Free - Twin Disc MG-506 Troubleshooting Guide Twin Disc MG 506 Marine Transmission Parts - Gear Bearing Kit Section Loading... 1 Bearing Kit for Twin Disc MG506 Marine Transmission Use for transmissions with ratios from 1.50 to 2.50 Price: $ 1,075.74 Qty: ^ Pictures In Stock Add to Cart 2 Twin Disc Gasket and seal kit for marine gear MG506 & MG506-1 . Price: $ 321.26 Qty: ^ Details In Stock Add to Cart Go Back Free - Twin Disc MG-506 Troubleshooting Guide