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Briggs & Stratton Powerbuilt OHV Vertical Engine — 500cc, 1in. x 3 5/32in. Shaft, Electric Start, Model# 31R907-0007-G1

Item# 42552
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Briggs & Stratton Powerbuilt OHV Vertical Engine — 500cc, 1in. x 3 5/32in. Shaft, Electric Start, Model# 31R907-0007-G1

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Only $499.99
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  • Dura-Bore™ cast iron cylinder sleeve for extended life
  • Maintenance-free Magnetron® electronic ignition and float carburetor for consistent, easy starts
  • Dual-Clean™ dual-element air cleaner for maximum protection
  • Patented balancing system for smoother performance
  • Gear-driven DuraLube™ splash lubrication bathes all internal engine parts with oil
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Product Summary

The Briggs & Stratton Powerbuilt™ 500cc Engine features 12V electric start, rewind backup and a 9 Amp DC alternator. The exhaust manifold and muffler are included but fuel tank is omitted. For use on riding lawn mowers, wide area walk-behind mowers and trail mowers. Emission-compliant engine is for sale in all 50 states.

What's Included
  • (1) Engine with electric start

Features + Benefits

  • Dura-Bore™ cast iron cylinder sleeve for extended life
  • Maintenance-free Magnetron® electronic ignition and float carburetor for consistent, easy starts
  • Dual-Clean™ dual-element air cleaner for maximum protection
  • Patented balancing system for smoother performance
  • Gear-driven DuraLube™ splash lubrication bathes all internal engine parts with oil
  • Tool-less air filter cover for easy access
  • Heavy-duty Teflon sleeve bearing withstands load and reduces wear
  • Automotive dipstick makes checking oil levels easy
Key Specs
Item# 42552
Brand Briggs & Stratton
Manufacturer's Warranty 2 years consumer use / 1 year commercial use
Ship Weight 81.0 lbs
Engine Displacement (cc) 500
Start Type Electric
Application Riding mower, lawn tractor, trail mower
Engine Type Intek
Shaft Output Vertical
Crankshaft 1 x 3 5/32
Shaft Diameter (in.) 1
Shaft Length (in.) 3 5/32
Shaft Keyway (in.) 1/4
Shaft End Tapped (Diameter (in.)/Threads per inch) 7/16-20
Shaft Rotation (From PTO Shaft Side) CCW
Gear Reduction No
Bearing Type Plain
Cylinders (qty.) 1
Cylinder Bore Cast iron
Bore x Stroke (in.) 3.56 x 3.06
Compression Ratio 8.5:1
Cooling System Air cooled
Air Cleaner Type Dual element
Fuel Tank Not included
Fuel Type Gasoline
Fuel Pump No
Fuel Filter Yes
Oil Capacity (qt.) 1 1/2
Lubrication System Splash
Low Oil Alert No
Low Oil Shutdown No
Ignition System Electronic
Governor System Mechanical
Carburetor Float
Throttle Control Remote
Choke Control Manual
Max. RPM 3,300
Charging System Amps 9
Muffler Included Yes
Flywheel Brake No
Auto Compression Release Yes
Bolt Circle (in.) 10
Dimensions L x W x H (in.) 19 x 16 x 13
EPA/CARB Approval (California Air Resource Board) Yes

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Safety
3M Reusable Corded Earplugs — 21dB, Model# 90586-80000
3M Reusable Corded Earplugs — 21dB, Model# 90586-80000
Item# 174630
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Only $2.29
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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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Briggs & Stratton Powerbuilt OHV Vertical Engine — 500cc, 1in. x 3 5/32in. Shaft, Electric Start, Model# 31R907-0007-G1 The price is $499.99.
Briggs & Stratton Powerbuilt OHV Vertical Engine — 500cc, 1in. x 3 5/32in. Shaft, Electric Start, Model# 31R907-0007-G1
3.9 / 5 (19)
Item# 42552
In Stock Online
Only $499.99
4.8 / 5 (13)
Item# 44651
In Stock Online
Was $569.99
Sale $529.99
Save $40.00
5 / 5 (1)
Item# 70181
Factory Shipped —
Estimated Delivery: 4 - 6 Business Days
Was $1249.99
Sale $1179.99
Save $70.00
Hide Similarities
Engine Displacement (cc)
500 540 570  
Start Type
Electric Electric Electric  
Application Riding mower, lawn tractor, trail mower Riding mower Commercial mower, lawn tractor  
Engine Type Intek Intek OHV Vanguard V-Twin OHV  
Shaft Output
Vertical Vertical Vertical  
Crankshaft 1 x 3 5/32 1 x 3 5/32 -  
Shaft Diameter (in.) 1 1 1  
Shaft Length (in.) 3 5/32 3 5/32 3 5/32  
Shaft Keyway (in.)
1/4 1/4 1/4  
Shaft End Tapped (Diameter (in.)/Threads per inch) 7/16-20 7/16-20 7/16–20  
Shaft Rotation (From PTO Shaft Side) CCW Counterclockwise Counterclockwise  
Gear Reduction No No -  
Bearing Type
Plain Plain Plain  
Cylinders (qty.)
1 1 2  
Cylinder Bore
Cast iron Cast iron sleeve Cast iron  
Bore x Stroke (in.)
3.56 x 3.06 3.70 x 3.06 2.83 x 2.76  
Compression Ratio 8.5:1 8.5:1 -  
Cooling System
Air cooled Air cooled Air cooled  
Air Cleaner Type
Dual element Cartridge style dual element Dual element  
Fuel Tank Not included Not included Not included  
Fuel Type Gasoline Gasoline Gasoline  
Fuel Pump
No Yes Yes  
Fuel Filter Yes Yes -  
Oil Capacity (qt.)
1 1/2 1.5 1.5 (48 oz.)  
Lubrication System
Splash Full pressure Full pressure  
Low Oil Alert
No No Yes  
Low Oil Shutdown No No -  
Ignition System
Electronic Electronic Electronic  
Governor System
Mechanical Mechanical Mechanical  
Carburetor
Float Float Float  
Throttle Control
Remote Remote Remote  
Choke Control Manual Manual -  
Max. RPM
3,300 3,600 3,300  
Charging System Amps 9 9 16  
Muffler Included
Yes No No  
Flywheel Brake No - -  
Auto Compression Release
Yes Yes No  
Bolt Circle (in.)
10 10 10  
Dimensions L x W x H (in.)
19 x 16 x 13 19 x 16 1/2 x 16 1/2 16 7/8 x 16 1/16 x 13 1/8  
EPA/CARB Approval (California Air Resource Board)
Yes Yes Yes