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KT740-3097 Kohler 7000 Series Engine — 25 HP, 1-inch Vertical Shaft
Overview
Find a replacement powerplant for a compatible riding mower or zero-turn mower with the Kohler KT740-3097 7000 Series engine. This seller-listed new engine is advertised at 25 HP with a 1-inch diameter × 3-5/32-inch vertical crankshaft and a 15-amp alternator.
The KT740 family uses an air-cooled, four-cycle, OHV V-twin design with cast-iron cylinder liners and pressure lubrication with a full-flow oil filter. The complete KT740-3097 specification identifies the engine offered here.
Important: Match the complete engine specification and your mower's requirements before ordering. A matching horsepower rating or shaft diameter alone does not establish compatibility.
Kohler KT740-3097 Engine Specifications
| Manufacturer / Series | Kohler / 7000 Series |
|---|---|
| Model and Specification | KT740-3097 |
| Published KT740 Power Rating | 25 HP at 3,600 RPM |
| Advertised Displacement | 725cc |
| Engine Design | Four-cycle gasoline, OHV V-twin |
| Crankshaft Orientation | Vertical |
| Advertised Crankshaft Dimensions | 1-inch diameter × 3-5/32-inch length, keyed |
| Advertised Crankshaft End Thread | 7/16-20 |
| Starting System | Electric start |
| Advertised Charging System | 15-amp alternator |
| Cooling / Lubrication | Air cooling / pressure lubrication with full-flow oil filter |
| Condition | New, as listed by the seller |
Included Components
The seller identifies the following components and features:
- Kohler KT740-3097 engine assembly
- 15-amp alternator
- Oil filter and fuel pump
- Fuel shut-off solenoid
Muffler and fuel tank are not included. Confirm the exact wiring connectors, throttle and choke arrangement, exhaust components, and installation hardware in the current seller's offer.
Riding Mower & Zero-Turn Engine Fitment
Start with the original engine's model, specification, and serial number. An existing KT740 label without its specification suffix is not enough to select a replacement.
For equipment originally using KT740-3097, compare the identification label and installed configuration with the seller's engine photos. If your original specification differs, have a qualified engine dealer or repower specialist confirm the application.
- Crankshaft: Compare diameter, length, keyway, end thread, and shaft measurement reference points.
- Mounting and clearance: Confirm the mounting pattern, air-cleaner clearance, hood clearance, and exhaust routing.
- Electrical system: Match starter connections, charging requirements, fuel-solenoid wiring, and the mower's safety circuit.
- Controls: Confirm the throttle cable and choke configuration.
- PTO clutch and drive pulley: Check shaft engagement, pulley position, spacers, retaining hardware, and belt alignment.
This engine uses a 1-inch crankshaft. A clutch with a 1-1/8-inch bore does not directly match this shaft. Compare your existing clutch and drive components before planning the installation.
Before the First Start
The seller states that the engine ships without oil. Add the correct oil and verify the level before starting. Follow the applicable manufacturer's owner's manual for preparation and operation.
FAQ
Does this replace every Kohler KT740?
No. The specification suffix matters. Compare the complete engine code and installation requirements before choosing this KT740-3097.
Does it include a muffler or fuel tank?
No. The seller lists this engine without a muffler or fuel tank. Confirm whether your existing components can be transferred or whether different components are required.
How do I order this engine?
Use the Buy button on this page to view the seller's eBay listing. Review the final price, shipping, availability, included components, and return and warranty terms before ordering.
Need help identifying your existing engine or PTO clutch? Contact PTO Direct USA with clear photos of the engine label, mower identification tag, and clutch label. You can also browse our replacement engine collection or compare electric PTO clutches.
Affiliate disclosure: This engine is sold and fulfilled by the linked eBay seller. PTO Direct USA may earn a commission when you buy through our affiliate link, at no additional cost to you.