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Underwater-Gear/Steering

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. 

  • STRUT SUPRA 15 DEGREE (SEF 1051L) L=LONG

    STRUT SUPRA 15 DEGREE (SEF 1051L) L=LONG

    Used on some Supra's with 454 and 1" shaft. Also used on some direct drive Moomba's with 1" shafts (not V-drive). Includes new strut bearings, Sunsport, Outback LS. *Careful, this is a SEF1051L, there is also an SEF1051 (C/O Outback and Boomerang) not on...
    $370.00
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  • STRUT, MALIBU 1997 UP

    STRUT, MALIBU 1997 UP

    A few late 1996 models may have this 16 degree strut, fits most 97 up Malibu and Axis boats but will NOT fit XTI or FXI models. The previous strut with 1-1/8" shaft used from 1993 thru 1996 was a 15.45 degree strut PT# MLBU000358 (special order)...
    $703.73
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  • STRUT, MASTERCRAFT 1986 UP 1-1/8 IN

    STRUT, MASTERCRAFT 1986 UP 1-1/8 IN

    8 Mounting holes 16 degree (Includes brass shelled rubber strut bearings). Fits 1986 up Mastercraft boats with powerslot or V-drive 1-1/8" shafts. Or, all 2003+ splined shaft. This is an aftermarket strut and will not have Mastercraft on the side...
    $703.73
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  • STRUT, MASTERCRAFT 1986 UP 1"

    STRUT, MASTERCRAFT 1986 UP 1"

    This strut measures 7-3/4" high from mounting base to bottom of the barrel at the prop end. This is an aftermarket strut and will not have Mastercraft on the side. Note: Replacement strut bushing outside diameter will now be 1" X 1-3/8" no longer 1"...
    $703.73
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  • STRUT MOOMBA/SUPRA 1-1/8 BORE 15 DEGREE

    STRUT MOOMBA/SUPRA 1-1/8 BORE 15 DEGREE

    Most V-drive Supra and Moomba V-drive thru 2022 with 1-1/8" shaft, has SEF1050 (15 degree) stamped into side. Includes new strut bearings. Boats 2023 and up use Pt#121306 (special order) Supersedes #121306 Bin Number (ISBN): 60813
    $384.90
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  • STRUT SUPRA 14 DEGREE, 1IN. SHAFT

    STRUT SUPRA 14 DEGREE, 1IN. SHAFT

    Includes Bushings, Comp, Some Mariah's and older Sunsport's (Should be stamped with a 14).   Includes strut bushings, fits Supra Comp, some Sunsports and Maria's. Old strut should be marked with a 14 on the side, has a 6-1/2" drop. The distance...
    $351.00
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  • STRUT CENTURION BOATS 1998 UP STRUT CENTURION BOATS 1998 UP

    STRUT CENTURION BOATS 1998 UP

    STSL 16 degree strut fits Centurion 1998+ boats with a 1-1/8" shaft. 6 hole bolt pattern and includes brass bushings. Will not replace STSL18581, for older Centurion struts call or email for availability  
    $703.73
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  • DRIVE SHAFT COUPLING BOLT SET

    DRIVE SHAFT COUPLING BOLT SET

    3/8-16 x 1-1/4" (Nylock nuts) S30400 stainless, Velvet Drive coupler and PCM 40 series. Not lomg enough for 2013 and newer PCM 80 series transmissions with 1/2" thick flanges.     Bin Number (ISBN): 2232
    $14.00
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  • KEY STRAIGHT BRASS

    KEY STRAIGHT BRASS

    1/4" SQ x 2" L Prop Key, may have to cut length to fit some newer boats. The chamfered or radius side goes towards the shaft and the straight edged side fits into prop.   Brass Key. D.I.M. has a large selection of nuts, keys, and cotter pins...
    $11.67
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  • NYLOCK PROP NUT 1-1/4" SHAFT NUTNYBR789

    NYLOCK PROP NUT 1-1/4" SHAFT NUTNYBR789

    Fits boats with 1-1/4" shaft (Not for 1" or 1-1/8" shaft). Nautique G-boats, some Malibu/Axis. Brass nut with nylon insert 7/8-9.   Nylock Prop Nut 1-1/4" Shaft | NUTNYBR789 | Discount Inboard Marine   Bin Number...
    $20.99
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  • PROP NUT, CC

    PROP NUT, CC

    Fits 1" or 1-1/8" shafts, the castle nut can be replaced with Nylock nut but will cover up the cotter pin hole (no longer need cotter), 3/4-10 thread.   OLD part # NUTSLBR3410   Bin Number (ISBN): 2004210
    $33.33
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