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Briggs & Stratton 850 Professional-Series Commercial Replacement Push Mower Engine — 190cc, 7/8in. x 3 5/32in. Shaft, Model# 121Q72-2020-F1
Briggs & Stratton 850 Professional-Series Commercial Replacement Push Mower Engine — 190cc, 7/8in. x 3 5/32in. Shaft, Model# 121Q72-2020-F1
 
 
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Briggs & Stratton 850 Professional-Series Commercial Replacement Push Mower Engine — 190cc, 7/8in. x 3 5/32in. Shaft, Model# 121Q72-2020-F1
 

Briggs & Stratton 850 Professional-Series Commercial Replacement Push Mower Engine — 190cc, 7/8in. x 3 5/32in. Shaft, Model# 121Q72-2020-F1

Item# 172794

Only $289.99
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Factory Shipped —
Delivery Time: 6 - 11 Business Days
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Not Available in Stores
Manufacturer's Warranty: 2 years consumer use / 1 year commercial use
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Product Details

This Briggs & Stratton 850 Professional-Series OHV vertical shaft engine for push mowers has ReadyStart® recoil start for easy, no-prime, no-choke starts.

Features for Briggs & Stratton 850 Professional-Series Commercial Replacement Push Mower Engine — 190cc, 7/8in. x 3 5/32in. Shaft, Model# 121Q72-2020-F1

Features + Benefits

  • 8in. bolt circle
  • Cast iron cylinder bore
  • Large-tube muffler reduces noise levels
  • Commercial-grade air filters with dual seals

Key Specs

Item#172794
Ship Weight30.0 lbs
Engine Displacement (cc)190
Start TypeRecoil
ApplicationPush mower
Engine Type850 Professional-series
Torque (ft./lbs.)8.5
Shaft OutputVertical
Crankshaft7/8 in. x 3 5/32in.
Shaft Diameter (in.)7/8
Shaft Length (in.)3 5/32
Shaft Keyway (in.)(2) Woodruff keys and 3/16-in. shaft keyway
Shaft End Tapped (Diameter (in.)/Threads per inch)3/8/24
Shaft Rotation (From PTO Shaft Side)CCW
Gear ReductionNo
Bearing TypeBall on PTO end, DU on flywheel
Cylinders (qty.)1
Cylinder BoreCast iron
Bore x Stroke (in.)2.69 x 2.04
Cooling SystemAir
Air Cleaner TypeCommercial-grade w/dual seal
Fuel TankYes
Fuel TypeGasoline
Fuel Tank Capacity (qt.)1.6
Fuel PumpNo
Fuel FilterNo
Oil Capacity (qt.)18–20oz.
Lubrication SystemSplash
Low Oil AlertNo
Low Oil ShutdownNo
Ignition SystemElectronic
Governor SystemMechanical
CarburetorFloat
Throttle ControlRemote or manual friction
Max. RPM3,100
Charging System AmpsNo
Muffler IncludedYes
Flywheel BrakeYes
Auto Compression ReleaseYes
Bolt Circle (in.)8
Dimensions L x W x H (in.)15.4 x 13 x 10
EPA/CARB Approval (California Air Resource Board)Yes

What's Included

  • (1) Engine

Manufacturer Warranty

2 years consumer use / 1 year commercial use

Additional Information

Engine Specs (pdf)
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Service Protection Plus

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

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DESCRIPTION (Click More Info for details) 1 Year Extension 2 Year Extension
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Briggs & Stratton 850 Professional-Series Commercial Replacement Push Mower Engine — 190cc, 7/8in. x 3 5/32in. Shaft, Model# 121Q72-2020-F1 The price is $289.99.
Briggs & Stratton 850 Professional-Series Commercial Replacement Push Mower Engine — 190cc, 7/8in. x 3 5/32in. Shaft, Model# 121Q72-2020-F1
NOT YET RATED   (Not Yet Rated - New)
Item# 172794
Only $289.99
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Hide Similarities
Engine Displacement (cc) 190 190 190 190 190
Start Type Recoil Recoil Recoil Recoil Recoil
Application Walk mower Walk mower Toro lawn mower Walk mower Push mower
Engine Type 675 Series 675 Series 675 Series Professional 875 Series OHV 850 Professional-series
Rated Power (HP) Manufacturer no longer rates this engine by HP Manufacturer no longer rates this engine by HP Manufacturer no longer rates this engine by HP Manufacturer no longer rates this engine by HP -
Torque (ft./lbs.) 6.75 6.75 6.75 8.75 8.5
Shaft Output Vertical Vertical Vertical Vertical Vertical
Crankshaft - - - - 7/8 in. x 3 5/32in.
Shaft Diameter (in.) 7/8 63/64 (25mm) 63/64 (25mm) 7/8 7/8
Shaft Length (in.) 3 5/32 3 5/32 3 5/32 3 5/32 3 5/32
Shaft Keyway (in.) 3/16 3/16 and 2 woodruff key slots 3/16 3/16 and 2 woodruff key slots (2) Woodruff keys and 3/16-in. shaft keyway
Shaft End Tapped (Diameter (in.)/Threads per inch) 3/8–24 3/8–24 7/16–20 3/8–24 3/8/24
Shaft Rotation (From PTO Shaft Side) Counterclockwise Counterclockwise Counterclockwise Counterclockwise CCW
Gear Reduction - - - - No
Bearing Type Plain Plain Plain Plain Ball on PTO end, DU on flywheel
Cylinders (qty.) 1 1 1 1 1
Cylinder Bore Aluminum alloy Aluminum alloy Aluminum alloy Aluminum alloy Cast iron
Bore x Stroke (in.) 2.69 x 2.04 2.69 x 2.04 2.69 x 2.04 2.69 x 2.04 2.69 x 2.04
Cooling System Air cooled Air cooled Air cooled Air cooled Air
Air Cleaner Type Automotive type pleated paper Automotive type pleated paper Dual element Commercial-grade w/dual seal Commercial-grade w/dual seal
Fuel Tank Yes Yes Yes Yes Yes
Fuel Type Gasoline Gasoline Gasoline Gasoline Gasoline
Fuel Tank Capacity (qt.) 1.6 1.6 1.6 1.6 1.6
Fuel Pump - - - - No
Fuel Filter - - - - No
Oil Capacity (qt.) 0.56–0.63 (18-20 oz.) 0.56–0.63 (18-20 oz.) 0.56–0.63 (18–20 oz.) 0.56–0.63 (18–20 oz.) 18–20oz.
Lubrication System Splash Splash Splash Splash Splash
Low Oil Alert No No - - No
Low Oil Shutdown - - - - No
Ignition System Electronic Electronic Electronic Electronic Electronic
Governor System Mechanical Mechanical Mechanical Mechanical Mechanical
Carburetor Float Float Float Float Float
Throttle Control Manual friction, remote Manual friction Manual friction, remote Manual friction, remote Remote or manual friction
Max. RPM 3,100 3,100 3,100 3,100 3,100
Charging System Amps - - - - No
Muffler Included Yes Yes Yes Yes Yes
Flywheel Brake - Yes - Yes Yes
Auto Compression Release Yes Yes Yes Yes Yes
Bolt Circle (in.) 8 8 8 8 8
Dimensions L x W x H (in.) 13 x 11 1/2 x 9 3/4 13 x 11 1/2 x 9 3/4 13 x 11 1/2 x 9 3/4 15 3/8 x 13 3/4 x 10 15.4 x 13 x 10
EPA/CARB Approval (California Air Resource Board) No Yes Yes Yes Yes

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