How Spring Starting Works

spring starters require no external power systems unlike their electric, air (pneumatic) or hydraulic counterpart systems.  They are simple, compact, and dependable and often the preferred choice for backup starting.


The Kineteco range of spring starters are a direct replacement for the existing electric (or other) starter system, making them easy and simple to fit.

Using a Kineteco spring starter is safe and easy.  The user winds the starter using the supplied cranking handle.  The winding ratchet means the user can wind as fast or as slowly as they wish.  Once wound, the spring starter can be tripped as and when the user is ready and chooses to do so.  There is none of the risk associated with electrical, pneumatic or hydraulic energy sources.

Kineteco spring starters convert stored potential energy, in the form of a wound up spring, into rotational kinetic energy used to turn over and start the engine.  The spring is wound by simple hand cranking.  The energy is released by pushing a lever on the starter.

There are two types of spring used in Kineteco spring starters:

Disc Springs (also referred to as ‘Belleville Washers’) – conically shaped steel washers which are compressed by means of a ball screw.

Disc spring benefits for spring starting are:

  • High output torque
  • Robust

Power Springs (also referred to as ‘clock’) – coiled flat steel sheet which is wound up.

Power spring benefits for spring starting are:

  • High number of  output revolutions
  • Compact

Kineteco use both types of spring in their product range, each having advantages in different applications.

Kineteco models using disc springs:

  • SS/SR

Kineteco models using power springs:


In addition to differing spring technologies, Kineteco have pioneered the use of gearbox technology in spring starting.  Using a Z-drive gearbox on the SZS/SZR and SZHS/SZHR models not only allows the energy delivery from the spring to be tuned to the engine starting application but also allows the body of the spring starter to be moved away from the engine and create more clearance.