Spring Starters


IPU’s range of spring starter motors are a reliable, cost-effective way of providing manual starting for diesel engines in a variety of applications. Available for engines up to 12 litres, they are ideally suited to harsh environments such as offshore and marine and provide an ideal low-cost alternative to electric starting systems.
How Does a Spring Starter Work?
IPU Spring Starter Motors come complete with a winding handle. Simply push a button on the motor to engage it and wind the handle until a coloured indicator on the motor changes. Then remove the winding handle and, to start the engine, pull on the trip lever on the motor. It’s that simple!
Spring Starter Customer Benefits:
  • Guaranteed starting. Manual operation ensures engine cranking is unaffected by long shutdowns, damp, cold or harsh environment.
  • Reliability. A long and proven track record with many spring starters still operating after decades in service.
  • Space and weight saving. Starting at only 18kg and less than 50% the weight of a conventional electric starter.
  • Operator safety. The crank will not fly off or kick back during operation, and the motor can be unwound if not required.
  • Ease of use. Spring starters are a direct ‘bolt-on’ alternative to electric starters providing quick and easy installation.
  • Reduces battery costs. For certain applications, such as pumps, welders and gen-sets you can remove the need for a battery completely.
  • Lower electrical costs. Without the need for an electric starter a lighter duty alternator can be fitted or your existing alternator will last longer.



Simms SM series starter motor

Simms SZ series Z drive starter motor

Simms SZH2 series starter motor