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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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Engine Displacement (cc)
674 725 725 725 999
Start Type
Electric Electric Electric Electric Electric
Application Garden tractor, zero-turn mower, sand trap rake, utility vehicle Stump grinders, construction equipment, grain augers Toro Exmark ZTR Exmark ZTR mowers Construction, log splitter, chipper/shredder, mower
Engine Type Gasoline Gasoline Air cooled Horizontal Command Pro OHV
Net Power Output (HP) - - - - 35
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 38.4 (52.1 Nm) at 3,600 RPM 54.5
Displacement (cu. in.)
41 725 725 44 999
Shaft Output
Horizontal CCW CCW CCW CCW
Crankshaft Hardened Hardened Hardened Hardened Hardened
Shaft Diameter (in.) 1 1.437 1 1/8 1 1/8 1.437
Shaft Length (in.) 3 4.453 2 3/4 2 3/4 4.46
Shaft Keyway (in.)
3/8 0.375 0.25 0.250 0.375
Shaft End Tapped (Diameter (in.)/Threads per inch) 1 x 3/8-24 UNF 5/8–18 UNF 7/16–20 UNF 7/16-20 unf Drilled/tapped, 1.5 Deep x 5/8-18 UNF
Shaft Rotation (From PTO Shaft Side) CCW CCW CCW CCW CCW
PTO Height (in.) 6 1/8 6.125 6.125 6 1/8 -
Bearing Type
No Sleeve - - Heavy-duty
Cylinders (qty.)
2 2 2 2 2
Cylinder Bore
Cast iron Cast iron liner Cast iron liner Cast iron Cast iron sleeve
Bore x Stroke (in.)
3 x 2.6 3.3 x 2.6 3.3 x 2.6 - 3.5 x 3.1
Compression Ratio
8.5:1 9:1 9:1 9:1 8.8:1
Cooling System
Air cooled Air Air Air Air
Air Cleaner Type
Dual element Dual element Canister Heavy-duty canister Canister type
Fuel Type Gasoline Gasoline Gasoline Gas Gasoline
Fuel Pump
Mechanical Mechanical Mechanical Mechanical Mechanical
Fuel Filter
In line Yes 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 Yes Yes Yes, Oil sentry, installed/wired, not connected
Ignition System
Electronic Electronic Electronic Electronic Electronic
Governor System
Variable speed Mechanical Mechanical Mechanical Variable speed
Carburetor
Smart Choke Smart choke Smart choke Smart choke Smart choke
Throttle Control
Remote Engine mounted w/keyswitch Remote Remote Remote
Choke Control
Remote Engine mounted w/keyswitch Remote Remote Smart choke
Max. RPM
3,600 3,600 3,600 3,600 3,600
Charging System Amps 15 20A regulated 20A regulated 20 25A alternator, regulated
Muffler Included
No No No Yes No
Flywheel Brake No - - - -
Auto Compression Release
No - - - Yes
Bolt Circle (in.) 5, 6 1/2, 7 3/4; 5 3/4 pilot 5.625 and 7.75, 7 in. 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 7.250 x 3.504 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 7.250 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 3/4 x 19 14 x 17 x 26 1/2 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