Free - Twin Disc MG-506 Troubleshooting Guide Parts for Twin Disc ® MG506 Marine Transmissions - Oil Pump Section 1 Twin Disc Oil Pump for Marine Gear MG506 Old style Price: $ 580.07 Qty: ^ Pictures In Stock Add to Cart 2 Twin Disc Oil Pump Gasket for MG506 old style . Price: $ 4.16 Qty: ^ Details In Stock Add to Cart 3 Twin Disc Oil Pump for Marine Gear MG506 New style Price: $ 725.25 Qty: ^ Pictures In Stock Add to Cart 4 Twin Disc Oil Pump Gasket for MG502, MG506, MG507 (new style) . Price: $ 8.48 Qty: ^ Details In Stock Add to Cart 5 Dipstick for Twin Disc MG506 marine transmission New style Price: $ 167.00 Qty: ^ Pictures In Stock Add to Cart Go Back Free - Twin Disc MG-506 Troubleshooting Guide