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Briggs & Stratton Pro-Series Push Mower Engine — 190cc, 25mm x 3 5/32in. Shaft, Model# 121S02-2025-F1

Item# 172791
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Briggs & Stratton Pro-Series Push Mower Engine — 190cc, 25mm x 3 5/32in. Shaft, Model# 121S02-2025-F1

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Only $299.99
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  • ReadyStart recoil ignition starts with no prime or choke
  • Certified to CARB Tier III
  • Meets EPA 2012 phase 3 standards
Factory Shipped —
Estimated Delivery: 4 - 6 Business Days
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Not Available in Stores
 

Product Summary

The Briggs & Stratton Pro-Series™ OHV engines were designed to provide an experience that combines power, performance, features and size. This engine offers consumers and professionals commercial-grade features including easier starting, smooth and quiet operation, increased durability and longer life. U.S.A.

What's Included
  • (1) Engine, Model# 121S02-2025-F1

Features + Benefits

Features for Briggs & Stratton Pro-Series Push Mower Engine — 190cc, 25mm x 3 5/32in. Shaft, Model# 121S02-2025-F1
  • ReadyStart recoil ignition starts with no prime or choke
  • Certified to CARB Tier III
  • Meets EPA 2012 phase 3 standards
Key Specs
Item# 172791
Brand Briggs & Stratton
Manufacturer's Warranty 24 months consumer / 90 day commercial
Ship Weight 29.0 lbs
Engine Displacement (cc) 190
Start Type Recoil
Application Walk-behind mower
Engine Type Professional 875 Series OHV
Torque (ft./lbs.) 8.75
Shaft Output Vertical
Shaft Diameter (in.) 25 mm
Shaft Length (in.) 3 5/32
Shaft Keyway (in.) (2) Woodruff keys and 3/16-in. straight keyway
Shaft End Tapped (Diameter (in.)/Threads per inch) 3/8–24
Shaft Rotation (From PTO Shaft Side) Counterclockwise
Bearing Type Plain
Cylinders (qty.) 1
Cylinder Bore Aluminum alloy
Bore x Stroke (in.) 2.69 x 2.04
Cooling System Air cooled
Air Cleaner Type Commercial-grade w/dual seal
Fuel Tank Yes
Fuel Type Gasoline
Fuel Tank Capacity (qt.) 1.6
Oil Capacity (qt.) 0.56–0.63 (18–20 oz.)
Lubrication System Splash
Ignition System Electronic
Governor System Mechanical
Carburetor Float
Throttle Control Manual friction, remote
Max. RPM 3,100
Muffler Included Yes
Flywheel Brake Yes
Auto Compression Release Yes
Bolt Circle (in.) 8
Dimensions L x W x H (in.) 15 3/8 x 13 3/4 x 10
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 Pro-Series Push Mower Engine — 190cc, 25mm x 3 5/32in. Shaft, Model# 121S02-2025-F1 The price is $299.99.
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Hide Similarities
Engine Displacement (cc)
163 190 190 190 190
Start Type
ReadyStart, rewind Recoil Recoil Recoil Recoil
Application Walk-behind rotary mower engine Walk-behind mower Walk-behind mower Walk-behind mower Walk-behind mower
Engine Type Gasoline, single-cylinder 4-cycle 850 Professional-series 675 series Professional 875 Series OHV Professional 875 Series OHV
Torque (ft./lbs.)
7.25 8.5 6.75 8.75 8.75
Shaft Output
Vertical Vertical Vertical Vertical Vertical
Crankshaft Vertical 25mm x 3 5/32in. - - 7/8i n. dia x 1 13/16
Shaft Diameter (in.) 7/8 25mm 7/8 25 mm 7/8
Shaft Length (in.) 3 5/32 3 5/32 1 13/16 3 5/32 1 13/16
Shaft Keyway (in.)
3/16 square (2) Woodruff keys and 3/16-in. shaft keyway 3/16 (2) Woodruff keys and 3/16-in. straight keyway (2) Woodruff key, 3/16-in. keyway
Shaft End Tapped (Diameter (in.)/Threads per inch) 3/8–24 3/8/24 3/8–24 3/8–24 3/8/24
Shaft Rotation (From PTO Shaft Side) CCW CCW Counterclockwise Counterclockwise CCW
Gear Reduction No No - - -
Bearing Type
- Ball on PTO end, DU on flywheel Plain Plain Plain
Cylinders (qty.)
1 1 1 1 1
Cylinder Bore
Aluminum Cast iron Aluminum alloy Aluminum alloy Aluminum
Bore x Stroke (in.)
2.69 x 1.75 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 Air cooled Air cooled Splash
Air Cleaner Type
Paper cartridge Commercial-grade w/dual seal Automotive style paper filter Commercial-grade w/dual seal Commercial-grade w/dual seal
Fuel Tank 1.09 Yes Yes Yes Yes
Fuel Type Regular gasoline Gasoline Gasoline Gasoline Gasoline
Fuel Tank Capacity (qt.)
1.09 1.6 1.6 1.6 1.6
Fuel Pump
- No - - No
Fuel Filter
No No - - Yes
Oil Capacity (qt.)
15 18–20 oz. 0.56–0.63 (18–20 oz.) 0.56–0.63 (18–20 oz.) 5/8
Lubrication System
Dura Lube splash Splash Splash Splash Splash
Low Oil Alert
No No No - No
Low Oil Shutdown
No No - - No
Ignition System
Magnetron Electronic Electronic Electronic Electronic
Governor System
Mechanical Mechanical Mechanical Mechanical Mechanical
Carburetor
Float type Float Float Float Float
Throttle Control
Fixed speed Remote or manual friction Manual friction, remote Manual friction, remote Manual friction, remote
Choke Control
No - - - No choke
Max. RPM
3,200 3,100 3,100 3,100 3,800
Charging System Amps None No - - -
Muffler Included
Yes Yes Yes Yes Yes
Flywheel Brake
CPSC blade brake Yes 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.)
16 x 12 1/2 x 13 15.4 x 13 x 10 13 x 11 1/2 x 9 3/4 15 3/8 x 13 3/4 x 10 12 1/4 x 12 1/4 x 13 1/2
EPA/CARB Approval (California Air Resource Board)
Yes Yes - Yes Yes
Product Weight (lbs.) 24 - - - -