Product Description
Kohler PA-CH740-3145 - CH740 E3 SCAG
(Replaces PA-CH740-3132, PA-CH740-0021 & PA-CH740-3172)
The Kohler PA-CH740-3145 is a 25 HP Command PRO horizontal shaft engine engineered for commercial turf, zero-turn mowers, and heavy-duty outdoor equipment. Featuring a 747 cc overhead valve V-Twin design, this engine delivers robust torque and reliable electric starting performance for a wide range of demanding applications.
Built to replace older CH740 models and specific OEM parts (including PA-CH740-3132, PA-CH740-0021, and PA-CH740-3172), the PA-CH740-3145 is commonly used on commercial SCAG Turf Tiger mowers and similar equipment that require a horizontal shaft power unit with a 1.125″ × 3-11/32″ crankshaft and strong regulated electrical output.
Engine Specifications
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Engine Manufacturer: Kohler
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Engine Series: Command PRO
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OEM Part Number: PA-CH740-3145
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Replaces: PA-CH740-3132, PA-CH740-0021, PA-CH740-3172 (and other CH740 variants)
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Engine Type: 4-Cycle, Air-Cooled, OHV V-Twin Gasoline Engine
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Horsepower: 25 HP (gross) — verified spec for this part number
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Displacement: 747 cc (~45.6 cu in) — confirmed by dealer listings
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Cylinder Configuration: V-Twin
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Fuel System: Carbureted
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Starting System: Electric Start
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Shaft Orientation: Horizontal
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Crankshaft Diameter: 1.125″ (1-1/8″)
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Crankshaft Length: 3-11/32″ (≈ 3.34″)
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Crankshaft Thread: 7/16-20 UNF with 1/4″ keyway
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Lubrication System: Full-Pressure with Spin-On Oil Filter
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Charging System: 20–25 Amp Regulated Alternator (dealer listings vary slightly)
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Oil Capacity: Approx. 2.0 qt
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Cooling System: Air-Cooled
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Emissions Compliance: EPA compliant (configuration dependent)
Key Features
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25 HP Commercial Command PRO Output – Strong gross horsepower for demanding tasks
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747 cc OHV V-Twin Design – Smooth torque delivery with efficient combustion
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1.125″ × 3-11/32″ Crankshaft – Standard OEM horizontal shaft configuration with keyed design
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Electric Start System – Dependable ignition with minimal effort
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Full-Pressure Lubrication Protection – Spin-on oil filter for extended engine life
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Regulated Charging System – Provides reliable electrical output for accessories
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Heavy-Duty Air Filtration – Protects internal components in commercial environments
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Integrated Oil Coolers – Helps maintain optimal oil temperature under load
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Large Sleeve Bearings – Enhanced load-bearing capacity for commercial use
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Direct Replacement Fitment – Replaces multiple older CH740 series part numbers for SCAG and similar equipment
Warranty
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Manufacturer: Kohler
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Commercial Warranty: 3-Year Limited
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Consumer / Residential Warranty: 3-Year Limited
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Coverage subject to Kohler factory warranty terms, proper installation and maintenance.
***NO RETURNS OR EXCHANGES ON ENGINES. ALL ENGINE SALES ARE FINAL.
ALL ENGINES ARE BRAND NEW WITH FULL FACTORY WARRANTY.
KOHLER ENGINES ARE ELIGIBLE FOR A 1 YEAR EXTENDED WARRANTY WITH PURCHASE OF MAINTENANCE/SERVICE KIT.***
