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Kohler PA-ZT730-3039 Engine, Replaces PA-ZT730-3025

The Kohler PA-ZT730-3039 Confidant Engine is a commercial-grade vertical-shaft replacement engine designed for select Toro lawn and zero-turn mower applications. It replaces PA-ZT730-3025 and may also supersede ZT730-3018, provided the complete engine configuration matches the original installation.

Key Features

  • Commercial-grade Kohler Confidant series
  • Designed for select Toro equipment
  • Replaces Kohler PA-ZT730-3025
  • Additional cross-reference: ZT730-3018
  • 747cc four-cycle V-twin OHV engine
  • Maximum output of 23 horsepower
  • Approximately 42.1 ft-lb of peak torque
  • Bendix-drive electric starter
  • Electronic ignition
  • 15-amp charging system
  • Pressure lubrication
  • Full-flow oil filter
  • Heavy-duty air cleaner
  • Cast-iron cylinder liners
  • Mechanical fuel pump
  • Remote throttle and choke
  • Fuel tank and muffler not included

Specifications

Specification Details
Brand Kohler
Series Confidant
Engine model ZT730
Specification number ZT730-3039
Manufacturer part number PA-ZT730-3039
Replaces PA-ZT730-3025
Additional cross-reference ZT730-3018
OEM application Select Toro equipment
Engine orientation Vertical shaft
Engine configuration V-twin
Engine cycle Four-cycle
Valve configuration OHV
Displacement 747cc / 45.6 cu. in.
Maximum power 23 HP / 17.2 kW
Rated speed 3,600 RPM
Peak torque Approximately 42.1 ft-lb / 57.1 Nm
Peak torque speed Approximately 2,400 RPM
Bore 3.27 in. / 83 mm
Stroke 2.72 in. / 69 mm
Compression ratio 9.1:1
Cooling system Forced air
Fuel type Unleaded gasoline
Fuel system Carbureted
Fuel pump Mechanical fuel pump included
Starting system 12V Bendix-drive electric start
Charging system 15 amp
Ignition system Electronic
Governor Mechanical
Lubrication system Pressure lubrication
Oil filter Full-flow oil filter included
Oil capacity Approximately 2 US qt. / 1.9 L
Air cleaner Heavy-duty air cleaner
Throttle control Remote
Choke control Remote
PTO shaft type Straight, keyed shaft
PTO shaft diameter 1 in.
PTO shaft length Approximately 3.16 in. / 3-5/32 in.
Keyway width 1/4 in., full-length
Crankshaft end 7/16-20 drilled and tapped
PTO rotation Counterclockwise when viewed from PTO side
Fuel tank Not included
Muffler Not included
Approximate dimensions 18.6 × 17.8 × 13.9 in.
Approximate dry weight 91 lb
UPC/GTIN 885612805591
Warranty Three-year limited manufacturer warranty

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