Twin Disc MG-512 Marine Transmission Gear - Used Core

Twin Disc marine transmission / marine gear, chalk-marked "512 1.5" and consistent with the Twin Disc MG-500 series family. Complete assembly including bell housing, side-mounted control valve body and linkage, output drive flange, auxiliary drive pad, oil lines, and bolt-on lifting/support brackets. **Application:** Marine propulsion reduction gear for inboard diesel installations originally fitted with a Twin Disc MG-500 series gear. Exact model, ratio, rotation, and engine/bell-housing match are NOT verified from these photographs — the data plate must be read and cross-checked with Twin Disc before ordering. **Condition:** Used, untested long-term-storage take-out. Heavy paint flaking and surface rust on the case, flanges, and exposed gear teeth; dirt and oil staining throughout. Not run, not pressure-tested, and not bench-tested by us — best evaluated as a rebuildable core pending teardown and inspection. Gear oil will be drained and all open ports capped before shipping. Palletized freight only. Buyer must confirm fitment by part number, photos, dimensions, engine model, serial number, and application before purchase. Used marine part sold as-is unless otherwise stated. No returns on electrical, used, special-order, or installed parts.