Free - Twin Disc MG-506 Troubleshooting Guide Twin Disc MG 506 Marine Transmission Parts for Canada - Ring Gear & Rubber Block Section Loading... 1 Twin Disc MG506, MG507 & MG507-1 Ring Drive A6816C Housing size SAE #2 Price: $ 1,066.11 Qty: ^ Details In Stock Add to Cart 2 Rubber block for Twin Disc marine gears A3905B . Price: $ 11.88 Qty: ^ Pictures In Stock Add to Cart 3 Mechanical Gauges Standard Mechanical Gauges with Alarm Electrical Gauges 12 Volts Electrical Gauges 24 Volts 4 Controls Cables & More... See All Control, Cables & More 5 Marine Water Pumps Detroit Diesel Cummins Caterpillar John Deere See All... 6 Engine Water Pumps Detroit Diesel Cummins Caterpillar John Deere Free - Twin Disc MG-506 Troubleshooting Guide