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Kohler Command V-Twin OHV Horizontal Engine with Electric Start — 674cc, 1.437in. x 4.453in. Shaft, Model# PA-CH640-3204

Item# 44603
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Kohler Command V-Twin OHV Horizontal Engine with Electric Start — 674cc, 1.437in. x 4.453in. Shaft, Model# PA-CH640-3204

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Only $1399.99
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  • 7in. dia. pilot, 5 5/8in. and 7 3/4in. bolt circles
  • OHV design
  • Cast iron cylinder liners
  • Hydraulic valve lifters
  • Full-pressure lube with spin-on oil filter
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Factory Shipped —
Estimated Delivery: 5 - 7 Business Days
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Product Summary

This Kohler 674cc Command V-Twin Horizontal Engine is a 4-cycle gasoline-driven engine that opened the door to new design and technology for spark-ignited utility engines. This engine goes beyond just horsepower and torque to become the standard in the utility engine industry. Utilizes a full-flow oil filter to offer hassle-free maintenance that includes 100-hour oil changes and 200-hour filter changes.

What's Included
  •  (1) Engine

Features + Benefits

  • 7in. dia. pilot, 5 5/8in. and 7 3/4in. bolt circles
  • OHV design
  • Cast iron cylinder liners
  • Hydraulic valve lifters
  • Full-pressure lube with spin-on oil filter
  • Dual-element air cleaner
  • Mechanical fuel pump
  • Remote controls
  • Oil Sentry®, shipped disconnected
  • 50-state compliant engine
Key Specs
Item# 44603
Brand Kohler Engines
Manufacturer's Warranty 3 Yr Consumer Limited
Ship Weight 110.0 lbs
Engine Displacement (cc) 674
Start Type Electric
Application Zero-turn mower, UTV, garden tractor
Engine Type Gasoline
Torque (ft./lbs.) 35.7 (48.4 Nm) at 3,600 RPM
Displacement (cu. in.) 41.1
Shaft Output Horizontal
Crankshaft 1.437 in. x 4.453in.
Shaft Diameter (in.) 1.437
Shaft Length (in.) 4.453
Shaft Keyway (in.) 0.0375
Shaft End Tapped (Diameter (in.)/Threads per inch) 1 1/2 deep x 5/8 UNF
Shaft Rotation (From PTO Shaft Side) Counterclockwise
PTO Height (in.) 6 1/8
Bearing Type Parent material
Cylinders (qty.) 2
Cylinder Bore Cast iron sleeve
Bore x Stroke (in.) 3 x 2.6
Compression Ratio 8.5:1
Cooling System Air cooled
Air Cleaner Type Dual element
Fuel Type Gasoline
Fuel Pump Mechanical
Fuel Filter In line
Oil Capacity (qt.) 2
Lubrication System Full pressure
Low Oil Alert Yes
Low Oil Shutdown Yes, wired not connected
Ignition System Electronic
Governor System Variable speed
Carburetor Smart Choke
Throttle Control Remote
Choke Control Remote
Max. RPM 3,600
Charging System Amps 20
Auto Compression Release No
Bolt Circle (in.) 5 5/8, 7 3/4; 7 pilot
Mounting Base L x W (in.) 7 1/4 x 3 1/2
Mounting Bolt Pattern L x W (in.) 7 1/4 x 3 1/2
Dimensions L x W x H (in.) 14 x 17 7/10 x 26
EPA/CARB Approval (California Air Resource Board) Yes

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

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Sat 7:00 AM - 3:00 PM (Central)

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Kohler Command V-Twin OHV Horizontal Engine with Electric Start — 674cc, 1.437in. x 4.453in. Shaft, Model# PA-CH640-3204 The price is $1,399.99.
Kohler Command V-Twin OHV Horizontal Engine with Electric Start — 674cc, 1.437in. x 4.453in. Shaft, Model# PA-CH640-3204
(Not Yet Rated - New)
Item# 44603
Factory Shipped —
Estimated Delivery: 5 - 7 Business Days
Only $1399.99
Hide Similarities
Engine Displacement (cc)
674 674 674 725 674
Start Type
Electric Electric Electric Electric Electric
Application Garden tractor, zero-turn mower, skid steer loader, bale chopper, utility vehicle Utility vehicle, sand trap rake, grain auger, boring equipment, carpet cleaning machines, pressure washers and furnace vacs Zero-turn mower, UTV, garden tractor Toro Exmark ZTR Grasshopper zero-turn mower
Engine Type Command V-Twin OHV Gasoline Gasoline Air cooled Command Pro OHV
Torque (ft./lbs.)
35 (47.5 Nm) at 3,600 RPM 35 (47.5 Nm) at 3,600 RPM 35.7 (48.4 Nm) at 3,600 RPM 39.2 (53.1 Nm) at 3,600 RPM 35.7 (48.4 Nm) at 3,600 RPM
Displacement (cu. in.)
41 - 41.1 725 41
Shaft Output
Horizontal Counterclockwise Horizontal CCW Horizontal
Crankshaft Hardened Hardened 1.437 in. x 4.453in. Hardened Hardened
Shaft Diameter (in.) 1 1/8 1 1/8 1.437 1 1/8 1 1/8
Shaft Length (in.) 4 4 4.453 2 3/4 3 11/32
Shaft Keyway (in.)
1/4 1/4 0.0375 0.25 1/4
Shaft End Tapped (Diameter (in.)/Threads per inch) 1.5-in. deep 7/16-20 UNF 7/16–20 UNF 1 1/2 deep x 5/8 UNF 7/16–20 UNF 17/16-20 UNF
Shaft Rotation (From PTO Shaft Side) Counterclockwise Counterclockwise Counterclockwise CCW Counterclockwise
PTO Height (in.)
6 1/8 6 1/8 6 1/8 6.125 6 1/8
Bearing Type
Parent material Parent material Parent material - Parent material
Cylinders (qty.)
2 2 2 2 2
Cylinder Bore
Cast iron Cast iron sleeve Cast iron sleeve Cast iron liner Cast iron sleeve
Bore x Stroke (in.)
3.1 x 2.6 3 x 2.6 3 x 2.6 3.3 x 2.6 3 x 2.6
Compression Ratio
8.5:1 8.5:1 8.5:1 9:1 8.5:1
Cooling System
Air cooled Air cooled Air cooled Air Air cooled
Air Cleaner Type
Dual element Dual element Dual element Canister Dual element
Fuel Type Gasoline Gasoline Gasoline Gasoline Gasoline
Fuel Pump
Mechanical Mechanical Mechanical Mechanical Mechanical
Fuel Filter
Large capacity in-line Large capacity In line Yes In line
Oil Capacity (qt.)
2 2 2 2 2
Lubrication System
Full pressure Full pressure Full pressure Full pressure Full pressure
Low Oil Alert
Yes Yes Yes Yes Yes
Low Oil Shutdown
Oil Sentry, shipped disconnected Oil Sentry, shipped disconnected Yes, wired not connected Yes Yes
Ignition System
Electronic Electronic Electronic Electronic Electronic
Governor System
Variable speed Variable speed Variable speed Mechanical Mechanical
Carburetor
Smart Choke Smart Choke Smart Choke Smart choke Smart choke
Throttle Control
Remote Engine mounted Remote Remote Remote
Choke Control
Remote Smart Choke Remote Remote Remote
Max. RPM
3,600 3,600 3,600 3,600 3,600
Charging System Amps 15 15 20 20A regulated 15
Muffler Included
No No - No Yes
Auto Compression Release
No No No - No
Bolt Circle (in.)
5 5/8, 7 3/4, 7 pilot 5 5/8, 7 3/4, 7 pilot 5 5/8, 7 3/4; 7 pilot 5.625 and 7.75, 7 in. pilot 5 5/8, 7 3/4, 7 pilot
Mounting Base L x W (in.)
7 1/4 x 3 1/2 7 1/4 x 3 1/2 7 1/4 x 3 1/2 7.250 x 3.504 7 1/4 x 3 1/2
Mounting Bolt Pattern L x W (in.) 7 1/4 x 3 1/2 5 5/8, 7 3/4; 7 pilot 7 1/4 x 3 1/2 - 7 1/4 x 3 1/2
Dimensions L x W x H (in.)
14 x 17 7/10 x 19 14 x 17 7/10 x 19 14 x 17 7/10 x 26 14 x 17 x 26 1/2 14 x 17 7/10 x 19
EPA/CARB Approval (California Air Resource Board)
Yes Yes Yes Yes Yes