Underwater Gear

Keep your boat running smooth and tracking true with precision underwater gear from WaterSkis.com. Whether you're replacing a worn Mastercraft drive shaft, upgrading a Moomba rudder, or sourcing an exact-fit Supra strut, we carry genuine OEM and compatible parts built to match factory performance. This category includes critical inboard components like drive shafts, struts, rudders, and other hardware essential to your boat’s handling and power delivery.

Need to find the right part fast? Use our Boat Part Lookup Tool to identify inboard boat underwater gear for your exact year, make, and model—no guesswork required. We stock parts for top ski and wake brands, including Mastercraft, Moomba, and Supra, with quality you can trust in deep water or shallow turns.

For smooth rides and confident control, trust WaterSkis.com for the underwater gear that keeps your boat performing its best.

Filters
  • Product
  • Qty in Cart
  • Quantity
  • Price
  • Subtotal
  • Supra | Moomba Dripless Shaft Seal 1"
    Quick view

    Supra | Moomba Dripless Shaft Seal 1"

    Skiers Choice
    $299.99
    Dripless Shaft Seal - 1" Shaft If your dripless shaft seal has failed, get it repaired before you ruin your shaft. The Shaft Cap is required to installation. Use the boat part look up below to ensure you are purchasing the correct part for your boat...
    Add to Cart
    Qty in Cart: 0
    Quantity:
    Price:
    $299.99
    Subtotal:
    Add to Cart
  • Total: items /

Adding your products to cart

View Cart Continue Shopping