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Kohler Command OHV Horizontal Toro/Exmark Zero-Turn Mower Replacement Engine — 725cc, 1 1/8in. x 2 3/4in. Shaft, Model# PA-CH740-3175

Item# 24793
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Kohler Command OHV Horizontal Toro/Exmark Zero-Turn Mower Replacement Engine — 725cc, 1 1/8in. x 2 3/4in. Shaft, Model# PA-CH740-3175

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Only $1699.99
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  • 5 5/8in. and 7 3/4in. bolt circles, 7in. dia. pilot
  • 7 1/4in. x 3 1/2in. mounting base
  • Electric start
  • Full-pressure lube with spin-on oil filter
  • Heavy-duty canister air cleaner system
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Estimated Delivery: 5 - 7 Business Days
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Product Summary

The Kohler 725cc Command OHV Horizontal Engine is a replacement engine for the Toro/Exmark Zero-Turn Mower. The perfect choice when you're looking for fast starts, increased power and unequaled performance.

What's Included
  • (1) Engine
  • (1) Owner's manual

Features + Benefits

  • 5 5/8in. and 7 3/4in. bolt circles, 7in. dia. pilot
  • 7 1/4in. x 3 1/2in. mounting base
  • Electric start
  • Full-pressure lube with spin-on oil filter
  • Heavy-duty canister air cleaner system
  • 1in. x 2.53in. front PTO shaft
  • Cast iron cylinder liners
  • Mechanical fuel pump
  • Remote controls
  • Hydraulic valve lifters
  • Oil Sentry®, shipped wired
  • 50-state compliant engine
  • Air cleaner ships separately
  • Muffler not included
Key Specs
Item# 24793
Brand Kohler Engines
Manufacturer's Warranty 3 Yr Consumer Limited
Ship Weight 108.0 lbs
Engine Displacement (cc) 725
Start Type Electric
Application Toro Exmark ZTR
Engine Type Air cooled
Torque (ft./lbs.) 39.2 (53.1 Nm) at 3,600 RPM
Displacement (cu. in.) 725
Shaft Output CCW
Crankshaft Hardened
Shaft Diameter (in.) 1 1/8
Shaft Length (in.) 2 3/4
Shaft Keyway (in.) 0.25
Shaft End Tapped (Diameter (in.)/Threads per inch) 7/16–20 UNF
Shaft Rotation (From PTO Shaft Side) CCW
PTO Height (in.) 6.125
Cylinders (qty.) 2
Cylinder Bore Cast iron liner
Bore x Stroke (in.) 3.3 x 2.6
Compression Ratio 9:1
Cooling System Air
Air Cleaner Type Canister
Fuel Type Gasoline
Fuel Pump Mechanical
Fuel Filter Yes
Oil Capacity (qt.) 2
Lubrication System Full pressure
Low Oil Alert Yes
Low Oil Shutdown Yes
Ignition System Electronic
Governor System Mechanical
Carburetor Smart choke
Throttle Control Remote
Choke Control Remote
Max. RPM 3,600
Charging System Amps 20A regulated
Muffler Included No
Bolt Circle (in.) 5.625 and 7.75, 7 in. pilot
Mounting Base L x W (in.) 7.250 x 3.504
Dimensions L x W x H (in.) 14 x 17 x 26 1/2
EPA/CARB Approval (California Air Resource Board) Yes

Customer Reviews

Product Question + Answer
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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Item# 24793
Kohler Command OHV Horizontal Toro/Exmark Zero-Turn Mower Replacement Engine — 725cc, 1 1/8in. x 2 3/4in. Shaft, Model# PA-CH740-3175 The price is $1,699.99.
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Hide Similarities
Engine Displacement (cc)
674 725 725 674 674
Start Type
Electric Electric Electric Electric Electric
Application Utility vehicle, sand trap rake, grain auger, boring equipment, carpet cleaning machines, pressure washers and furnace vacs Stump grinders, construction equipment, grain augers Toro Exmark ZTR Simplicity garden tractor Grasshopper zero-turn mower
Engine Type Gasoline Gasoline Air cooled Gasoline Command Pro OHV
Torque (ft./lbs.)
35 (47.5 Nm) at 3,600 RPM 38.4 (52.1 Nm) at 3,600 RPM 39.2 (53.1 Nm) at 3,600 RPM 35.7 (48.4 Nm) at 3,600 RPM 35.7 (48.4 Nm) at 3,600 RPM
Displacement (cu. in.)
- 725 725 41 41
Shaft Output
Counterclockwise CCW CCW Horizontal Horizontal
Crankshaft Hardened Hardened Hardened Hardened Hardened
Shaft Diameter (in.) 1 1/8 1.437 1 1/8 1 1/8 1 1/8
Shaft Length (in.) 4 4.453 2 3/4 2.79 3 11/32
Shaft Keyway (in.)
1/4 0.375 0.25 1/4 1/4
Shaft End Tapped (Diameter (in.)/Threads per inch) 7/16–20 UNF 5/8–18 UNF 7/16–20 UNF 1 1/2 deep x 7/16-20 UNF 17/16-20 UNF
Shaft Rotation (From PTO Shaft Side) Counterclockwise CCW CCW Counterclockwise Counterclockwise
PTO Height (in.)
6 1/8 6.125 6.125 6 1/8 6 1/8
Bearing Type
Parent material Sleeve - Parent material Parent material
Cylinders (qty.)
2 2 2 2 2
Cylinder Bore
Cast iron sleeve Cast iron liner Cast iron liner Cast iron sleeve Cast iron sleeve
Bore x Stroke (in.)
3 x 2.6 3.3 x 2.6 3.3 x 2.6 3 x 2.6 3 x 2.6
Compression Ratio
8.5:1 9:1 9:1 8.5:1 8.5:1
Cooling System
Air cooled Air Air Air cooled Air cooled
Air Cleaner Type
Dual element Dual element Canister Dual element Dual element
Fuel Type Gasoline Gasoline Gasoline Gasoline Gasoline
Fuel Pump
Mechanical Mechanical Mechanical Mechanical Mechanical
Fuel Filter
Large capacity Yes Yes Spin-on 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 Yes Yes Oil Sentry, shipped disconnected Yes
Ignition System
Electronic Electronic Electronic Electronic Electronic
Governor System
Variable speed Mechanical Mechanical Variable speed Mechanical
Carburetor
Smart Choke Smart choke Smart choke Smart Choke Smart choke
Throttle Control
Engine mounted Engine mounted w/keyswitch Remote Remote Remote
Choke Control
Smart Choke Engine mounted w/keyswitch Remote Remote Remote
Max. RPM
3,600 3,600 3,600 3,600 3,600
Charging System Amps 15 20A regulated 20A regulated 15 15
Muffler Included
No No No No Yes
Auto Compression Release
No - - No No
Bolt Circle (in.)
5 5/8, 7 3/4, 7 pilot 5.625 and 7.75, 7 in. pilot 5.625 and 7.75, 7 in. pilot 5 5/8, 7 3/4; 7 pilot 5 5/8, 7 3/4, 7 pilot
Mounting Base L x W (in.)
7 1/4 x 3 1/2 7.250 x 3.504 7.250 x 3.504 7 1/4 x 3 1/2 7 1/4 x 3 1/2
Mounting Bolt Pattern L x W (in.) 5 5/8, 7 3/4; 7 pilot 7.250 x 3.504 - 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 3/4 x 19 14 x 17 x 26 1/2 14 x 18 x 19 14 x 17 7/10 x 19
EPA/CARB Approval (California Air Resource Board)
Yes Yes Yes Yes Yes