Ariens Replacement Engine — Kohler ZT740-3048 25 HP Confidant PRO Vertical Engine Click to zoom

Bad Boy Replacement Engine — Kohler ZT740-3048 25 HP Confidant PRO Vertical Engine

MPN ENGINE

In stockReplacement Engine

Overview

🚚 Flat-rate LTL freight: $200
Ships palletized by LTL freight to the lower 48 states + DC for a flat $200. Need it fast? Choose Expedited or Need It Fast ($235.95) at checkout and we'll call you with the fastest options.

Need a replacement engine for your Bad Boy equipment? This is a brand-new, genuine Kohler ZT740-3048 (Rehlko spec PA-ZT740-3048) 25 HP Confidant PRO vertical-shaft engine with a 1-1/8" x 4-5/16" crankshaft — the engine spec used on Bad Boy machines.

Kohler Engines now operates as Rehlko; same engine, same factory, same part number. Ships new in the crate with the manufacturer's engine warranty.

Before you order: confirm fitment

  • Check the engine tag on your Bad Boy machine: it should read ZT740-3048 / PA-ZT740-3048 or an older spec this engine replaces (ZT720-3007, ZT720-3030, ZT730-3005, ZT730-3033, ZT730-3035, ZT730-3036, ZT730-3041, ZT730-3044).
  • Match crankshaft diameter and length, mounting pattern, PTO/clutch, fuel and wiring connections.
  • Not sure which engine your machine has? Call (646) 666-7225 with your machine model and serial number and we'll confirm the right spec.

Engine specifications

Manufacturer Kohler (now Rehlko)
Part number (MPN) ZT740-3048
Rehlko spec number PA-ZT740-3048
Series Confidant PRO
Gross power 25 HP
Displacement 747 cc
Cylinders V-twin, OHV
Crankshaft orientation Vertical
Crankshaft 1-1/8" x 4-5/16"
Fuel system Carbureted gasoline
Fuel pump Yes
Starter Electric Start
Charging 15 Amp
Oil capacity 2.0 qt (1.9 L)
Muffler Not Included
Shipping weight 131 lb
Condition New, genuine OEM
Fits Bad Boy

Frequently asked questions

What engine does the Bad Boy use?

This listing is the Kohler ZT740-3048 spec (25 HP). Always confirm against the tag on your existing engine.

How much is shipping?

Engines ship palletized by LTL freight for a flat $200 to the lower 48 + DC. Expedited / Need It Fast ($235.95) is available at checkout.

Is this the same engine as Kohler ZT740-3048?

Yes — this is the same new Kohler/Rehlko engine sold on our Kohler ZT740-3048 page, listed here by machine for easy lookup.