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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

Customer Reviews

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
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Hide Similarities
Engine Displacement (cc)
674 725 674 747 725
Start Type
Electric Electric Electric Electric Electric
Application Zero-turn mower, UTV, garden tractor Toro Exmark ZTR Simplicity garden tractor Garden tractors, construction equipment, etc. Exmark ZTR mowers
Engine Type Gasoline Air cooled Gasoline Air Horizontal
Torque (ft./lbs.)
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 41.2 (55.9 Nm) at 3,600 RPM 38.4 (52.1 Nm) at 3,600 RPM
Displacement (cu. in.)
41.1 725 41 45 1/2 44
Shaft Output
Horizontal CCW Horizontal CCW CCW
Crankshaft 1.437 in. x 4.453in. Hardened Hardened Hardened Hardened
Shaft Diameter (in.) 1.437 1 1/8 1 1/8 1 7/16 1 1/8
Shaft Length (in.) 4.453 2 3/4 2.79 4 29/64 2 3/4
Shaft Keyway (in.)
0.0375 0.25 1/4 3/8 0.250
Shaft End Tapped (Diameter (in.)/Threads per inch) 1 1/2 deep x 5/8 UNF 7/16–20 UNF 1 1/2 deep x 7/16-20 UNF 5/8–18 UNF 7/16-20 unf
Shaft Rotation (From PTO Shaft Side) Counterclockwise CCW Counterclockwise CCW CCW
PTO Height (in.)
6 1/8 6.125 6 1/8 6 1/8 6 1/8
Bearing Type Parent material - Parent material PTO sleeve bearing -
Cylinders (qty.)
2 2 2 2 2
Cylinder Bore
Cast iron sleeve Cast iron liner Cast iron sleeve Cast iron Cast iron
Bore x Stroke (in.) 3 x 2.6 3.3 x 2.6 3 x 2.6 3.3 x 2.7 -
Compression Ratio
8.5:1 9:1 8.5:1 9.4 : 1 9:1
Cooling System
Air cooled Air Air cooled Air Air
Air Cleaner Type
Dual element Canister Dual element Dual element Heavy-duty canister
Fuel Type Gasoline Gasoline Gasoline Gas Gas
Fuel Pump
Mechanical Mechanical Mechanical Mechanical Mechanical
Fuel Filter
In line Yes Spin-on Yes Yes
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
Yes, wired not connected Yes Oil Sentry, shipped disconnected Yes Yes
Ignition System
Electronic Electronic Electronic Electronic Electronic
Governor System
Variable speed Mechanical Variable speed Mechanical Mechanical
Carburetor
Smart Choke Smart choke Smart Choke Smart choke Smart choke
Throttle Control
Remote Remote Remote Remote Remote
Choke Control
Remote Remote Remote Remote Remote
Max. RPM
3,600 3,600 3,600 3,600 3,600
Charging System Amps 20 20A regulated 15 25 20
Muffler Included
- No No - Yes
Auto Compression Release No - No - -
Bolt Circle (in.)
5 5/8, 7 3/4; 7 pilot 5.625 and 7.75, 7 in. pilot 5 5/8, 7 3/4; 7 pilot 5 5/8 and 7 3/4, 7 in. pilot 5 5/8 and 7 3/4, 7 in. pilot
Mounting Base L x W (in.)
7 1/4 x 3 1/2 7.250 x 3.504 7 1/4 x 3 1/2 7 1/4 x 3.504 7 1/4 x 3 1/2
Mounting Bolt Pattern 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
Dimensions L x W x H (in.)
14 x 17 7/10 x 26 14 x 17 x 26 1/2 14 x 18 x 19 14 x 17.7 x 22.4 14 x 17 3/4 x 26 1/2
EPA/CARB Approval (California Air Resource Board)
Yes Yes Yes Yes Yes