Free - Twin Disc MG-502 Troubleshooting Guide Twin Disc MG502 Marine Transmission Parts - Transmission Seal Section Loading... 1 Front seal for Twin Disc marine gear MG502 MA349 Input shaft seal Price: $ 43.95 Qty: ^ Details In Stock Add to Cart 2 Rear seal for Twin Disc marine gear MG502 MA350 Output shaft seal Price: $ 57.42 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 Engine Water Pumps Detroit Diesel Cummins Caterpillar John Deere Parts for Twin Disc® marine transmission MG502, marine transmission front and rear seals for Twin Disc® MG502. Free - Twin Disc MG-502 Troubleshooting Guide