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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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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.
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Engine Displacement (cc)
674 674 725 725 999
Start Type
Electric Electric Electric Electric Electric
Application Garden tractor, zero-turn mower, sand trap rake, utility vehicle Zero-turn mower, UTV, garden tractor Stump grinders, construction equipment, grain augers Exmark ZTR mowers Construction, log splitter, chipper/shredder, mower
Engine Type Gasoline Gasoline Gasoline Horizontal Command Pro OHV
Net Power Output (HP) - - - - 35
Torque (ft./lbs.)
35 (47.5 Nm) at 3,600 RPM 35.7 (48.4 Nm) at 3,600 RPM 38.4 (52.1 Nm) at 3,600 RPM 38.4 (52.1 Nm) at 3,600 RPM 54.5
Displacement (cu. in.)
41 41.1 725 44 999
Shaft Output
Horizontal Horizontal CCW CCW CCW
Crankshaft Hardened 1.437 in. x 4.453in. Hardened Hardened Hardened
Shaft Diameter (in.) 1 1.437 1.437 1 1/8 1.437
Shaft Length (in.) 3 4.453 4.453 2 3/4 4.46
Shaft Keyway (in.)
3/8 0.0375 0.375 0.250 0.375
Shaft End Tapped (Diameter (in.)/Threads per inch) 1 x 3/8-24 UNF 1 1/2 deep x 5/8 UNF 5/8–18 UNF 7/16-20 unf Drilled/tapped, 1.5 Deep x 5/8-18 UNF
Shaft Rotation (From PTO Shaft Side) CCW Counterclockwise CCW CCW CCW
PTO Height (in.) 6 1/8 6 1/8 6.125 6 1/8 -
Bearing Type
No Parent material Sleeve - Heavy-duty
Cylinders (qty.)
2 2 2 2 2
Cylinder Bore
Cast iron Cast iron sleeve Cast iron liner Cast iron Cast iron sleeve
Bore x Stroke (in.)
3 x 2.6 3 x 2.6 3.3 x 2.6 - 3.5 x 3.1
Compression Ratio
8.5:1 8.5:1 9:1 9:1 8.8:1
Cooling System
Air cooled Air cooled Air Air Air
Air Cleaner Type
Dual element Dual element Dual element Heavy-duty canister Canister type
Fuel Type Gasoline Gasoline Gasoline Gas Gasoline
Fuel Pump
Mechanical Mechanical Mechanical Mechanical Mechanical
Fuel Filter
In line In line Yes Yes Large capacity in-line
Oil Capacity (qt.)
2 2 2 2 2
Lubrication System
Full-pressure lubrication w/full-flow filter Full pressure Full pressure Full pressure Full pressure lubrication
Low Oil Alert
Oil Sentry, shipped disconnected Yes Yes Yes Oil sentry, installed/wired, not connected
Low Oil Shutdown
Yes Yes, wired not connected Yes Yes Yes, Oil sentry, installed/wired, not connected
Ignition System
Electronic Electronic Electronic Electronic Electronic
Governor System
Variable speed Variable speed Mechanical Mechanical Variable speed
Carburetor
Smart Choke Smart Choke Smart choke Smart choke Smart choke
Throttle Control
Remote Remote Engine mounted w/keyswitch Remote Remote
Choke Control
Remote Remote Engine mounted w/keyswitch Remote Smart choke
Max. RPM
3,600 3,600 3,600 3,600 3,600
Charging System Amps 15 20 20A regulated 20 25A alternator, regulated
Muffler Included
No - No Yes No
Flywheel Brake No - - - -
Auto Compression Release
No No - - Yes
Bolt Circle (in.) 5, 6 1/2, 7 3/4; 5 3/4 pilot 5 5/8, 7 3/4; 7 pilot 5.625 and 7.75, 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 1/4 x 3 1/2 7.250 x 3.504 7 1/4 x 3 1/2 5 5/8, 7 3/4, 7in. pilot
Mounting Bolt Pattern L x W (in.) 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 5 5/8, 7 3/4
Dimensions L x W x H (in.)
14 x 17 7/10 x 19 14 x 17 7/10 x 26 14 x 17 3/4 x 19 14 x 17 3/4 x 26 1/2 15.3 x 19 x 27.5
EPA/CARB Approval (California Air Resource Board)
Yes Yes Yes Yes Yes
Product Weight (lbs.) - - - - 132