Heavy Duty Alternator

Delco Remy 42MT™ Heavy Duty 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.

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Installation Instructions
Service Parts


Engine Size 12 Volt up to 14.8L
24 Volt up to 16.0L
System Voltage 12 or 24 Volts
Rotation Clockwise
Mounting SAE #1, SAE #3
Pinion 11 Tooth, 6-8 Pitch
12 Tooth, 8-10 Pitch
13 Tooth, 8-10 Pitch
11 Tooth, MOD 3 (Metric)
12 Tooth, MOD 3 (Metric)
Peak Output 12 Volt 7.3 kW
24 Volt 8.0 kW
Battery Internal Resistance 12 Volt 2 mOhm
24 Volt 8 mOhm
Weight 58.0 lbs / 26.3 kg
Frame Diameter 5.12 in / 130 mm
Overall Length 19.53 in / 496.0 mm
Motor Type Wound Field
Straight Drive
Pinion Support Nose
Drive Design Two-piece rotatable drive housing
(12 or 24 positions)
Positive Engagement
Rubber Shock Absorber
Optional Features Jumpstart Protection
(meets SAE J1493)
Over-Crank Protection
*(US/Canada Only)
1 year / unlimited miles
18 month / unlimited miles - Reman


Over-Crank Protection

Over Crank protection on the Delco Remy 42MT starter protects the starter in adverse starting conditions, such as cold weather cranking, lower battery capacity, high-starting circuit resistance or operator misuse.

Semi Solid Link Solenoid

The semi-solid link solenoid on the Delco Remy 42MT minimizes joint relaxation and potential loss of connection integrity over the life of the starter.

Power Rating

The Delco Remy 42MT cranks up to 10 and a half percent faster than the competition.