FD620D Engine Replacement


This is an open ended FD620D replacement kit that we will try to work together on to replace your worn out FD620D engine with a newer, larger, more efficient FD750D engine. We know there are a lot of different pieces of equipment out there with the FD620D engine installed that we want to retrofit something newer and better as a replacement.

We have various exhaust manifold and muffler options available. We also have custom control boxes with engine alerts that can be used for any new project you may want to design. We have been using and retrofiring the Kawasaki water cooled series of engines since their beginning. We have sold countless numbers of the FD series models for all sorts of applications. We have found however that because of the larger size and different crankshaft dimension of the FD750D, we are not able to supply an engine replacement option for the John Deere Gators, Kawasaki Mule, Or Argo platforms. We do however try to keep in stock the rebuild parts for the FD620D engine.

Contact us for more details.


  • Model FD750D
  • Type 4-stroke, OHV, V-twin 90°
  • Crankshaft 1.125 in.
  • Displacement 745 cm 3 (45.46 cu-in)
  • Max. horsepower 27.3 PS (20.1 KW; 27.0 HP) at 3,600 rpm
  • Max. torque (crank PTO) 58.3 Nm (5.95 kg·m; 43.03 ft·lb) at 2,400 rpm
  • Carburetor Float type carburetor with fixed main jet
  • Cooling system Liquid-cooling, Pressurized forced circulation type
  • Ignition system Transistorized ignition
  • Lubricating system Pressurized lubrication system
  • Starting system Electric starter
  • Charging system 12 Volt – 20A or 30A with regulator
  • Fuel used Unleaded gasoline (octane number 86 or higher)
  • Fuel consumption 230 g/HPh Cooling system


  • Kawasaki FD750D
  • Length, mm (in) 520 (20.5)
  • Width, mm (in) 458 (18.0)
  • Height, mm (in) 580 (22.8)
  • Dry weight, kg (lb) 57.0 (125.7)


  • Maximum speed 3500 ± 100 rpm
  • Idle speed 1500 ± 100 rpm
  • Cylinder compression 7.5 kg/cm2 (107 psi) at 500 rpm
  • Valve clearance Intake valve 0.15 mm (0.006 in)
  • Exhaust valve 0.15 mm (0.006 in)
  • Oil type 4-stroke or an equivalent (SC, SD, SE, SF, SG, or SH) Recommended oil SAE 10W-40, 10W-30, 5W-20
  • Oil capacity (with filter changed) 1.8-2.0 L (1.9-2.1 US qt)
  • Spark plug NGK: BPR2ES Spark plug gap 0.75 mm (0.03 in)
  • Spark plug tightening torque 25 Nm; 2.5 kg·m; 18.5 ft·lb
  • Ignition coil air gap 0.25-0.40 mm (0.009-0.015)
Contact us for further Details. We have the ability to make custom brackets, bushings, and wiring harnesses. This kit will also take time to produce as information will be needed to be gathered about the specific piece of equipment we are mounting a larger engine into.