Free - Twin Disc MG-509 Troubleshooting Guide Parts for Twin Disc MG509 Marine Transmissions - Oil Cooler Section 1 Twin Disc Oil cooler for marine gears MG509, MG5090A, MG5111, MG5111A, MG5114, MG5114A . Price: $ 1,284.00 Qty: ^ Pictures In Stock Add to Cart 2 Twin Disc Oil pump for marine gear MG509 Oil pump for Twin Disc marine gear MG509 Price: $ 1,039.59 Qty: ^ Pictures In Stock Add to Cart 3 Twin Disc Oil Filter for MG509 Oil filter Price: $ 174.37 Qty: ^ Pictures In Stock Add to Cart 4 Breather for Twin Disc marine transmission MG509, MG514 . Price: $ 181.71 Qty: ^ Details In Stock Add to Cart Go Back Free - Twin Disc MG-509 Troubleshooting Guide