Engine

The Briggs & Stratton 61G477-0007-J1 Horizontal Vanguard EFI Engine is a commercial-grade, high-speed marine engine designed for demanding mud-motor and industrial applications. Its 993cc V-Twin OHV configuration produces 40 gross horsepower and operates at up to 4,750 RPM.

Key Features

  • Commercial Vanguard EFI engine
  • Marine high-speed configuration
  • 40 gross horsepower
  • 993cc V-Twin displacement
  • Maximum operating speed of 4,750 RPM
  • Electronic Fuel Injection
  • Horizontal 1-1/8″ × 4″ crankshaft
  • Heavy cast-iron flywheel
  • 12-volt electric start
  • 20/50-amp charging system
  • Remote throttle control
  • Dura-Bore cast-iron cylinder sleeves
  • Full-pressure lubrication
  • Replaceable spin-on oil filter
  • Integrated oil cooler
  • Fuel pump included
  • Fuel tank not included
  • Muffler not included

Specifications

Specification Details
Brand Briggs & Stratton
Engine series Vanguard
Model number 61G477-0007-J1
Previous model 61G477-0004-J1
Engine configuration Marine/high-speed
Engine type Commercial four-stroke V-Twin
Crankshaft orientation Horizontal
Power output 40 gross HP
Displacement 993cc / 60.6 cu. in.
Number of cylinders 2
Cylinder configuration V-Twin
Valve configuration Overhead Valve (OHV)
Cooling system Air-cooled
Bore 3.37 in. / 85.6 mm
Stroke 3.41 in. / 86.6 mm
Maximum RPM 4,750 RPM
Approximate gross torque 58 ft.-lb.
Fuel system Electronic Fuel Injection
Fuel type Gasoline
Fuel pump Included
Fuel tank Not included
Throttle control Remote
Starting system 12-volt electric start
Starter type Solenoid-shift starter
Charging system 20/50-amp DC alternator
Flywheel Heavy cast iron
Lubrication system Full-pressure lubrication
Oil filter Replaceable spin-on filter
Oil-filter reference 842921
Oil cooler Included
Oil capacity 78–80 fl. oz. / 2.3–2.4 L
Recommended commercial oil Vanguard 15W-50 full synthetic
Cylinder sleeves Dura-Bore cast iron
Crankshaft diameter 1-1/8 in.
Crankshaft length 4 in.
Crankshaft end Tapped 7/16″-20
Crankshaft keyway 1/4 in.
Key stock Not included
Muffler Not included
Dry weight Approximately 132 lb.
Shipping weight Approximately 180 lb.
UPC 047282811795
Typical applications Mud motors, marine propulsion systems and compatible industrial equipment

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