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UNDERWATER GEAR

Underwater Hull Boat Parts

If you need underwater gear, My Inboard Marine is the right place for you. We carry drive shafts, nuts, wrenches, shaft systems, seals, struts, rudders, steering systems and parts plus so much more! All designed to withstand the harsh effects of long exposure to water. Whatever tools or parts you need for your boat, you can find it right here at My Inboard Marine.

If you have any questions pertaining to our products, feel free to contact us today at 803-766-8586 or email us at sales@myinboardmarine.com and we will respond to help. Purchase your underwater hull boat parts from us today!

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Prop Nut Brass Castle Nut For 1" or 1-1/8" Inboard Shafts Slotted Castle Nut
Prop Nut Brass Castle Nut For 1" or 1-1/8" Shafts Slotted Castle Nut
13%
$19.00 $21.95
Prop Nut Brass Castle Nut For 1" or 1-1/8" Inboard Shafts Slotted Castle Nut
$19.00 $21.95
Inboard Castle Nut - Fits 1" or 1-1/8" shafts. 3/4-10 thread Fits 1" or 1-1/8" shafts. This castle nut can be replaced with a Nylock...
Prop Nut Brass Castle Nut For 1-1/4" Inboard Shafts Slotted Castle Nut
Prop Nut Brass Castle Nut For 1-1/4" Shafts Slotted Castle Nut Prop Nut Brass Castle Nut For 1-1/4" Shafts Slotted Castle Nut
9%
$22.37 $24.69
Prop Nut Brass Castle Nut For 1-1/4" Inboard Shafts Slotted Castle Nut
$22.37 $24.69
Inboard Castle Nut - Fits 1-1/4" shafts. 7/8-9 thread
Prop Wrench A.R.E. 1-1/16 Inch x 3/4 Inch Fits All But NOT Correct Craft
Prop Wrench A.R.E. 1-1/16 Inch x 3/4 Inch Fits All But NOT Correct Craft
15%
$34.00 $39.95
Prop Wrench A.R.E. 1-1/16 Inch x 3/4 Inch Fits All But NOT Correct Craft
$34.00 $39.95
A.R.E.’s chrome nickel-plated prop wrench is laser cut from 1/4" steel and is offset for clearance. This wrench will NOT FIT Correct Craft. For Correct...
Prop Wrench A.R.E. 1-1/4" X 3/4" For All Correct Craft
Prop Wrench A.R.E. 1-1/4" X 3/4" For All Correct Craft
12%
$35.00 $39.89
Prop Wrench A.R.E. 1-1/4" X 3/4" For All Correct Craft
$35.00 $39.89
This wrench WILL FIT Correct Craft. Fits the "Castle Nut" and the 3/4" end fits the A.R.E. Ironman Prop Puller. For ALL OTHERS use Item ARE106 Helps remove the...
PSS Shaft Seal Installation Kit 1" T-Fitting Water Supply Kit
PSS Shaft Seal Kit 1" T-Fitting Water Supply Kit PSS Shaft Seal Kit 1" T-Fitting Water Supply Kit
23%
$50.00 $65.00
PSS Shaft Seal Installation Kit 1" T-Fitting Water Supply Kit
$50.00 $65.00
1" T-Fitting Quick install water supply KIT ONLY for the PSS Shaft Seals This kit COMES WITH the PSS Shaft Seal Kit if you purchase a PSS...
PSS Shaft Seal Installation Kit 1-1/4" T-Fitting Water Supply Kit
PSS Shaft Seal Kit 1-1/8" T-Fitting Water Supply Kit PSS Shaft Seal Kit 1-1/8" T-Fitting Water Supply Kit
12%
$75.00 $85.00
PSS Shaft Seal Installation Kit 1-1/4" T-Fitting Water Supply Kit
$75.00 $85.00
1+1/8" T-Fitting Quick install water supply KIT ONLY for the PSS Shaft Seals This kit COMES WITH the PSS Shaft Seal Kit if you purchase a PSS...
PSS Shaft Seal Installation Kit 1-1/8" T-Fitting Water Supply Kit
PSS Shaft Seal Kit 1-1/8" T-Fitting Water Supply Kit PSS Shaft Seal Kit 1-1/8" T-Fitting Water Supply Kit
23%
$50.00 $65.00
PSS Shaft Seal Installation Kit 1-1/8" T-Fitting Water Supply Kit
$50.00 $65.00
1+1/8" T-Fitting Quick install water supply KIT ONLY for the PSS Shaft Seals This kit COMES WITH the PSS Shaft Seal Kit if you purchase a PSS...
PSS Shaft Seal Kit 1" Diameter Drive Shafts Comes With Install Kit
PSS Shaft Seal Kit 1" Diameter Drive Shafts Comes With Install Kit PSS Shaft Seal Kit 1" Diameter Drive Shafts Comes With Install Kit
10%
$325.00 $360.00
PSS Shaft Seal Kit 1" Diameter Drive Shafts Comes With Install Kit
$325.00 $360.00
Fits all boats with 1" shaft and 1-3/4 length shaft log.  This kit COMES WITH the quick install kit; Item INSTKIT1.0X.37 Uses a Stainless Steel rotor that slides down...
PSS Shaft Seal Kit 1-1/8" Diameter Drive Shafts Comes With Install Kit
PSS Shaft Seal Kit 1-1/8" Diameter Drive Shafts Comes With Install Kit PSS Shaft Seal Kit 1-1/8" Diameter Drive Shafts Comes With Install Kit
32%
$325.00 $479.00
PSS Shaft Seal Kit 1-1/8" Diameter Drive Shafts Comes With Install Kit
$325.00 $479.00
Fits all boats with 1-1/8" shaft and 1-3/4 length shaft log.  COMES WITH the quick install kit; Item INSTKIT1.125X.37 Uses a Stainless Steel rotor that slides...
PSS Shaft Seal Kit For 1-1/4" Diameter Drive Shafts Comes With Install Kit
PSS Shaft Seal Kit For 1-1/4" Diameter Drive Shafts Comes With Install Kit PSS Shaft Seal Kit For 1-1/4" Diameter Drive Shafts Comes With Install Kit
11%
$355.00 $398.00
PSS Shaft Seal Kit For 1-1/4" Diameter Drive Shafts Comes With Install Kit
$355.00 $398.00
Fits all boats with 1-1/4" shafts This kit COMES WITH the quick install kit; Item INSTIKIT1.2X.37 Uses a Stainless Steel rotor that slides down the shaft and compresses the...
Puller for - Shafts - Bushings and Struts - The A.R.E. Slide Hammer Puller
Puller for - Shafts - Bushings and Struts - The A.R.E. Slide Hammer Puller Puller for - Shafts - Bushings and Struts - The A.R.E. Slide Hammer Puller
13%
$319.00 $368.00
Puller for - Shafts - Bushings and Struts - The A.R.E. Slide Hammer Puller
$319.00 $368.00
A.R.E. Shaft/Strut Bearing Puller The slide hammer design makes quick work of removing single-taper and double-taper drive shafts. Constructed of chrome-plated steel and features a...
Puller For Gimbal Bearings Sierra® 18-7920-2
Puller For Gimbal Bearings Sierra® 18-7920-2
22%
$340.56 $438.09
Puller For Gimbal Bearings Sierra® 18-7920-2
$340.56 $438.09
Gimbal Bearing Puller Sierra® 18-7920-2 Removes gimbal bearing from Mercruiser, OMC & Volvo Penta stern drives. Sierra gimbal bearing puller tool For use with Mercruiser,...
Retaining Nut Socket 1-1/16" The A.R.E. Drive Shaft Systems Fits 1" and 1-1/8" Shafts SYSSOCKET106
RETAINING NUT SOCKET 1-1/16" FOR THE A.R.E. DRIVE SHAFT SYSTEMS
14%
$25.00 $28.95
Retaining Nut Socket 1-1/16" The A.R.E. Drive Shaft Systems Fits 1" and 1-1/8" Shafts SYSSOCKET106
$25.00 $28.95
1-1/16" Socket with wrench flats. Needed when there is not enough room to get a regular socket/ratchet in between the couplers Fits 1" and 1-1/8"...
RETAINING NUT SOCKET 1-1/4" FOR THE A.R.E DRIVE SHAFT SYSTEMS
RETAINING NUT SOCKET 1-1/4" FOR THE A.R.E DRIVE SHAFT SYSTEMS
11%
$33.00 $36.99
RETAINING NUT SOCKET 1-1/4" FOR THE A.R.E DRIVE SHAFT SYSTEMS
$33.00 $36.99
1-1/4" Socket With Wrench Flats. The ARE retaining nut socket with wrench flats requires only 1" clearance to fit between the transmission and the coupling....
Rope Packing Standard Impregnated Flax Packing 3/16" WPT
3/16" Standard Wax Impregnated Flax Packing 3/16" Standard Wax Impregnated Flax Packing
13%
$3.49 $4.00
Rope Packing Standard Impregnated Flax Packing 3/16" WPT
$3.49 $4.00
3/16" Standard Wax Impregnated Flax Packing Sold Per Foot PLEASE ENTER THE QUANTITY for each foot of rope packing. If you need 1 foot, enter quantity of...
Rope Packing Standard Wax Impregnated Flax Packing 1/4" WPT Brand
1/4" Standard Wax Impregnated Flax Packing 1/4" Standard Wax Impregnated Flax Packing
14%
$3.48 $4.07
Rope Packing Standard Wax Impregnated Flax Packing 1/4" WPT Brand
$3.48 $4.07
1/4" Standard Wax Impregnated Flax Packing Sold Per Foot  PLEASE ENTER THE QUANTITY for each foot of rope packing. If you need 1 foot, enter...
Rudder - 1000-C803 - Rudder Coronado
Rudder - 1000-C803 - Rudder Coronado
30%
$1,045.00 $1,490.09
Rudder - 1000-C803 - Rudder Coronado
$1,045.00 $1,490.09
REPLACEMENT RUDDER Post 1.00" Diameter and 9-1/4" tall Blade Length is 11" tall Bottom of rudder is 4-1/4" Coronado For Rudder Port - CLICK HERE...
Rudder Algonac Cast 1000C803
Rudder Algonac Cast 1000C803 Rudder Algonac Cast 1000C803
23%
$1,145.00 $1,490.09
Rudder Algonac Cast 1000C803
$1,145.00 $1,490.09
REPLACEMENT RUDDER - POST AND RUDDER ONLY - KEYED FOR PORT Post 1" Diameter Blade Length is 11.5" tall LONG Side Blade Length is 8.5"...
Rudder Box Assembly Ski Boat - RBST1.00-SLOT-BRG
Rudder Box Assembly Ski Boat - RBST1.00-SLOT-BRG Rudder Box Assembly Ski Boat - RBST1.00-SLOT-BRG
33%
$399.55 $600.30
Rudder Box Assembly Ski Boat - RBST1.00-SLOT-BRG
$399.55 $600.30
Rudder BOX Assembly RPTNSLOTRBSTASSY RBST1.00-SLOT-BRG 4" X 4" Plate with 3/8" holes; slotted for easier installation! If you only need a Sealing Kit - CLICK HERE...
Rudder Box Assembly Ski Boat NJ Style RBST1.00NH-BRG
Rudder Box Assembly Ski Boat NJ Style RBST1.00NH-BRG Rudder Box Assembly Ski Boat NJ Style RBST1.00NH-BRG
33%
$399.55 $600.30
Rudder Box Assembly Ski Boat NJ Style RBST1.00NH-BRG
$399.55 $600.30
Rudder BOX Assembly RBST1.00NH-BRG 4" X 3-1/4" Plate with 3/8" holes; slotted for easier installation! If you need the complete rudder assembly - CLICK HERE...
Rudder Port Stuffing Box Body 1" Shaft Algonac OEM 2200 1
Rudder Port Stuffing Box Body 1" Shaft Algonac OEM 2200 1
32%
$229.00 $335.49
Rudder Port Stuffing Box Body 1" Shaft Algonac OEM 2200 1
$229.00 $335.49
STUFFING BOX FOR 1" SHAFT Algonac OEM 22001 Square Base Center to center of mounting holes is 2.5" Base size is 3.5" Square Bottom protrusion is...
Rudder Seal Kit 1" For Rudder Box Marine Hardware - RBST1.00-SEAL-KIT
Rudder Seal Kit 1" For Rudder Box Marine Hardware - RBST1.00-SEAL-KIT RUDDER SEAL KIT FOR RUDDER BOX MARINE HARDWARE - RBST1.00-SEAL-KIT
35%
$85.00 $131.55
Rudder Seal Kit 1" For Rudder Box Marine Hardware - RBST1.00-SEAL-KIT
$85.00 $131.55
MARINE HARDWARE RUDDER RENEW KIT Seal Kit fits 1998 and up Marine Hardware Rudders Only! Marine Hardware rudders are usually stamped with the letters "MH"...
Seal Kit Lower Unit Lower Unit Seal Kit 84-86 OEM BRP-0396352
Seal Kit Lower Unit Lower Unit Seal Kit 84-86 OEM BRP-0396352
5%
$61.00 $63.99
Seal Kit Lower Unit Lower Unit Seal Kit 84-86 OEM BRP-0396352
$61.00 $63.99
Lower unit seal kit for Johnson Evinrude O-Ring Seal Kit 25 HP 1984 25 Comm., 28 SPL, 30 SPL 1985-96  
Seal Kit Lower Unit Lower Unit Seal Kit for Johnson Evinrude OEM 18-2684
Seal Kit Lower Unit Lower Unit Seal Kit for Johnson Evinrude OEM 18-2684
7%
$31.00 $33.49
Seal Kit Lower Unit Lower Unit Seal Kit for Johnson Evinrude OEM 18-2684
$31.00 $33.49
Lower unit seal kit for Johnson Evinrude Sierra Kit Replaces Mallory 9-74105  
Items 49 to 72 of 122 total