Twin Disc MG-5065

Twin Disc MG5065 Marine Transmission Parts Catalog

Introduction: Reliable Power and Durability for Marine Applications

The Twin Disc MG5065 marine transmission is known for its reliable power transfer, durable construction, and exceptional performance across a variety of marine applications. Featuring vertical offset, cast iron housing, mechanical control valves, and high-speed configurations, the MG5065 series is trusted by operators around the world to keep vessels running smoothly.

At Diesel Pro Power, we provide a complete selection of MG5065 parts, including overhaul kits, gaskets, clutch plates, seals, and more. Our commitment to quality, combined with fast shipping, competitive pricing, and expert support, ensures that your MG5065 transmission stays in top condition.

Our Selection of Twin Disc MG5065 Parts

We’re the largest online retailer specializing in engine replacement parts, and our MG5065 catalog is no exception. Our extensive inventory makes it easy to find exactly what you need:

Overhaul Plate Kit – For Twin Disc MG5065 Transmission

Includes a complete set of brass friction plates and steel plates, along with essential components like gaskets and, optionally, oil pressure gauges and senders. This kit is engineered for durability and smooth clutch engagement, restoring your transmission’s performance during major maintenance.

Gasket Set – For Twin Disc MG5065 Transmission

A comprehensive gasket set, featuring gaskets, front and rear seals, and a ring kit, designed to maintain a leak-free seal and system pressure during overhauls. Crafted from premium materials to withstand high-pressure marine conditions.

Clutch Plates – For Twin Disc MG5065 Transmission

High-quality brass and steel clutch plates are available individually for targeted repairs or upgrades, ensuring consistent performance without needing a full kit. Designed for smooth engagement and reliable power transfer.

Individual Seals – For Twin Disc MG5065 Transmission

Includes both front and rear seals, designed to prevent fluid leaks and maintain internal pressure. Manufactured from marine-grade materials to handle harsh environments and operational stress.

Oil Strainer – For Twin Disc MG5065 Transmission

Ensures clean lubrication by filtering out contaminants and debris, protecting internal components and extending system lifespan.

Additional Parts Available:

• Oil Filters

• Pressure Gauges and Senders

• Mounting Hardware

• Gaskets and Seals

Our comprehensive inventory ensures that you’ll find the right parts for any repair or maintenance project, all at cost-effective prices.

Why Choose Diesel Pro Power for MG5065 Parts?

• 24-Hour Worldwide Shipping: We process and ship most orders within 24 hours, ensuring minimal downtime for your vessel.

• Excellent Customer Service: Our knowledgeable team is ready to assist with product selection, specifications, and technical support.

• Over 15,000 Satisfied Customers: Trusted worldwide for our exceptional service, competitive pricing, and quality parts.

• User-Friendly Website: Easily navigate our catalog, find parts specific to your engine, and complete your order—all from the comfort of your desk.

• Great Reviews: Our commitment to quality and customer service is reflected in our outstanding reputation.

Frequently Asked Questions (FAQs) about the Twin Disc MG5065

1. What types of vessels use the MG5065 transmission?

The MG5065 is used in a variety of vessels, including fishing boats, offshore supply vessels, workboats, and recreational craft, delivering reliable power and smooth operation.

2. What essential parts are available for MG5065 maintenance?

Essential parts include the overhaul plate kit, gasket set, clutch plates, seals, oil strainers, oil filters, and pressure gauges.

3. What’s included in the overhaul plate kit?

The kit includes all brass friction plates, steel plates.

4. How quickly can I get my MG5065 parts?

Diesel Pro Power offers 24-hour worldwide shipping, ensuring you receive your parts quickly, wherever you are.

5. Are Diesel Pro’s aftermarket parts reliable?

Yes! Our parts are engineered to meet or exceed OEM standards, providing long-lasting performance at a competitive price.

6. How do I know which parts I need for my MG5065?

Our website makes it easy to find parts specific to your engine. For guidance, you can also contact our customer support team for expert assistance.

7. What are signs that my MG5065 transmission needs service?

Look for fluid leaks, slipping gears, unusual noises, overheating, or reduced performance, which may indicate the need for maintenance or repairs.

8. Do you offer technical support?

Absolutely! Our team offers expert support, including troubleshooting guidance and advice on part selection and installation.

9. What payment and shipping options are available?

We offer secure online ordering, and most parts are processed and shipped within 24 hours with international shipping available.

10. How do I place an order?

Browse our Twin Disc MG5065 parts catalog online, select the items you need, and complete your order securely. Contact us with any questions during the process.

Get Started with MG5065 Parts Today

Choose Diesel Pro Power as your trusted source for Twin Disc MG5065 marine transmission parts. Whether you’re planning routine maintenance or a major overhaul, we have the parts you need and the expertise to support you every step of the way. Browse our catalog today and experience the Diesel Pro Power difference.

Marine Transmission Specifications & Applications of the Twin Disc MG5065

Overview of the Twin Disc MG5065 Marine Transmission

The Twin Disc MG5065 is a compact, lightweight, and reliable marine transmission engineered for medium-duty commercial and recreational applications. With a hydraulically actuated, oil-cooled multi-disc clutch and a proven geartrain, the MG5065 delivers smooth engagement and durable performance across a variety of marine propulsion environments.

Designed to operate with marine diesel engines in the 250–400 horsepower range, the MG5065 is especially well-suited for workboats, patrol boats, pilot craft, and mid-size fishing vessels. Available with both straight and down-angle output options, this transmission is ideal for space-constrained engine rooms where performance and dependability are essential.

Key Specifications of the Twin Disc MG5065

• Type: Marine transmission with hydraulic clutch

• Horsepower Rating (Approximate):

• Continuous Duty: Up to 300 HP @ 1800 RPM

• Intermittent Duty: Up to 400 HP @ 2300 RPM

• Maximum Input Speed: 2500 RPM

• Reduction Ratios Available:

• 1.51:1

• 1.93:1

• 2.48:1

• 2.96:1

• 3.52:1

• Input Housing: SAE No. 2 or SAE No. 3

• Flywheel Compatibility: 11.5", 14"

• Clutch Type: Oil-cooled, hydraulically actuated multi-disc clutch

• Cooling System: Standard oil-to-water heat exchanger; oil-to-air cooler optional

• Lubrication System: Internal oil pump with pressure-fed lubrication

• Oil Capacity: Approximately 6–8 quarts depending on configuration

• Dry Weight: Approximately 375–450 lbs

• Mounting Options: Available in straight or down-angle output

• Rotation Compatibility: Bi-directional; supports both left-hand and right-hand engine rotation

• Optional Features:

• Hydraulic or mechanical PTO

• Trolling valve for low-speed operation

• Flexible or rigid mounts

Common Marine Applications for the MG5065

The MG5065 is designed for vessels that demand reliable power transmission with minimal footprint and simplified maintenance. It is commonly found in:

• Pilot and Patrol Boats: Trusted for quick shift response, ease of maintenance, and long service intervals.

• Inshore Fishing Vessels: Widely used in lobster, crab, and gillnet boats operating in moderate sea conditions.

• Tour and Passenger Boats: Ensures smooth, quiet propulsion for sightseeing, shuttle, or ferry operations.

• Utility and Crew Boats: A solid choice for harbor workboats, tenders, and small cargo carriers.

• Recreational Cruisers and Sportfishing Boats: Ideal for repowers and new builds in the 35–50 ft range.

Most Common Engine Models Paired with the Twin Disc MG5065

The MG5065 is frequently paired with mid-sized marine diesel engines that fall within the 250–400 horsepower range. It accommodates SAE No. 2 and No. 3 housings and integrates easily with the following platforms:

Cummins Marine Engines

• Cummins 6BT / 6BTA 5.9

• Cummins QSB 5.9

• Cummins QSB 6.7
  Well-matched for coastal patrol and workboat applications, these engines provide ample torque and are widely supported.

John Deere Marine Engines

• John Deere 4045TFM75

• John Deere 6068SFM50
  These engines pair well with MG5065 transmissions in commercial and municipal service boats due to their torque delivery and fuel efficiency.

Caterpillar Marine Engines

• Caterpillar 3116 / 3126

• Caterpillar C7 (mid ratings)
  Popular in tour boats and repower projects, these engines provide consistent torque across the MG5065 gear ratio range.

Yanmar Marine Engines

• Yanmar 6LY2 / 6LY3 Series
  Used in fast-response commercial boats and sportfishing vessels, these compact engines work well with the MG5065 in weight-sensitive builds.

Detroit Diesel Marine Engines

• Detroit Diesel 6V53 (light-duty ratings)
  Often used in legacy platforms and refits, these engines are compatible with MG5065 in vessels where original transmissions have failed or require upgrading.

Advantages of the Twin Disc MG5065

• Hydraulic Clutch Design: Oil-cooled, multi-disc clutch ensures smooth engagement and extended service life.

• Flexible Ratio Options: Multiple reduction choices for optimal propeller performance and hull matching.

• Compact & Lightweight: Ideal for smaller engine compartments and vessels with strict space or weight limits.

• Dependable Performance: Suitable for demanding daily operation across a range of marine environments.

• Ease of Maintenance: Straightforward service access and strong aftermarket support via Diesel Pro Power.

Ideal Use Cases for the MG5065

Vessel Type	MG5065 Suitability	Comments
Patrol & Harbor Boats	Excellent	Fast shifting and reliable under variable load
Inshore Fishing Vessels	Excellent	Withstands daily use with mid-power diesel engines
Passenger Tour Boats	Excellent	Quiet, smooth shifting for frequent maneuvering
Crew and Utility Boats	Excellent	Good fit for small commercial support vessels
Tugboats and Pushboats	Not Recommended	Use higher-rated gearboxes for heavy towing
Offshore Trawlers	Not Recommended	MG5065 is not rated for deep-sea continuous heavy-duty work