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Briggs & Stratton 25T237-0085-F1 Horizontal XR Professional Series Engine

The Briggs & Stratton 25T237-0085-F1 XR2100 Professional Series horizontal engine is designed to deliver dependable power in demanding commercial, industrial and outdoor-equipment applications. Its 420cc single-cylinder OHV design produces 13.5 gross horsepower and 21 ft-lb of gross torque, making it suitable for log splitters, pressure washers, compressors, tillers, pumps, blowers and other compatible machinery.

Key Features

  • XR2100 Professional Series engine
  • 420cc single-cylinder OHV design
  • Rated at 13.5 gross horsepower
  • Produces 21 ft-lb gross torque
  • Electric start with recoil backup
  • Nine-amp charging system
  • Dura-Bore cast-iron cylinder sleeve
  • PTO-side ball bearing
  • Dual Clean air-filtration system
  • Magnetron electronic ignition
  • Integrated low-oil sensor
  • One-inch keyed horizontal crankshaft
  • Fuel tank and muffler included
  • Suitable for demanding commercial applications
  • Supersedes model 25T237-0045-F1

Specifications

Specification Details
Brand Briggs & Stratton
Model 25T237-0085-F1
Series XR2100 Professional Series
Engine type Single-cylinder, four-stroke OHV
Shaft orientation Horizontal
Displacement 420cc
Gross horsepower 13.5 HP
Gross torque 21 ft-lb
Maximum speed 3,600 RPM
Starting system Electric with recoil backup
Charging system 9-amp
Crankshaft diameter 1 in.
Crankshaft length 3-31/64 in.
Keyway 1/4 in. square
Crankshaft end Drilled and tapped 7/16-20
PTO height Approximately 5-1/4 in.
PTO rotation Counterclockwise when viewed from PTO
Ignition Magnetron electronic
Air cleaner Dual Clean paper element with foam pre-cleaner
Cylinder sleeve Dura-Bore cast iron
PTO bearing Ball bearing
Oil capacity 37 fl. oz.
Low-oil sensor Yes
Fuel-tank capacity Approximately 7 qt.
Fuel tank Included
Muffler Included
Approximate dimensions 14.5 × 18.1 × 18.3 in.
Approximate dry weight 72 lb.
EPA compliant Yes
Warranty 2 years consumer / 1 year commercial

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