Twindisc mg5020sc

Palmer Johnson is North America’s leading distributor for all of your Twin Disc MG-5020SC (MG5020SC) marine gear transmission needs. Whether you are needing a replacement marine gear transmission, parts to do the repair yourself, or if you are wanting the factory trained technicians of PJ’s service department to rebuild your Twin Disc MG-5020SC transmission, we’ve got you covered. Contact us today and you’ll be back up and running in no time!

MG-5020 SC

Standard Equipment

  • Vertical offset, cast iron housing
  • Mechanical control valve
  • Oil strainer


  • SAE J617 housing no. 3
  • SAE J617 housing no. 4
  • Borg Warner housing
  • 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

Contact Us

Maximum 257 kW (345 hp) @ 3600 RPM [Pleasure Craft]

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Authorized Distributor

Palmer Johnson is an authorized distributor and service provider for Twin Disc products.

Genuine Parts

Thousands of parts ready to ship in as little as two hours from our store at

Service and Support

Seven master rebuild centers, ten full-service centers, and an extensive dealer network to serve you.