Twin Disc MG 540 Marine Gear

Palmer Johnson is North America’s leading distributor for all of your Twin Disc MG-540 (MG540) 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-540 transmission, we’ve got you covered. Contact us today and you’ll be back up and running in no time!


Standard Equipment

  • Vertical offset, cast iron housing
  • SAE J617 housing no. 0
  • Electric GP-valve with manual override
  • EC050 Profile module – interface for engagement signals
  • Oil strainer and oil filter
  • Companion flange/bolt set


  • SAE J617 housing no. 00
  • Flexible coupling for 18” flywheel (SAE J620 size 460)
  • Flexible coupling for 21” flywheel (SAE J620 size 530)
  • Input flange for freestanding installation
  • Mechanical control valve
  • Harness with single point interface to Twin Disc EC300 control system
  • Oil cooler for raw or fresh water cooling
  • Special companion flange/bolts set for shaft brake application
  • Monitoring devices to customer’s specification
  • Mounting brackets

Contact Us

Maximum 1180 kW (1582 HP) @ 1800 RPM [continous duty]

Twin Disc Logo

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.