S50

The S50 Spring Starter is a powerful manual starter for diesel engines up to 10 litres.

Available as a clockwise rotation model, the S50 is the first manually operated starter in the world capable of starting diesel engines over 8 litres, making it a cost-effective alternative to electrical starting systems.

Download Catalogue

Request Quote

Explore Options

Jump to: Key advantages, Optional features and configurations, Technical specs, Compare solutions

SOLUTION DETAILS

High-capacity manual starting

The S50 Spring Starter is suitable for diesel engines up to 10 litres (610.2 cubic inches) and is available as a clockwise model. For smaller engines, the S20, S30, or S40 spring starters are recommended, while larger engines may require the S60 or S70 models.

World-first capability

The S50 is the first manually operated starter to successfully start diesel engines over 8 litres (488.2 cubic inches) in capacity. It provides an economical and reliable starting solution for heavy-duty engines.

Economical alternative

Compared to other non-electrical starting systems, the S50 offers significant cost benefits. Its performance rivals that of electrical starters, making it an attractive choice for shipping companies and industrial operators worldwide.

Proven in diverse applications

The S50 is widely used across multiple engine brands, including Caterpillar, Cummins, Detroit, Man, Perkins, Scania, and Volvo, proving its versatility and dependability in demanding environments.

Key Advantages

High engine capacity: Starts diesel engines up to 10 litres (610.2 cubic inches).
World-first performance: First manual starter to start engines over 8 litres capacity.
Economical operation: More cost-effective than other non-electrical systems, while competing with electric starters.
Wide compatibility: Suitable for leading engine brands including Caterpillar, Cummins, Detroit, Man, Perkins, Scania, and Volvo.
Proven reliability: Used worldwide in marine and industrial environments.
No external power required: Manual operation ensures dependable starting anywhere, without batteries or external energy.

Optional Features and Configurations

Clockwise Rotation

Technical Specs

Performance

Rotation

S50C: clockwise

Engine capacity

1.5 litres (91.5 cubic inches) per cylinder; 6 cylinders maximum1.25 litres (76.3 cubic inches) per cylinder; 8 cylinders maximum

Pinion type

11 to 13 teeth 10/12 F/stub11 to 12 teeth 6/8 F/stub11 to 13 teeth Mod 3

Pinion to flange face

47mm (nominal)

Maximum torque at pinion

126 Nm (93 ft/lb)

Maximum winding handle torque

81 Nm (60 ft/lb)

Turns to fully wind

2.0 turns to engage15.0 turns to fully charge

Winding handle position

Variable in 8.5 degree increments

Cold start

Starting aid below 5 degrees Celsius

Physical

Mass

21.5 kg (47.4 lb)

Mounting

Flange-mounted SAE 1; SAE 2; SAE 3

Finish

Marine finish as standard: zinc-plated body and housing; powder-coated paint all over to withstand marine environment. Electroless nickel-plated shaft and pinion.