Kohler ZT740-3048 25 HP Confidant PRO Vertical Engine, 1-1/8" x 4-5/16" Shaft, Fuel Pump (for Bad Boy Mowers)

The Kohler ZT740-3048 is a 25 HP 747cc Confidant PRO V-twin vertical-shaft engine with a 1-1/8" x 4-5/16" crankshaft, a fuel pump and 15 amp charging. This spec is built for Bad Boy Mowers equipment. Factory spec: ZT740 E10 BAD BOY.

Kohler Engines now operates under the name Rehlko. This is the same genuine Kohler ZT740-3048 engine (Rehlko spec PA-ZT740-3048); new units may carry Rehlko branding.

Why buy the ZT740-3048 from RFQQQ

• Brand new, genuine Kohler OEM engine backed by the manufacturer's engine warranty
• $200 flat-rate LTL freight to the lower 48 + DC; Expedited / Need It Fast available
• Pro accounts, net terms and POs for dealers, rental yards and landscape contractors
• Real people on the phone at (646) 666-7225 to confirm fitment before you order

Key features

• 25 HP 747cc Confidant PRO V-twin engine
• Vertical crankshaft: 1-1/8" x 4-5/16"
• Fuel pump included
• Electric Start, 15 Amp charging
• Oil capacity 2.0 qt (1.9 L); Rehlko/Kohler 10W-40 synthetic recommended (OCK-RKC-10440)

Specifications

Fitment and replacement notes

• Factory replacement for older specs ZT720-3007, ZT720-3030, ZT730-3005, ZT730-3033, ZT730-3035, ZT730-3036, ZT730-3041, ZT730-3044, ZT740-3009, ZT740-3052 (Ariens, Bad Boy, Excel, Husqvarna, U-Young).
• Muffler, mounting hardware and OEM-specific brackets are generally not included unless noted — reuse your existing exhaust and hardware.
• Before ordering, match crankshaft diameter and length, mounting pattern, PTO/clutch, fuel and wiring connections to your current engine tag. Not sure? Call (646) 666-7225 with your engine model and spec number and we'll confirm.

Frequently asked questions

Is the ZT740-3048 a Kohler or a Rehlko engine?

Both. Kohler Engines rebranded to Rehlko; the design, factory and part number are unchanged. Kohler ZT740-3048 and Rehlko PA-ZT740-3048 are the same engine.

How much does shipping cost?

Engines ship palletized by LTL freight for a flat $200 to the lower 48 states and DC. Expedited / Need It Fast ($235.95) is available at checkout — we call you with the fastest options.

What is the crankshaft size?

1-1/8" x 4-5/16" (vertical shaft). Always confirm against your original engine before ordering.

What does the ZT740-3048 replace?

It is the factory replacement for ZT720-3007, ZT720-3030, ZT730-3005, ZT730-3033, ZT730-3035, ZT730-3036, ZT730-3041, ZT730-3044, ZT740-3009, ZT740-3052.

Is this a genuine OEM engine?

Yes — brand new, genuine Kohler engine with the manufacturer's warranty.