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Underwater Hardware

Wanting to upgrade your system's propellers? On the hunt for marine underwater connectors and cables? No matter what you're looking for, Discount Inboard Marine is sure to have the best prices on underwater hardware and accessories from the top manufacturers in the industry. From marine underwater mechanical cables to drive shaft seals, you'll find a vast selection of products perfect for any repair, replacement or overhaul. Discover why experienced boaters trust Discount Inboard Marine as their go-to inboard engine parts supplier. 

  • 14" X 20" LH OJ PROPELLER LH 1-1/8" BORE

    14" X 20" LH OJ PROPELLER LH 1-1/8" BORE

    14 X 20 LH, 1.5:1 Ratio Trans. Less RPM than 14X18. If you are just cruising around the lake this prop would be OK, not for a heavily loaded boats.   The Force by OJ Props welcome to the fourth dimension! The Force propeller is a breakthrough in...
    $505.00
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  • FORCE 14 X 18 RH 4 BLD 1-1/8

    FORCE 14 X 18 RH 4 BLD 1-1/8

    14 X 18 RH   The Force by OJ Props welcome to the fourth dimension! The Force propeller is a breakthrough in four-bladed prop design, brought to you by the leader in competition ski-boat propellers. Based on OJ’s original three-bladed Legend...
    $505.00
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  • FORCE 14 X 18 LH 4 BLD 1-1/8

    FORCE 14 X 18 LH 4 BLD 1-1/8

    Mastercraft with "Powerslot Transmission" (1.5:1 ratio) or standard V-drive applications.   The Force by OJ Props welcome to the fourth dimension! The Force propeller is a breakthrough in four-bladed prop design, brought to you by the leader in...
    $505.00
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  • FORCE 13 X 14 LH 4 BLD 1-1/8

    FORCE 13 X 14 LH 4 BLD 1-1/8

    Reduces rpm about 150/200 compared to a 13 X 13   The Force by OJ Props welcome to the fourth dimension! The Force propeller is a breakthrough in four-bladed prop design, brought to you by the leader in competition ski-boat propellers. Based on...
    $475.00
    Add to Cart
  • FORCE 13 X 13 LH 4 BLD 1-1/8

    FORCE 13 X 13 LH 4 BLD 1-1/8

    FORCE 4 BLADE   The Force by OJ Props welcome to the fourth dimension! The Force propeller is a breakthrough in four-bladed prop design, brought to you by the leader in competition ski-boat propellers. Based on OJ’s original three-bladed...
    $475.00
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  • FORCE 14 X 16 RH 4 BLD 1

    FORCE 14 X 16 RH 4 BLD 1

    89-96 Nautique with 1.23:1 gear.Our third most popular "Force" prop. Keeps RPM in check and has a solid pull.   The Force by OJ Props welcome to the fourth dimension! The Force propeller is a breakthrough in four-bladed prop design, brought to you...
    $492.00
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  • FORCE 13 X 14 RH 4 BLD 1

    FORCE 13 X 14 RH 4 BLD 1

    Correct Craft or Right Hand rotation boats with 454 (wakeboard) or High Torq 351. Drops about 150/200 rpms from 13 X 13.   OJ1239 FORCE 13 X 14 Propeller 4-Blade RH - Discount Inboard Marine   Bin Number (ISBN): 23105
    $475.00
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  • FORCE 13 X 14 LH 4 BLD 1

    FORCE 13 X 14 LH 4 BLD 1

    The OJ1233 13 x 14 Propeller 4-blade LH   The Force by OJ Props welcome to the fourth dimension! The Force propeller is a breakthrough in four-bladed prop design, brought to you by the leader in competition ski-boat propellers. Based on...
    $560.00
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  • FORCE 13 X 13 RH 4 BLD 1

    FORCE 13 X 13 RH 4 BLD 1

    Ski Nautique With 1:1 Trans.   The Force by OJ Props welcome to the fourth dimension! The Force propeller is a breakthrough in four-bladed prop design, brought to you by the leader in competition ski-boat propellers. Based on OJ’s original...
    $475.00
    Add to Cart
  • 13" X 13" PROPELLER 4 BLADE OJ 1216 LH 1" BORE

    13" X 13" PROPELLER 4 BLADE OJ 1216 LH 1" BORE

    Our most popular "Force" and a very common upgrade during the 90's for boats with small block engines and 1:1 transmissions. Supra, Moomba, Pre 92 Malibu, Mastercraft, Ski Supreme, pre 92 Brendella, etc.   The Force by OJ Props welcome to the fourth...
    $499.00
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  • FORCE 12.5 X 17 RH 4 BLD 1

    FORCE 12.5 X 17 RH 4 BLD 1

    Factory prop used on Correct Craft Ski Nautique 176, 12.5 was for hull clearance issues.   The Force by OJ Props welcome to the fourth dimension! The Force propeller is a breakthrough in four-bladed prop design, brought to you by the leader in...
    $480.00
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  • LEGEND 14 X 18 LH 3 BLD 1-1/8

    LEGEND 14 X 18 LH 3 BLD 1-1/8

    14 X 18 LH, 1-1/8" bore. The original "Powerslot" prop for Mastercraft's with 1.5 ratio transmissions.   The Force by OJ Props welcome to the fourth dimension! The Force propeller is a breakthrough in four-bladed prop design, brought to you by the...
    $449.00
    Add to Cart