Free - Twin Disc MG-520 Troubleshooting Guide Twin Disc MG520 Marine Transmission Parts for Canada - Oil Pump & Filter Section Loading... 1 Breather for Twin Disc marine transmission MG509, MG514 . Price: $ 262.97 Qty: ^ Details In Stock Add to Cart 2 Twin Disc Oil Filter StraIner for Marine Gear MG514 Click Here for dimensions Price: $ 31.27 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-520 Troubleshooting Guide