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Briggs & Stratton OHV Lawn Mower Engine — 163cc, 7/8in. x 3 5/32in. Shaft, Model# 104M02-0021-F1

Item# 54969
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Briggs & Stratton OHV Lawn Mower Engine  — 163cc, 7/8in. x 3 5/32in. Shaft, Model# 104M02-0021-F1

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Only $169.99
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  •  No prime, no choke easy-pull recoil starts
  •  Maintenance-free Magnetron® electronic ignition for quick, dependable starts
  • Acoustically engineered muffler provides quiet operation and excellent tonal quality
  • Easy-fill angled fuel neck is 2x the size of standard models
  • Dual-sealing air cleaner offers better debris resistance for longer life
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Product Summary

Briggs & Stratton OHV Lawn Mower Engine produces 7.25 ft.-lbs. gross torque for powerful performance. The engine's ReadyStart™ system requires no priming and no choking — just pull and go. For use with walk-behind rotary mowers.

What's Included
  • (1) Engine, Model# 104M02-0021-F1

Features + Benefits

  •  No prime, no choke easy-pull recoil starts
  •  Maintenance-free Magnetron® electronic ignition for quick, dependable starts
  • Acoustically engineered muffler provides quiet operation and excellent tonal quality
  • Easy-fill angled fuel neck is 2x the size of standard models
  • Dual-sealing air cleaner offers better debris resistance for longer life
Key Specs
Item# 54969
Brand Briggs & Stratton
Manufacturer's Warranty 24 months parts / 24 months labor
Ship Weight 24.0 lbs
Engine Displacement (cc) 163
Start Type ReadyStart, rewind
Application Walk-behind rotary mower engine
Engine Type Gasoline, single-cylinder 4-cycle
Torque (ft./lbs.) 7.25
Shaft Output Vertical
Crankshaft Vertical
Shaft Diameter (in.) 7/8
Shaft Length (in.) 3 5/32
Shaft Keyway (in.) 3/16 square
Shaft End Tapped (Diameter (in.)/Threads per inch) 3/8–24
Shaft Rotation (From PTO Shaft Side) CCW
Gear Reduction No
Cylinders (qty.) 1
Cylinder Bore Aluminum
Bore x Stroke (in.) 2.69 x 1.75
Cooling System Air cooled
Air Cleaner Type Paper cartridge
Fuel Tank 1.09
Fuel Type Regular gasoline
Fuel Tank Capacity (qt.) 1.09
Fuel Filter No
Oil Capacity (qt.) 15
Lubrication System Dura Lube splash
Low Oil Alert No
Low Oil Shutdown No
Ignition System Magnetron
Governor System Mechanical
Carburetor Float type
Throttle Control Fixed speed
Choke Control No
Max. RPM 3,200
Charging System Amps None
Muffler Included Yes
Flywheel Brake CPSC blade brake
Auto Compression Release Yes
Bolt Circle (in.) 8
Dimensions L x W x H (in.) 16 x 12 1/2 x 13
EPA/CARB Approval (California Air Resource Board) Yes
Product Weight (lbs.) 24

Customer Reviews

Product Question + Answer
Replacement Parts
Call To Order: 1-800-657-0516

Mon - Fri 7:00 AM - 6:00 PM (Central)
Sat 7:00 AM - 3:00 PM (Central)

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Item# 54969
Briggs & Stratton OHV Lawn Mower Engine  — 163cc, 7/8in. x 3 5/32in. Shaft, Model# 104M02-0021-F1 The price is $169.99.
Briggs & Stratton OHV Lawn Mower Engine — 163cc, 7/8in. x 3 5/32in. Shaft, Model# 104M02-0021-F1
3.8 / 5 (4)
 
Only $169.99
Item# 70507
4 / 5 (6)
 
Only $289.99
Engine Displacement (cc)
163 190  
Start Type
ReadyStart, rewind Recoil  
Application Walk-behind rotary mower engine Walk-behind mower  
Engine Type Gasoline, single-cylinder 4-cycle 675 series  
Torque (ft./lbs.)
7.25 6.75  
Shaft Output
Vertical Vertical  
Crankshaft Vertical -  
Shaft Diameter (in.) 7/8 7/8  
Shaft Length (in.) 3 5/32 1 13/16  
Shaft Keyway (in.)
3/16 square 3/16  
Shaft End Tapped (Diameter (in.)/Threads per inch) 3/8–24 3/8–24  
Shaft Rotation (From PTO Shaft Side) CCW Counterclockwise  
Gear Reduction No -  
Bearing Type
- Plain  
Cylinders (qty.)
1 1  
Cylinder Bore
Aluminum Aluminum alloy  
Bore x Stroke (in.)
2.69 x 1.75 2.69 x 2.04  
Cooling System
Air cooled Air cooled  
Air Cleaner Type
Paper cartridge Automotive style paper filter  
Fuel Tank 1.09 Yes  
Fuel Type Regular gasoline Gasoline  
Fuel Tank Capacity (qt.)
1.09 1.6  
Fuel Filter No -  
Oil Capacity (qt.)
15 0.56–0.63 (18–20 oz.)  
Lubrication System
Dura Lube splash Splash  
Low Oil Alert
No No  
Low Oil Shutdown No -  
Ignition System
Magnetron Electronic  
Governor System
Mechanical Mechanical  
Carburetor
Float type Float  
Throttle Control
Fixed speed Manual friction, remote  
Choke Control No -  
Max. RPM
3,200 3,100  
Charging System Amps None -  
Muffler Included
Yes Yes  
Flywheel Brake
CPSC blade brake Yes  
Auto Compression Release
Yes Yes  
Bolt Circle (in.)
8 8  
Dimensions L x W x H (in.)
16 x 12 1/2 x 13 13 x 11 1/2 x 9 3/4  
EPA/CARB Approval (California Air Resource Board) Yes -  
Product Weight (lbs.) 24 -