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. This kit will be custom to fit your unit and your needs. 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. 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.