Exmark Replacement Engine — Kohler ZT720-3024 21 HP Confidant Vertical Engine Click to zoom

Kohler ZT720-3016 21 HP Confidant Vertical Engine, 1" x 3-5/32" Shaft, Fuel Pump

MPN ZT720-3016

In stockEngines

Specifications

Manufacturer
Kohler (now Rehlko)
Part number (MPN)
ZT720-3016
Rehlko spec number
PA-ZT720-3016
Series
Confidant
Gross power
21 HP
Displacement
725 cc
Cylinders
V-twin, OHV
Crankshaft orientation
Vertical
Crankshaft
1" x 3-5/32"
Fuel system
Carbureted gasoline
Fuel pump
Yes
Starter
Electric Start
Charging
12 Amp
Oil capacity
2.0 qt (1.9 L)
Muffler
Not Included
Shipping weight
131 lb
Condition
New, genuine OEM
Shipping
$200 flat-rate LTL freight (lower 48 + DC)

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.

The Kohler ZT720-3016 is a 21 HP 725cc Confidant V-twin vertical-shaft engine with a 1" x 3-5/32" crankshaft, a fuel pump and 12 amp charging. Factory spec: ZT720 E09 MARKETING - USE PA-Z.

Kohler Engines now operates under the name Rehlko. This is the same genuine Kohler ZT720-3016 engine (Rehlko spec PA-ZT720-3016); new units may carry Rehlko branding.

Why buy the ZT720-3016 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

  • 21 HP 725cc Confidant V-twin engine
  • Vertical crankshaft: 1" x 3-5/32"
  • Fuel pump included
  • Electric Start, 12 Amp charging
  • Oil capacity 2.0 qt (1.9 L); Rehlko/Kohler 10W-40 synthetic recommended (OCK-RKC-10440)

Specifications

Manufacturer Kohler (now Rehlko)
Part number (MPN) ZT720-3016
Rehlko spec number PA-ZT720-3016
Series Confidant
Gross power 21 HP
Displacement 725 cc
Cylinders V-twin, OHV
Crankshaft orientation Vertical
Crankshaft 1" x 3-5/32"
Fuel system Carbureted gasoline
Fuel pump Yes
Starter Electric Start
Charging 12 Amp
Oil capacity 2.0 qt (1.9 L)
Muffler Not Included
Shipping weight 131 lb
Condition New, genuine OEM
Shipping $200 flat-rate LTL freight (lower 48 + DC)

Fitment and replacement notes

  • 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 ZT720-3016 a Kohler or a Rehlko engine?

Both. Kohler Engines rebranded to Rehlko; the design, factory and part number are unchanged. Kohler ZT720-3016 and Rehlko PA-ZT720-3016 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" x 3-5/32" (vertical shaft). Always confirm against your original engine before ordering.

Is this a genuine OEM engine?

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

Not the right engine?

Get a repower quote

Old engine discontinued or out of stock? Send us the model/spec from your engine and we'll match a current replacement that bolts in.

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