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Briggs & Stratton Intek Vertical OHV Engine — 344cc, 1in. x 3 5/32in. Shaft, Model# 21R702-0087-G1

Item# 44647
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Briggs & Stratton Intek Vertical OHV Engine — 344cc, 1in. x 3 5/32in. Shaft, Model# 21R702-0087-G1

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Was $479.99
Sale $454.99

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  • Dura-Bore™ cast iron cylinder sleeve provides improved oil control for extended engine life
  • AVS® anti-vibration system eliminates side-to-side motion of traditional counter and rotating balance designs to provide a smooth ride, less wear and tear and extended equipment life
  • Float carburetor for consistent easy starting
  • Maintenance-free Magnetron electronic ignition for quick, dependable starts
  • Rewind start
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Factory Shipped —
Estimated Delivery: 4 - 6 Business Days
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Product Summary

This Briggs & Stratton Intek Vertical OHV Engine delivers excellent reliability with superior performance and durability. This powerful engine has a heavy-duty Teflon-coated bronze sleeve bearing, an automotive-style dipstick and an anti-vibration system. Designed for riding lawn mowers.

What's Included
  •  (1) Engine
pdf Product Manual

Features + Benefits

  • Dura-Bore™ cast iron cylinder sleeve provides improved oil control for extended engine life
  • AVS® anti-vibration system eliminates side-to-side motion of traditional counter and rotating balance designs to provide a smooth ride, less wear and tear and extended equipment life
  • Float carburetor for consistent easy starting
  • Maintenance-free Magnetron electronic ignition for quick, dependable starts
  • Rewind start
  • Dual-sealing cartridge-style air filter provides maximum protection and extends engine life
  • Automotive-style dipstick for simple oil level checks
  • DuraLube™ gear-driven splash lubrication system continuously supplies oil to all internal parts
  • Teflon-coated bronze sleeve bearing withstands twice the belt load of a standard bearing and reduces wear
  • High-volume cooling fan extends engine life through cooler operating temperatures
  • OHV design runs cooler and cleaner for long life and improved fuel economy
Key Specs
Item# 44647
Brand Briggs & Stratton
Manufacturer's Warranty 24 months parts / 24 months labor
Ship Weight 68.0 lbs
Engine Displacement (cc) 344
Start Type Recoil
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.) 3.44 x 2.26
Compression Ratio 8.5:1
Cooling System Air cooled
Air Cleaner Type Cartridge style
Fuel Tank Not included
Fuel Type Gasoline
Fuel Pump No
Fuel Filter Yes
Oil Capacity (qt.) 1.5
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 3,600
Muffler Included Yes
Auto Compression Release Yes
Bolt Circle (in.) 10
Dimensions L x W x H (in.) 17 x 17 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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5 / 5 (1)
Item# 42550
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Estimated Delivery: 4 - 6 Business Days
Only $429.99
Briggs & Stratton Intek Vertical OHV Engine — 344cc, 1in. x 3 5/32in. Shaft, Model# 21R702-0087-G1 The price is $454.99.
Briggs & Stratton Intek Vertical OHV Engine — 344cc, 1in. x 3 5/32in. Shaft, Model# 21R702-0087-G1
4 / 5 (1)
Item# 44647
Factory Shipped —
Estimated Delivery: 4 - 6 Business Days
Was $479.99
Sale $454.99
Save $25.00
(Not Yet Rated - New)
Item# 42551
Factory Shipped —
Estimated Delivery: 4 - 6 Business Days
Was $519.99
Sale $489.99
Save $30.00
(Not Yet Rated - New)
Item# 44650
Factory Shipped —
Estimated Delivery: 4 - 6 Business Days
Was $579.99
Sale $549.99
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4.5 / 5 (2)
Item# 44649
Factory Shipped —
Estimated Delivery: 4 - 6 Business Days
Was $679.99
Sale $639.99
Save $40.00
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

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