Free - Twin Disc MG-514B Troubleshooting Guide Twin Disc MG-514B Marine Transmission Parts - Seal Section Loading... 1 Front seal for Twin Disc marine gear MG514 A and B Input shaft seal Price: $ Qty: ^ Details In Stock Add to Cart 2 Rear seal for Twin Disc marine gear MG514 Output shaft seal Price: $ Qty: ^ Details 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 Fresh Water Pumps Detroit Diesel Cummins Caterpillar John Deere Free - Twin Disc MG-514B Troubleshooting Guide