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Kohler OHV Horizontal Exmark Zero-Turn Mower Replacement Engine with Electric Start — 725cc, 1 1/8in. x 2 3/4in. Shaft, Model# PA-CH730-3225

Item# 24791
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Kohler OHV Horizontal Exmark Zero-Turn Mower Replacement Engine with Electric Start — 725cc, 1 1/8in. x 2 3/4in. Shaft, Model# PA-CH730-3225

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Only $1999.99
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  •  Full-pressure lubrication system with spin-on oil filter
  • Flywheel PTO
  • Mechanical fuel pump
  • Cast iron cylinder sleeve for extended life
  • OHV design for cooler operation and longer valve life
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Factory Shipped —
Estimated Delivery: 5 - 7 Business Days
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Product Summary

This Kohler® OHV Horizontal Engine is designed to be used as a replacement engine for an Exmark Zero-Turn Mower. U.S.A.

What's Included
  •  (1) Engine

Features + Benefits

  •  Full-pressure lubrication system with spin-on oil filter
  • Flywheel PTO
  • Mechanical fuel pump
  • Cast iron cylinder sleeve for extended life
  • OHV design for cooler operation and longer valve life
  • Oil Sentry®, shipped wired
Key Specs
Item# 24791
Brand Kohler Engines
Manufacturer's Warranty 3 Yr Consumer Limited
Ship Weight 108.0 lbs
Engine Displacement (cc) 725
Start Type Electric
Application Exmark ZTR mowers
Engine Type Horizontal
Torque (ft./lbs.) 38.4 (52.1 Nm) at 3,600 RPM
Displacement (cu. in.) 44
Shaft Output CCW
Crankshaft Hardened
Shaft Diameter (in.) 1 1/8
Shaft Length (in.) 2 3/4
Shaft Keyway (in.) 0.250
Shaft End Tapped (Diameter (in.)/Threads per inch) 7/16-20 unf
Shaft Rotation (From PTO Shaft Side) CCW
PTO Height (in.) 6 1/8
Cylinders (qty.) 2
Cylinder Bore Cast iron
Compression Ratio 9:1
Cooling System Air
Air Cleaner Type Heavy-duty canister
Fuel Type Gas
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 20
Muffler Included Yes
Bolt Circle (in.) 5 5/8 and 7 3/4, 7 in. 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 3/4 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

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

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Item# 24791
Kohler OHV Horizontal Exmark Zero-Turn Mower Replacement Engine with Electric Start — 725cc, 1 1/8in. x 2 3/4in. Shaft, Model# PA-CH730-3225 The price is $1,999.99.
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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, skid steer loader, bale chopper, utility vehicle Garden tractor, zero-turn mower, sand trap rake, utility vehicle Stump grinders, construction equipment, grain augers Exmark ZTR mowers Construction, log splitter, chipper/shredder, mower
Engine Type Command V-Twin OHV Gasoline Gasoline Horizontal Command Pro OHV
Net Power Output (HP) - - - - 35
Torque (ft./lbs.)
35 (47.5 Nm) at 3,600 RPM 35 (47.5 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 41 725 44 999
Shaft Output
Horizontal Horizontal CCW CCW CCW
Crankshaft Hardened Hardened Hardened Hardened Hardened
Shaft Diameter (in.) 1 1/8 1 1.437 1 1/8 1.437
Shaft Length (in.) 4 3 4.453 2 3/4 4.46
Shaft Keyway (in.)
1/4 3/8 0.375 0.250 0.375
Shaft End Tapped (Diameter (in.)/Threads per inch) 1.5-in. deep 7/16-20 UNF 1 x 3/8-24 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) Counterclockwise CCW CCW CCW CCW
PTO Height (in.) 6 1/8 6 1/8 6.125 6 1/8 -
Bearing Type
Parent material No Sleeve - Heavy-duty
Cylinders (qty.)
2 2 2 2 2
Cylinder Bore
Cast iron Cast iron Cast iron liner Cast iron Cast iron sleeve
Bore x Stroke (in.)
3.1 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
Large capacity in-line In line Yes Yes Large capacity in-line
Oil Capacity (qt.)
2 2 2 2 2
Lubrication System
Full pressure Full-pressure lubrication w/full-flow filter Full pressure Full pressure Full pressure lubrication
Low Oil Alert
Yes Oil Sentry, shipped disconnected Yes Yes Oil sentry, installed/wired, not connected
Low Oil Shutdown
Oil Sentry, shipped disconnected Yes 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 15 20A regulated 20 25A alternator, regulated
Muffler Included
No No No Yes No
Flywheel Brake - No - - -
Auto Compression Release
No No - - Yes
Bolt Circle (in.) 5 5/8, 7 3/4, 7 pilot 5, 6 1/2, 7 3/4; 5 3/4 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 19 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