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Briggs & Stratton 900 Series Horizontal OHV Engine with Electric Start — 205cc, 3/4in. x 2 27/64in. Shaft, Model# 12S437-0050-F8
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Briggs & Stratton 900 Series Horizontal OHV Engine with Electric Start — 205cc, 3/4in. x 2 27/64in. Shaft, Model# 12S437-0050-F8

Item# 24222

Only $489.99
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Estimated Delivery: 6 - 11 Business Days
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Manufacturer's Warranty: 2 years consumer use / 1 year commercial use

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Briggs & Stratton 900 Series industrial/commercial horizontal OHV engine produces 9.0 ft.-lbs. Gross Torque to get the job done. Standard shaft is designed for general use. Compact overhead valve design runs cooler and cleaner, delivering more power, longer engine life and improved fuel economy. High-flow cylinder head produces 20% more power than conventional engines, increases fuel efficiency and significantly reduces emissions. This engine has fast fuel delivery and electric start for effortless starting and smooth operation. CARB compliant engine is good for sale in all states, including California.

What's Included

  • (1) Engine with electric start, Model# 12S437-0050-F8

Features + Benefits

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Features for Briggs & Stratton 900 Series Horizontal OHV Engine with Electric Start — 205cc, 3/4in. x 2 27/64in. Shaft, Model# 12S437-0050-F8
  • 50-state compliant engine
  • 9 ft.-lbs. Gross Torque
  • OHV design for cooler operation, longer valve life
  • Dura-Bore™ cast iron cylinder sleeve withstands wear and abuse while providing improved oil control
  • PTO ball bearing
  • Flow-Tek flywheel design
  • Permanent mold piston
  • Self-lubricating heavy-duty bearing of steel-backed Teflon-coated bronze to withstand load and reduce wear
  • Mechanical governor controls throttle to deliver more power for tough chores
  • Maintenance-free Magnetron® electronic ignition for quick, dependable starts
  • Float feed carburetor for consistent one-pull starts
  • Dual-Clean™ premium air filter
  • Electric start with recoil backup
  • Recoil start has auto compression release
  • Comfort-Tek pull handle
  • Removable rewind
  • Fuel shutoff valve makes it easy to shut off fuel flow for safe transportation
  • 3-qt. fuel tank for long run times
  • DuraLube™ gear-driven splash lubrication system continuously supplies oil to all internal parts
  • Approx. mounting base dim. 6.38in. x 3.13in.
  • Flange mount bolt circle 3 5/8in.

Key Specs

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Item#24222
Ship Weight38.0 lbs
Engine Displacement (cc)205
Start TypeRecoil or electrical
ApplicationGeneral applications
Engine TypeOHV 900 Series
Torque (ft./lbs.)9.0
Shaft OutputHorizontal
Crankshaft3/4 x 2 27/64
Shaft Diameter (in.)3/4
Shaft Length (in.)2 27/64
Shaft Keyway (in.)3/16
Shaft End Tapped (Diameter (in.)/Threads per inch)5/16–24
Shaft Rotation (From PTO Shaft Side)Counterclockwise
Gear ReductionNo
PTO Height (in.)4 3/16
Bearing TypeBall
Cylinders (qty.)1
Cylinder BoreCast iron
Bore x Stroke (in.)2.69 x 2.20
Cooling SystemAir cooled
Air Cleaner TypePleated paper
Fuel TankYes
Fuel TypeGas
Fuel Tank Capacity (qt.)3
Fuel PumpNo
Fuel FilterNo
Oil Capacity (qt.)0.625
Lubrication SystemSplash
Low Oil AlertNo
Low Oil ShutdownNo
Ignition SystemElectronic
Governor SystemMechanical
CarburetorFloat
Throttle ControlManual, remote, adjustable (constant speed)
Choke ControlManual
Max. RPM3,600
Charging System Amps1.5 A DC
Muffler IncludedYes
Flywheel BrakeNo
Auto Compression ReleaseYes
Bolt Circle (in.)3 5/8
Mounting Base L x W (in.)6 3/8 x 3 1/8
Mounting Bolt Pattern L x W (in.)6 3/8 x 3 1/8
Dimensions L x W x H (in.)12 3/8 x 16 x 17
EPA/CARB Approval (California Air Resource Board)Yes

Additional Information

Engine Specs

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Extended Warranty

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Service Protection Plus

Manufacturer Warranty:
2 years consumer use / 1 year commercial use

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Briggs & Stratton 900 Series Horizontal OHV Engine with Electric Start — 205cc, 3/4in. x 2 27/64in. Shaft, Model# 12S437-0050-F8 The price is $489.99.
Briggs & Stratton 900 Series Horizontal OHV Engine with Electric Start — 205cc, 3/4in. x 2 27/64in. Shaft, Model# 12S437-0050-F8
(Not Yet Rated - New)
Item# 24222
Factory Shipped —
Estimated Delivery: 6 - 11 Business Days
Only $489.99
Hide Similarities
Engine Displacement (cc)
127 205 205 205 205
Start Type
Recoil Recoil Recoil Recoil Recoil or electrical
Application Mid-duty chore applications Tiller, compressor, edger, log splitter Tiller, compressor, edger, log splitter Log splitter, compressor, pressure washer General applications
Engine Type 550 Series OHV 800 Series OHV 800 Series OHV 900 Series OHV 900 Series
Rated Power (HP) - - - Manufacturer no longer rates this engine by HP -
Torque (ft./lbs.)
5.5 8.0 8.0 9.00 9.0
Shaft Output
Horizontal Horizontal Horizontal Horizontal Horizontal
Crankshaft 5/8 x 2 27/64 1 x 2 7/8 3/4 x 2 27/64 - 3/4 x 2 27/64
Shaft Diameter (in.) 5/8 1 3/4 3/4 3/4
Shaft Length (in.) 2 27/64 2 7/8 2 27/64 2 27/64 2 27/64
Shaft Keyway (in.)
3/16 1/4 1/4 3/16 3/16
Shaft End Tapped (Diameter (in.)/Threads per inch) 1/4–28 3/8–24 5/16–24 5/16–24 5/16–24
Shaft Rotation (From PTO Shaft Side) Counterclockwise Counterclockwise Counterclockwise Counterclockwise Counterclockwise
Gear Reduction
No No No - No
PTO Height (in.)
4.17 4 3/16 4 3/16 4 11/64 4 3/16
Bearing Type
Ball Plain Ball Ball Ball
Cylinders (qty.)
1 1 1 1 1
Cylinder Bore
Cast iron Aluminum Aluminum Cast iron Cast iron
Bore x Stroke (in.)
2.44 x 1.65 2.69 x 2.20 2.69 x 2.20 2.69 x 2.20 2.69 x 2.20
Cooling System
Air cooled Air cooled Air cooled Air cooled Air cooled
Air Cleaner Type
Dual element Pleated paper Pleated paper Dual element Pleated paper
Fuel Tank Yes Yes Yes Yes Yes
Fuel Type Gasoline Gas Gas Gasoline Gas
Fuel Tank Capacity (qt.)
2 2.9 3 3 3
Fuel Pump
No No No No No
Fuel Filter
Yes No No No No
Oil Capacity (qt.)
0.625 0.625 0.625 .625 (20 oz.) 0.625
Lubrication System
Splash Splash Splash Splash Splash
Low Oil Alert
No No No No No
Low Oil Shutdown
No No No No No
Ignition System
Electronic Electronic Electronic Electronic Electronic
Governor System
Mechanical Mechanical Mechanical Mechanical Mechanical
Carburetor
Float Float Float Float Float
Throttle Control
Manual Manual, remote, adjustable (constant speed) Manual, remote, adjustable (constant speed) Manual, remote, adjustable (constant speed) Manual, remote, adjustable (constant speed)
Choke Control
Manual Manual Manual Manual Manual
Max. RPM
3,300 3,600 3,600 3,600 3,600
Charging System Amps No - - - 1.5 A DC
Muffler Included
Yes Yes Yes Yes Yes
Flywheel Brake
- No No No No
Auto Compression Release
Yes Yes Yes Yes Yes
Bolt Circle (in.)
- 3 5/8 flange mount 3 5/8 flange mount 3 5/8 3 5/8
Mounting Base L x W (in.)
7 x 4 6 3/8 x 3 1/8 6 3/8 x 3 1/8 7 3/8 x 4 6 3/8 x 3 1/8
Mounting Bolt Pattern L x W (in.) 6 3/8 x 3 1/8 6 3/8 x 3 1/8 6 3/8 x 3 1/8 6 3/8 x 3 1/8 6 3/8 x 3 1/8
Dimensions L x W x H (in.)
13 x 15 x 13 8 1/2 x 15 1/2 x 15 1/4 8 1/2 x 15 1/2 x 15 1/4 12 3/8 x 16 x 17 12 3/8 x 16 x 17
EPA/CARB Approval (California Air Resource Board)
Yes Yes Yes Yes Yes