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Briggs & Stratton 2100 Series Horizontal OHV Engine — 420cc, Model# 25T237-0045-F1

Item# 51632
 
 
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Briggs & Stratton 2100 Series Horizontal OHV Engine — 420cc, Model# 25T237-0045-F1

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Only $519.99
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  • Overhead valve design runs cooler and cleaner, delivering more power, longer engine life and improved fuel economy
  •  Aluminized Lo-Tone muffler resists corrosion for longer life and provides exceptionally quiet operation
  • Dual ball bearings reduce wear for longer life
  • Dura-Bore™ cast iron cylinder sleeve withstands wear and abuse while providing improved oil control
  • DuraLube® gear-driven splash lubrication system continuously supplies oil to all internal parts
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Factory Shipped —
Estimated Delivery: 5 - 7 Business Days
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Product Summary

The Briggs & Stratton 2100 Series Horizontal OHV Engine provides easy starting with Magnetron® electronic ignition and OHV for greater durability and reduced emissions. Includes a Maxi-Clean™ air filter and a Lo-Tone muffler. Great for high-performance mowing.

What's Included
  •  (1) Engine, Model# 25T237-0045-F1

Features + Benefits

  • Overhead valve design runs cooler and cleaner, delivering more power, longer engine life and improved fuel economy
  •  Aluminized Lo-Tone muffler resists corrosion for longer life and provides exceptionally quiet operation
  • Dual ball bearings reduce wear for longer life
  • Dura-Bore™ cast iron cylinder sleeve withstands wear and abuse while providing improved oil control
  • DuraLube® gear-driven splash lubrication system continuously supplies oil to all internal parts
  • Flat panel pleated automotive-type air filter for superior engine protection
  • Magnetron electronic ignition delivers quick, dependable starts with no maintenance required
Key Specs
Item# 51632
Brand Briggs & Stratton
Manufacturer's Warranty 24 months parts / 24 months labor
Ship Weight 74.0 lbs
Engine Displacement (cc) 420
Start Type Electric
Engine Type OHV
Torque (ft./lbs.) 21
Shaft Output Horizontal
Crankshaft 1 x 3 31/64
Shaft Diameter (in.) 1
Shaft Length (in.) 3 31/64
Shaft Keyway (in.) 1/4
Shaft End Tapped (Diameter (in.)/Threads per inch) 7/16-24
Gear Reduction No
PTO Height (in.) 5 1/4
Bearing Type Dual ball
Cylinders (qty.) 1
Cylinder Bore Aluminum cast iron sleeve
Bore x Stroke (in.) 3.54 x 2.6
Cooling System Air cooled
Air Cleaner Type Pleated paper w/foam pre-cleaner
Fuel Tank Yes
Fuel Type Gasoline
Fuel Tank Capacity (qt.) 6.9
Fuel Pump Gravity fed
Fuel Filter In-tank
Oil Capacity (qt.) 1 5/32 (37 oz.)
Lubrication System Splash
Low Oil Alert Yes, Oil Guard
Low Oil Shutdown No
Ignition System Magnetron electronic ignition
Governor System Mechanical
Carburetor Float-fed
Throttle Control Manual
Choke Control Manual
Max. RPM 3,600
Charging System Amps 9
Muffler Included Yes
Flywheel Brake No
Auto Compression Release Yes
Bolt Circle (in.) 3 5/8, 5, 6 1/2
Mounting Base L x W (in.) 7.69 x 4.05
Mounting Bolt Pattern L x W (in.) 7.69 x 4.05
Dimensions L x W x H (in.) 19 5/8 x 16 1/4 x 18 1/4
EPA/CARB Approval (California Air Resource Board) Yes

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Replacement Parts
Call To Order: 1-800-657-0516

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Sat 7:00 AM - 3:00 PM (Central)

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Briggs & Stratton 2100 Series Horizontal OHV Engine — 420cc, Model# 25T237-0045-F1 The price is $519.99.
Briggs & Stratton 2100 Series Horizontal OHV Engine — 420cc, Model# 25T237-0045-F1
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Estimated Delivery: 5 - 7 Business Days
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Hide Similarities
Engine Displacement (cc)
420 479 479 479 570
Start Type
Electric Electric - Electric w/recoil backup Electric
Application - Compressor, pressure washer, conveyor - Compressor, pressure washer, conveyor Compressor, pressure washer, conveyor
Engine Type OHV Vanguard V-Twin OHV Vanguard V-Twin OHV Vanguard V-Twin OHV Vanguard V-Twin OHV
Torque (ft./lbs.) 21 24.00 - - -
Shaft Output
Horizontal Horizontal - Horizontal Horizontal
Crankshaft 1 x 3 31/64 - - - -
Shaft Diameter (in.) 1 1 1 1 1
Shaft Length (in.) 3 31/64 2 29/32 2 29/32 2 29/32 2 29/32
Shaft Keyway (in.)
1/4 1/4 - 1/4 1/4
Shaft End Tapped (Diameter (in.)/Threads per inch) 7/16-24 3/8–24 3/8–24 3/8–24 3/8–24
Shaft Rotation (From PTO Shaft Side) - Counterclockwise - Counterclockwise Counterclockwise
Gear Reduction No - - - -
PTO Height (in.)
5 1/4 5 1/4 - 5 1/4 5 1/4
Bearing Type
Dual ball Ball - Ball Ball
Cylinders (qty.)
1 2 - 2 2
Cylinder Bore
Aluminum cast iron sleeve Cast iron - Cast iron Cast iron
Bore x Stroke (in.)
3.54 x 2.6 2.68 x 2.60 2.68 x 2.60 2.68 x 2.60 2.83 x 2.76
Cooling System
Air cooled Air cooled - Air cooled Air cooled
Air Cleaner Type
Pleated paper w/foam pre-cleaner Dual element Pleated paper w/foam pre-cleaner Dual element Dual element
Fuel Tank Yes Not included - Yes Not included
Fuel Type Gasoline Gasoline - Gasoline Gasoline
Fuel Tank Capacity (qt.) 6.9 - - 9 -
Fuel Pump
Gravity fed Yes, (Pulse) - No Yes, (Pulse)
Fuel Filter In-tank - - - -
Oil Capacity (qt.)
1 5/32 (37 oz.) 1.5 (48 oz.) 1.5 1.5 (48 oz) 1.5 (48 oz.)
Lubrication System
Splash Full Pressure Full pressure w/spin-on oil filter Full pressure Full pressure
Low Oil Alert
Yes, Oil Guard - - - Yes
Low Oil Shutdown No - - - -
Ignition System
Magnetron electronic ignition Electronic - Electronic Electronic
Governor System
Mechanical Mechanical - Mechanical Mechanical
Carburetor
Float-fed Float Float Float Float
Throttle Control
Manual Adjustable for a constant speed operation, manual friction, remote - Adjustable for a constant speed operation, manual friction, remote Adjustable for a constant speed operation, manual friction, remote
Choke Control
Manual Manual, remote - Manual, remote Manual, remote
Max. RPM
3,600 3,600 - 3,600 3,600
Charging System Amps 9 16 - 16 16
Muffler Included
Yes No - Yes No
Flywheel Brake No - - - -
Auto Compression Release Yes - - - -
Bolt Circle (in.)
3 5/8, 5, 6 1/2 5, 6 1/2, 7 3/4 - 5, 6 1/2, 7 3/4 5, 6 1/2, 7 3/4
Mounting Base L x W (in.) 7.69 x 4.05 - - - -
Mounting Bolt Pattern L x W (in.) 7.69 x 4.05 7 11/16 x 4 1/16 - 7 11/16 x 4 1/16 7 11/16 x 4
Dimensions L x W x H (in.)
19 5/8 x 16 1/4 x 18 1/4 12 5/16 x 16 1/8 x 19 - 12 5/16 x 16 1/8 x 19 13 3/8 x 16 1/8 x 17 1/4
EPA/CARB Approval (California Air Resource Board)
Yes - - No Yes