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    Twindisc MG502 reverse gear 1.5,:1
    The Twin Disc MG502 is a reliable, high-performance marine transmission designed for pleasure yachts, fishing boats, and small workboats . It features a 10-degree down-angle output for, compact design, and identical ratios in forward and reverse, with ratios of 1.54:1, 2.00:1, and 2.47:1 available. Key specs include a maximum speed of 4,000 RPM (diesel) and 3.5 U.S. pints (1.7L) oil capacity.
    Key Features and Specifications
    • Performance: Designed for durability in harsh marine environments.
    • Design: Conical helical gears with oil-controlled clutch engagement.
    • Ratios: Available in 1.54:1, 2.00:1, and 2.47:1.
    • Speed: Maximum allowable input speed is 4,000 RPM for diesel engines and 4,200 RPM for gasoline engines.
    • Dimensions: Known for being lightweight and roughly half the length of comparable capacity transmissions.
    Maintenance and Troubleshooting
    • Oil Capacity: 3.5 U.S. pints (1.7L), excluding hoses and heat exchanger.
    • Common Issues: Overheating (check oil level/cooler), oil leaks (check seals), and engagement issues.
    • Components: Essential spare parts include bearings (input, output, clutch) and seal kits.
    Common Applications
    • Pleasure yachts and sportfishing boats.
    • Commercial fishing boats.
    • Small passenger ferries, tour boats, and harbor taxis.
    • Patrol and service vessels.
    Rebuilt units are available, typically with a 2:1 ratio.
    • Twin Disc MG-502 Transmission Specifications
      Available Ratios. 1.54:1, 2.00:1, 2.47:1. Oil Capacity. 3.5 U.S. pints (1.7L), plus hoses and heat exchanger. Oil Pump Capacity. 2...
      Diesel Parts Direct
    • Twin Disc MG502 Marine Transmission Parts - Diesel Pro
      Specifications of the Twin Disc MG-502 ... Typical Applications: Pleasure yachts and sportfishing boats. Charter boats and harbor ...
      Diesel Pro
    • Twin Disc MG502 Rebuilt Marine Transmissions – Now For Sale
      May 30, 2025 — Real-World Applications. The rebuilt MG502 units are trusted in: Commercial fishing boats. Recreational yachts. Patrol and service...
      Diesel Pro Power
    • Introduction for Twin Disc MG502 Marine Gear | Diesel Pro Power
      Mar 13, 2025 — The Twin Disc MG502 Marine Gear is an essential component for marine propulsion systems, designed to ensure reliable and efficient...
      Diesel Pro
    • MG-502
      Page 1. Model MG-502. and MG-502-1. Marine Transmissions. Torsional Drive Plate. MG-502. Minimum Axial Hub Length (See note be. Op...
      goldcoastpower.com
    • Essential Spare Parts List for Twin Disc MG502 Marine Gear
      Mar 13, 2025 — 2. Bearings. Bearing kit for Twin Disc MG502 marine transmission. Bearings play a critical role in reducing friction and ensuring ...
      Diesel Pro
    • Frequently Asked Questions (FAQ) About The Twin Disc ...
      Mar 13, 2025 — Possible causes include misaligned shafts, worn bearings, or insufficient lubrication. What should I do if the gearbox is overheat...
      Diesel Pro Power · Diesel Pro Power
      0:17
    • Twin Disc MG502 2:1 Transmission - Short Video - Diesel Pro Power
      Mar 26, 2025 — Core Deposit & Exchange (Rebuilt MG502) All rebuilt MG502 transmissions here are sold with a refundable core deposit. You'll recei...
      Diesel Pro Power
    • Twin Disc MG-502 Transmission Specifications
      Available Ratios. 1.54:1, 2.00:1, 2.47:1. Oil Capacity. 3.5 U.S. pints (1.7L), plus hoses and heat exchanger. Oil Pump Capacity. 2...
      Diesel Parts Direct
    • Twin Disc MG502 Marine Transmission Parts - Diesel Pro
      Specifications of the Twin Disc MG-502 ... Typical Applications: Pleasure yachts and sportfishing boats. Charter boats and harbor ...
      Diesel Pro
    • Twin Disc MG502 Rebuilt Marine Transmissions – Now For Sale
      May 30, 2025 — Real-World Applications. The rebuilt MG502 units are trusted in: Commercial fishing boats. Recreational yachts. Patrol and service...
      Diesel Pro Power
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    Twin Disc MG502 marine transmission ratio 1.54 to 1 - rebuilt
    Twin Disc MG502 marine transmission ratio 1.54 to 1 - rebuilt
    Diesel Pro Power
    Understanding the Twin Disc MG502 Marine Gear | Diesel Pro Power
    Understanding the Twin Disc MG502 Marine Gear | Diesel Pro Power
    Diesel Pro
    TWINDISC-MG502 MARINE used GEAR LH
    TWINDISC-MG502 MARINE used GEAR LH
    Used Diesel Engines | Detroit Diesel
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    On Sale Twin Disc MG502 Ratio 2.00 Marine Transmission ...
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    Twindisc MG502 reverse gear 1.5,:1
    Twindisc MG502 reverse gear 1.5,:1
    AB Marine Service
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    TWINDISC-MG502 MARINE used GEAR LH
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    Twindisc MG502 reverse gear 1.5,:1
    Twindisc MG502 reverse gear 1.5,:1
    AB Marine Service
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    Understanding the Twin Disc MG502 Marine Gear


    Diesel Pro
    https://dieselpro.com › blog › understanding-the-twin-dis...
    Diesel Pro
    https://dieselpro.com › blog › understanding-the-twin-dis...
    Mar 13, 2025 — The Twin Disc MG502 Marine Gear is an essential part of marine propulsion systems, designed for seamless transmission of engine power to the propeller . Read more
    mg502 from dieselpro.com

    Twin Disc MG-502 Transmission Specifications


    Diesel Parts Direct
    https://www.dieselpartsdirect.com › twin-disc-mg-502
    Diesel Parts Direct
    https://www.dieselpartsdirect.com › twin-disc-mg-502
    Twin Disc MG-502 Transmission Specifications: Available Ratios 1.54:1, 2.00:1, 2.47:1, Oil Capacity 3.5 US pints (1.7L), plus hoses and heat exchanger. Read more

    Twin Disc Marine MG-502 2.0:1 Ratio Marine Transmission ...


    eBay
    https://www.ebay.com › ... › Transmission & Components
    eBay
    https://www.ebay.com › ... › Transmission & Components
    Find many great new & used options and get the best deals for Twin Disc Marine MG-502 2.0:1 Ratio Marine Transmission Gear at the best online prices at eBay ...
    $4,950.00 · In stock · $299 delivery

    MARINE TRANSMISSIONS


    Trans Atlantic Diesels
    http://www.tadiesels.com › assets › docs › Twin_D...
    Trans Atlantic Diesels
    http://www.tadiesels.com › assets › docs › Twin_D...
    PDF
    MG·502 and MG·502·1. Power Train. Page 4. Often called "Work Boat Duty," these marine transmission applica tions are expected to operate con tinuously at full ... Read more
    4 pages

    MG-502


    goldcoastpower.com
    http://goldcoastpower.com › print_bro › name=tw...
    goldcoastpower.com
    http://goldcoastpower.com › print_bro › name=tw...
    PDF
    These units all have helical gears and torque capacity to accommodate most mid-range, high-speed diesels and high-per- formance gasoline engines. The MG-502-1 ... Read more

    Twin Disc MG502-1 - Cummins Marine Forum


    sbmar.com
    https://www.sbmar.com › ... › Marine Transmissions
    sbmar.com
    https://www.sbmar.com › ... › Marine Transmissions
    Mar 9, 2021 — I have twin 210hp 6BT Cum min s in a 35ft Riviera, port engine/trans has a slight rattle or chatter – i am thinking the torsional isolator springs mag have ... Read more

    Frequently Asked Questions (FAQ) About The Twin Disc ...


    Diesel Pro Power
    https://dieselpro.com › blog › frequently-asked-questions...
    Diesel Pro Power
    https://dieselpro.com › blog › frequently-asked-questions...
    Mar 13, 2025 — The Twin Disc MG502 is a marine transmission system designed for efficient power transfer from the engine to the propeller in various types of vessels. Read more

    Help with Twin Disc MG502


    The Hull Truth - Boating and Fishing Forum
    https://www.thehulltruth.com › ... › The Boating Forum
    The Hull Truth - Boating and Fishing Forum
    https://www.thehulltruth.com › ... › The Boating Forum
    Jan 16, 2014 — Either 30 wt or 40 wt depending on temps. Must use straight wt oil. In hotter environment better to use 40 wt or when gear runs above 150 IIRC. Read more

    Servicing Twin Disc MG-502


    Trawler Forum
    https://www.trawlerforum.com › ... › Power Systems
    Trawler Forum
    https://www.trawlerforum.com › ... › Power Systems
    Oct 30, 2016 — This service consist of draining the oil, cleaning a screen, then putting in new oil (all 3.5 pints). Then you start the engine and check the oil level. Read more
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