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Briggs & Stratton Intek Vertical OHV Engine with Electric Start — 540cc, 1in. x 3 5/32in. Shaft, Model# 33R877-0003-G1

Item# 44651
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Briggs & Stratton Intek Vertical OHV Engine with Electric Start — 540cc, 1in. x 3 5/32in. Shaft, Model# 33R877-0003-G1

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Only $569.99
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  • Advanced debris management system with dual-sealing cartridge-style air filter for maximum protection and extended engine life
  • AVS® antivibration system eliminates side-to-side motion of a traditional counter and rotating balance system
  • Easy-to-use automotive-style dipstick
  • Dura-Bore™ cast iron cylinder sleeve stands up to wear and abuse while providing improved oil control
  • Dura-Lube™ gear-driven splash lubrication system continuously supplies oil to all internal parts
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Product Summary

Briggs & Stratton Briggs & Stratton Intek Vertical OHV Engine with Electric Start delivers top reliability, performance and durability to meet the demands of professionals. The OHV engine features a pressure lubrication system with an automotive full-flow style spin-on oil filter that cleans contaminants from the oil.

What's Included
  •  (1) Engine

Features + Benefits

  • Advanced debris management system with dual-sealing cartridge-style air filter for maximum protection and extended engine life
  • AVS® antivibration system eliminates side-to-side motion of a traditional counter and rotating balance system
  • Easy-to-use automotive-style dipstick
  • Dura-Bore™ cast iron cylinder sleeve stands up to wear and abuse while providing improved oil control
  • Dura-Lube™ gear-driven splash lubrication system continuously supplies oil to all internal parts
  • Heavy-duty Teflon®-coated bronze sleeve bearing reduces wear and withstands twice the belt load of standard bearings
  • High-volume cooling fan keeps the engine running cooler
  • Magnetron® electronic ignition for quick, dependable parts
  • OHV design for high fuel efficiency and long engine life
  • Pressure lubrication system with spin-on oil filter for controlled clean oil flow to lower bearings to decrease wear
  • Easy-access tool-less air cleaner cover
Key Specs
Item# 44651
Brand Briggs & Stratton
Manufacturer's Warranty 24 months parts / 24 months labor
Ship Weight 77.0 lbs
Engine Displacement (cc) 540
Start Type Electric
Application Riding mower
Engine Type Intek OHV
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) Counterclockwise
Gear Reduction No
Bearing Type Plain
Cylinders (qty.) 1
Cylinder Bore Cast iron sleeve
Bore x Stroke (in.) 3.70 x 3.06
Compression Ratio 8.5:1
Cooling System Air cooled
Air Cleaner Type Cartridge style dual element
Fuel Tank Not included
Fuel Type Gasoline
Fuel Pump Yes
Fuel Filter Yes
Oil Capacity (qt.) 1.5
Lubrication System Full pressure
Low Oil Alert No
Low Oil Shutdown No
Ignition System Electronic
Governor System Mechanical
Carburetor Float
Throttle Control Remote
Choke Control Manual
Max. RPM 3,600
Charging System Amps 9
Muffler Included No
Auto Compression Release Yes
Bolt Circle (in.) 10
Dimensions L x W x H (in.) 19 x 16 1/2 x 16 1/2
EPA/CARB Approval (California Air Resource Board) Yes

Customer Reviews

Product Question + Answer
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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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3.9 / 5 (19)
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Briggs & Stratton Intek Vertical OHV Engine with Electric Start — 540cc, 1in. x 3 5/32in. Shaft, Model# 33R877-0003-G1 The price is $569.99.
Briggs & Stratton Intek Vertical OHV Engine with Electric Start — 540cc, 1in. x 3 5/32in. Shaft, Model# 33R877-0003-G1
4.8 / 5 (13)
Item# 44651
In Stock Online
Only $569.99
5 / 5 (1)
Item# 70181
Factory Shipped —
Estimated Delivery: 4 - 6 Business Days
Only $1249.99
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