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Briggs & Stratton Powerbuilt OHV Vertical Engine — 500cc, 1in. x 3 5/32in. Shaft, Electric Start with Recoil Backup, Model# 31R907-0006-G1

Item# 42551
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Briggs & Stratton Powerbuilt OHV Vertical Engine —  500cc, 1in. x 3 5/32in. Shaft, Electric Start with Recoil Backup, Model# 31R907-0006-G1

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Was $519.99
Sale $489.99

Save $30.00

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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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Factory Shipped —
Estimated Delivery: 4 - 6 Business Days
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Not Available in Stores
 

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/recoil backup

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# 42551
Brand Briggs & Stratton
Manufacturer's Warranty 2 years consumer use / 1 year commercial use
Ship Weight 88.0 lbs
Engine Displacement (cc) 500
Start Type Electric w/recoil backup
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 No
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

Customer Reviews

Product Question + Answer
Accessories Frequently Purchased with this Item
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 with Recoil Backup, Model# 31R907-0006-G1 The price is $489.99.
Briggs & Stratton Powerbuilt OHV Vertical Engine — 500cc, 1in. x 3 5/32in. Shaft, Electric Start with Recoil Backup, Model# 31R907-0006-G1
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Hide Similarities
Engine Displacement (cc)
344 344 500 344 344
Start Type
Electric w/recoil backup Recoil Electric w/recoil backup Electric Electric
Application Riding mower Riding mower Riding mower, lawn tractor, trail mower Riding mower Riding mower
Engine Type Intek Intek OHV Intek Intek OHV Intek OHV
Shaft Output
Vertical Vertical Vertical Vertical Vertical
Crankshaft 1 x 3 5/32 1 x 3 5/32 1 x 3 5/32 1 x 3 5/32 1 x 3 5/32
Shaft Diameter (in.) 3 5/32 1 1 1 1
Shaft Length (in.) 1 3 5/32 3 5/32 3 5/32 3 5/32
Shaft Keyway (in.)
1/4 1/4 1/4 1/4 1/4
Shaft End Tapped (Diameter (in.)/Threads per inch) 7/16-20 7/16-20 7/16-20 7/16-20 7/16-20
Shaft Rotation (From PTO Shaft Side) Counterclockwise Counterclockwise CCW Counterclockwise Counterclockwise
Gear Reduction
No No No No No
Bearing Type
Plain Plain Plain Plain Plain
Cylinders (qty.)
1 1 1 1 1
Cylinder Bore
Cast iron Cast iron sleeve Cast iron Cast iron Cast iron sleeve
Bore x Stroke (in.)
3.44 x 2.26 3.44 x 2.26 3.56 x 3.06 3.44 x 2.26 3.44 x 2.26
Compression Ratio
8.5:1 8.5:1 8.5:1 8.5:1 8.5:1
Cooling System
Air cooled Air cooled Air cooled Air cooled Air cooled
Air Cleaner Type
Dual element Cartridge style Dual element Cartridge style Cartridge style
Fuel Tank Not included Not included Not included Not included Not included
Fuel Type Gasoline Gasoline Gasoline Gasoline Gasoline
Fuel Pump
Yes No No No Yes
Fuel Filter
Yes Yes No Yes Yes
Oil Capacity (qt.)
1 1/2 1.5 1 1/2 1.5 1.5
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
Remote Remote Remote Remote Remote
Choke Control
Manual Manual Manual Manual Manual
Max. RPM
3,300 3,600 3,300 3,600 3,600
Charging System Amps 3A DC, 14V AC - 9 3A DC, 14V AC 3A DC, 14V AC
Muffler Included
Yes Yes Yes Yes Yes
Flywheel Brake No - No - -
Auto Compression Release
Yes Yes Yes Yes Yes
Bolt Circle (in.)
10 10 10 10 10
Dimensions L x W x H (in.)
17 1/2 x 16 1/2 x 12 17 x 17 x 16 1/2 19 x 16 x 13 17 x 17 x 16 1/2 17 x 17 x 16 1/2
EPA/CARB Approval (California Air Resource Board)
Yes Yes Yes Yes Yes