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Used Gearboxes & Transmissions in Wisconsin, USA

  • Twin Disc MG514B 4.5:1 Pair-T2254

    Twin Disc MG514B 4.5:1 Pair-T2254

    • Manufacturer: Twin Disc
    • Model: MG-514

    We have excellent pair of used Twin Disc MG514B marine gears in 4.5:1 ratio. Can sell one or both. Call for more pictures and price indication.

    Onalaska, WI
  • Twin Disc MG516, 6:1-T2243

    Twin Disc MG516, 6:1-T2243

    • Manufacturer: Twin Disc
    • Model: MG-516

    Good used Twin Disc MG516 marine gear in 6:1 ratio. Gear has been spin-tested for proper operation and pressures. All is in good shape and working correctly.

    Onalaska, WI
  • Reintjes WAV4800 5:1 Rebuilt-T2202

    Reintjes WAV4800 5:1 Rebuilt-T2202

    • Manufacturer: Reintjes
    • Model: WAV

    We have one excellent condition Reintjes WAV4800 marine gear available with recent rebuild by Karl Senner Company, the US Distributor. Ratio is 5:1. Cap. of 5000hp at 900 or 1000rpm (EMD 20-710 and others!). Abso...

    Onalaska, WI
  • Twin Disc MG514C 3:1-T2252

    Twin Disc MG514C 3:1-T2252

    • Manufacturer: Twin Disc
    • Model: MG-514

    Good used running takeout of Twin Disc MG514C marine gear with torsional coupling and drive ring . This gear looks like brand new inside although the actual hours are unknown.

    Onalaska, WI
  • ZF Masson W3300 Gear 6.5:1-T2200

    ZF Masson W3300 Gear 6.5:1-T2200

    • Manufacturer: Masson
    • Model: W3300

    Great lower hour used ZF Masson marine gear in 6.5:1 ratio. Rated for 705hp at 1800rpm continuous-duty or 1000hp at 2100rpm intermittent-duty.

    Onalaska, WI
  • Twin Disc MG514B 2.5:1 Pair-T2206

    Twin Disc MG514B 2.5:1 Pair-T2206

    • Manufacturer: Twin Disc
    • Model: MG-514

    Pair available of Twin Disc MG514B models in 2.5:1 ratio. SAE#1 bell housing, mechanical shift. Good used running take-out condition and spin tested. Actual hours are unknown.

    Onalaska, WI
  • Twin Disc MG514C 2.5:1 Zero

    Twin Disc MG514C 2.5:1 Zero Hour-T2212

    • Manufacturer: Twin Disc
    • Model: MG-514

    Twin Disc MG514C available in hard to find 2.5:1 ratio. This is a zero-hour rebuilt gear with SAE#1 bell housing. Manual shift . Could install electric shift if necessary.

    Onalaska, WI

Overview

Marine gearboxes and transmissions transfer engine power to the propeller, provide reduction ratios, and enable forward, neutral and reverse functions. They include reduction gears, clutches, shaft couplings and mounting flanges built to handle torque, shaft alignment and marine corrosion. Buyers select units by matching engine RPM and torque, input/output spline sizes, ratio, mounting pattern and condition—new, rebuilt or OEM—plus spare-parts availability for the vessel.

FAQ

What should I check when buying a used marine gearbox?

Verify model and serial numbers, gear ratio, input/output spline count and diameters, mounting/flange pattern, signs of corrosion or water ingress, oil condition, backlash/play, service history and whether seals or bearings were replaced.

How should a heavy marine transmission be prepared and shipped?

Drain fluids, secure or cap openings to prevent contamination, block and brace on a skid, protect against salt and moisture, use certified lifting points, choose an experienced heavy-equipment carrier and insure the shipment.

What routine maintenance is vital for marine gearboxes?

Change gearbox oil at manufacturer intervals, inspect seals and bellows, check coupling alignment and shaft runout, monitor for unusual noise or vibration, replace sacrificial anodes if present, and log operating hours and service actions.