ALL THE POWER YOU DEMAND ON THE WATER

Transmissions

Twin Disc engineers more than 100 marine transmission models, from 35 to more than 4000 horsepower.

QuickShift

Experience the world’s smoothest, fastest shifting—plus amazing slow speed control. QuickShift uses internal clutch actuation to deliver cushioned torque and optimum power in milliseconds, whether you nudge the throttle or go full out.


Standard

Twin Disc has built a worldwide reputation on our ability to design, develop, and manufacture efficient, reliable power transmission systems for a variety of vessels and applications.


Electric & Hybrid

These innovative marine transmissions for serial hybrid and diesel electric propulsion support greener power transmission while delivering the reliability you expect from Twin Disc.


STANDARD TRANSMISSION

MG-5025A

Standard Equipment
  • Vertical offset, aluminum housing
  • 8° down angle on output shaft
  • Mechanical control valve
  • Oil strainer
Options
  • SAE J617 housing no. 3
  • SAE J617 housing no. 4
  • SAE J617 housing no. 5
  • Borg Warner housing
  • Flexible coupling for 8” flywheel (SAE J620 size 200)
  • Flexible coupling for 10” flywheel (SAE J620 size 255)
  • Flexible coupling for 11 ½” flywheel (SAE J620 size 290)
  • Electric control valve (12 VDC or 24 VDC)
  • Control cable bracket
  • Mechanical trolling valve
  • Oil cooler
  • Companion flange
INPUT RATINGS

KILOWATTS (KW) (HORSEPOWER (HP))*

For service classification definitions and important notes refer to the Twin Disc Marine Product Guide or contact Twin Disc directly.

Reduction Ratios

Pleasure Craft

Pleasure Craft

Intermediate Duty

Intermediate Duty

Continuous Duty

Continuous Duty

:1

@ 2800 RPM

@ 3600 RPM

@ 2500 RPM

@ 3200 RPM

@ 2300 RPM

@ 2500 RPM

1.52, 2.09

140 kW
(188 hp)

180 kW
(241 hp)

97 kW
(130 hp)

124 kW
(166 hp)

75 kW
(101 hp)

82 kW
(110 hp)

2.40

123 kW
(165 hp)

158 kW
(212 hp)

82 kW
(110 hp)

105 kW
(141 hp)

67 kW
(90 hp)

72 kW
(97 hp)

* Ratings shown for use with standard right hand rotation engines. The maximum allowable rated engine speed is 4500 rpm.

DIMENSIONS & WEIGHT

Specifications subject to change without prior notice in the interest of continual product improvement. Contact your local Twin Disc representative for engineering specifications, Survey Society Approvals and Classifications.

C

126 mm (4.96”)

S

87 mm (3.43”)

F

270 mm (10.63”)

L

165 mm (6.50”)

R

165 mm (6.50”)

A

Weight

38 kg *

* dry weight, including standard equipment

Publications
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