Delco Remy Heavy Duty Starters

Delco Remy Heavy Duty Starters

Industry Leading Reliability and Durability in All Applications

Designed to start heavy duty and off-road vehicles in all conditions and environments, Delco Remy starters are engineered to perfection. Available proprietary features also protect the starter from system problems including over cranking, low battery capacity, voltage spikes, high-starting circuit resistance, or operator misuse.

OEM’s count on Delco Remy to deliver premium quality and innovative solutions for the latest vehicle designs. In the aftermarket, dealers, warehouse distributors and fleets around the world trust our starters to deliver superior cranking power and durability.

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  • Complete coverage: A full portfolio for all truck classes, buses, off-highway vehicles and locomotives.
  • Reliable: Units available with Integrated Over Crank Protection (IOCP), a built-in circuit breaker that protects the starter from thermal damage. 
  • Electrical soft-start: Consistently and accurately engages the pinion with the ring gear providing increased reliability.
  • Durable: Units available with patented Internal Magnetic Switch Solenoid (IMSS) that reduces corrosion and vibration issues while extending life.

Starters by Vehicle Type

Starters by Model Family

28MT

Delco Remy 28MTTM Gear Reduction Starter

The 28MT is a gear reduction design available in 12 and 24 volt for medium duty engine applications up to 6.5 liter.

 31MT-25

Delco Remy 31MTTM Gear Reduction Starter

Developed from the 29MT design - of which there are more than 1.25 million OE units installed - the 31MT prodvides a wide range of coverage for Class 6 & 7 commercial vehicles.  This robust, corrosion resistant starter is ideal for applications with frequent start and stops.

35MT Gear Reduction Starter

Delco Remy 35MTTM Gear Reduction Starter

The 35MT is a gear reduction starter for medium duty applications providing more power in a smaller package with patented technology to reduce corrosion and vibration issues. The 35MT features a patented internal magnetic switch solenoid (IMSS) eliminating the need for an IMS switch.

37MT Straight Drive Starter

Delco Remy 37MTTM Straight Drive Starter

The 37MT is a straight drive starter for medium duty applications with engine displacement up to 9.0L.

38MT Gear Reduction Starter

Delco Remy 38MTTM Gear Reduction Starter

The 38MT is a gear reduction starter for medium and heavy duty applications featuring electrical soft start technology to prevent ring gear damage.

 38MT+ Gear Reduction Starter

Delco Remy 38MT+TM Gear Reduction Starter

The 38MT+ is a gear reduction starter designed to fit PACCAR MX 11 and 13 Liter engines. The 38MT+ provides faster cranking speeds in a lighter package compared to the competition.  Available with Integrated Over-Crank Protection (IOCP), a built-in circuit breaker, protects the starter from thermal damage, automatically resetting at a safe operating temperature while eliminating the need for a wiring harness. The IOCP protects the starter in adverse starting conditions, such as cold weather cranking, lower battery capacity, high starting circuit resistance or operator misuse. 

39MT Gear Reduction Starter

Delco Remy 39MTTM Gear Reduction Starter

The 39MT is a gear reduction starter ideal for heavy duty truck and off highway applications. The drive has an electrical soft start that rotates the pinion for proper ring gear engagement before cranking, minimizing tooth abutment related damage. The sealed solid link solenoid eliminates contact welding in low system voltage situations, providing enhanced reliability. Sealed noseless configuration minimizes debris accumulation and contamination reducing maintenance expense.

 41MT Straight Drive Starter

Delco Remy 41MTTM Straight Drive Starter

The 41MT is a straight drive starter for heavy duty applications rated at 5.0 kW for 12 volt applications and 7.0 kW for 24 volt applications.

 42MT Straight Drive Starter

Delco Remy 42MTTM Straight Drive Starter

The 42MT is a straight drive starter for heavy duty applications available in 12 volt and 24 volt configurations.  The 42MT features a Semi Solid Link solenoid and optional Over-Crank Protection.

 50MT Heavy Duty Straight Drive Starter

Delco Remy 50MTTM Straight Drive Starter

The 50MT is a straight drive starter for heavy duty and industrial applications.  The 50MT is available in 12, 24, 32, and 64 volt models and can start engines with displacement up to 29.5 liters.

Starter Features

Electrical Soft-Start

The redefined Electrical Soft-Start reduces wear and tear by slowly rotating the pinion until it properly engages into the ring gear before cranking.  This also minimizes tooth abutment, ultimately to extend starter life. Watch the animation below to see how it works.

Over Crank Protection (OCP)

OCP technology is a built-in circuit breaker that protects the starter from thermal damage and automatically resets at a safe operating temperature. OCP protects the starter in adverse starting conditions, such as cold weather cranking, lower battery capacity, high-starting circuit resistance, or operator misuse. OCP is an option available today on 41MT™, 42MT™, 39MT™. 

Internal Magnetic Switch Solenoid (IMSS)

Enhance Starter Reliability

IMSS (patent pending) is a one-wire design integrated inside the solenoid. Input current is capable of ECM control and protects it from voltage spikes.  IMSS withstands engine temperature up to 120°C/248°F. Because of its integration inside the solenoid, it is protected from corrosion caused by environmental factors and damage from vibration issues.

IMSS Simplifies Installation:

  • No additional wiring or mounting bracket required
  • Reduced customer wiring harness complexity
  • Removes connection points, reducing corrosion

Internal Magnetic Switch Solenoid (IMSS)

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