Free - Twin Disc MG-507 Troubleshooting Guide Parts for Twin Disc ® MG507 Marine Transmissions - Oil Pump Section Loading... 1 Twin Disc Oil Pump for Marine Gear MG507, MG507-1 & MG507A . Price: $ 530.30 Qty: ^ Pictures In Stock Add to Cart 2 Twin Disc Oil Pump Gasket for MG502, MG506, MG507 (new style) . Price: $ 8.48 Qty: ^ Details In Stock Add to Cart Go Back Free - Twin Disc MG-507 Troubleshooting Guide