Hardin Marine

3/4" NPT Stainless Steel Pipe Plug
Your Price:
$16.99

3/4" NPT Stainless Steel Pipe Plug

540-222999

316L Stainless Steel Fitting
3/4" NPT Pipe Plug

We Offer the most complete line of chrome plated brass and custom fabricated stainless steel fittings available anywhere. All of these fittings are sure to simplify your plumbing job and add a tasteful finishing touch.


3/4" NPT Stainless Steel Water Shut-Off Valve
Your Price:
$59.90

3/4" NPT Stainless Steel Water Shut-Off Valve

620-913320

3/4" Stainless Steel Full-Port Ball Valve

FNPT by FNPT Threaded Ends, 2-Piece Body, Full-Port Design with lockable handle, 1000 PSI rated, 316 Stainless Steel Body, Teflon (PTFE) Seals & Seats.


3/4" NPT X 1" Hose Barb Fitting
Your Price:
$21.95

3/4" NPT X 1" Hose Barb Fitting

625-4407

3/4" NPT X 1" Hose Barb Fitting

This fitting is an aluminum version of 540-222110. Shown here threaded into water outlet which is not included.
Sold each.

3/4" NPT x 1" Push On Hose Composite Fitting - Long
Your Price:
$4.99

3/4" NPT x 1" Push On Hose Composite Fitting - Long

540-224020

3/4" NPT x 1" Push On Hose Composite Fitting, Long,  2-1/2" Overall

3/4" NPT x 1" Push On Hose Composite Pipe Plug
Your Price:
$5.99

3/4" NPT x 1" Push On Hose Composite Pipe Plug

540-224005

3/4" NPT x 1" Push On Hose Composite Pipe Plug, 2" overall length

3/4" NPT x 1" Push On Hose Composite Pipe Plug - 90 Degree
Your Price:
$6.99

3/4" NPT x 1" Push On Hose Composite Pipe Plug - 90 Degree

540-224010

3/4" NPT x 1" Push On Hose Composite Pipe Plug, 90 Degree

3/4" Marine Bilge Hose

Your Price:
$1.49

3/4" Pro-Flex Marine Bilge Hose

100-1034 + Option(s)

3/4" I.D Pro-Flex Marine Bilge Hose

This hose is designed to go from your bilge pump to your water dump It is flexible and easy to route.

  • 2.5:1 RATIO FROM FULLY EXTENDED TO COLLAPSED
  • AVAILABLE IN CONTINOUS PIECES UP TO 75FT
  • RETAINS USER'S DESIRED SHAPE
  • SPACE SAVER AND FLEXIBILITY
  • LIGHTWEIGHT AND CRUSH PROOF
  • PUNCTURE RESISTANT ABRASION RESISTANT AND MINIMUM FLEX STRESS
  • PROPRIETARY POLYOLEFIN COPOLYMER FORMULATION BLENDING PROCESS THAT ENSURES PRODUCT CONSISTENCY
  • CUSTOM COLORS AVAILABLE SOON - CURRENTLY ONLY BLACK AVAILABLE
  • TEMP RANGE -40 TO 160 F
  • MADE IN USA

Water bilge hose is sold by the foot, i.e add quantity of 6 for 6 ft. of hose.


3/4" Right Hand Male Rod End
Your Price:
$86.99

3/4" Right Hand Male Rod End

135-3434R

3/4" Right Hand Male Rod End

These rod ends are all stainless steel.


3/4" Round Tapered Cast Aluminum Steering Shaft Adapter
Your Price:
$19.99

3/4" Round Tapered Cast Aluminum Steering Shaft Adapter

620-243160

3/4" Round Tapered Cast Aluminum Steering Shaft Adapter

These cast aluminum steering shaft adapters feature a 3-3/4" O.D with a 3/4" round shaft provision while providing the popular 3-bolt steering wheel mount.  The unit is 1-1/4" tall. These offer an economical choice for steering wheel mounting and have a low profile. Center line on the three bolt holes is 1-3/4"

This shaft adapter is designed to have a 3-bolt wheel and cap directly mounted to it and isn't for use with any of our standard 3 to 5/6/9 bolt steering wheel adapters without modification.

We offer a very wide selection of steering wheel adapters to fit most popular applications.  What you need to know before you purchase your new steering wheel is just what type of steering post or helm that your boat utilizes. The most common styles are a round 3/4" tapered shaft with a keyway or a square style shaft without a keyway.  Most of the steering wheels available are sold without a mounting provision.  That's where billet steering wheel adapters come in.  If your boat currently has a steering wheel that is mounted to a 3-bolt adapter you would need to purchase the appropriate steering wheel adapter, which will bolt to the steering wheel and then to your flange adapter.

Note: This adapter does not have a polished finish in the center section, however this will not be visible when installed.

Need help installing your new shaft adapter? Check out this handy tutorial!


1/2" Water Pressure Dump
Your Price:
$115.99

3/4" Stainless Steel In Line Pressure Relief Valve Water Dump

128-5016

This has to be one of the coolest and simplest stream lined inventions to come along in recent times. High water pressure spikes plague numerous boats and cause catastrophic engine damage. Until now your only option was an independent pressure relief valve that you then had to plumb to a water dump to discharge the water. Thanks to the Hardin Marine team they have taken the best high flow water valve design and integrated it into a common water dump.

These dumps feature a sleek design as well as unique wrench flats machined into the body aiding in assembly during a one person installation. Constructed from 316L stainless steel. This model provides a 3/4 NPT female thread allowing for any arrangement of possible fitting and hose connections. The unit features a stainless tulip style valve that is spring loaded. The units come preset at approximately 10psi.

  • 1-3/4" Flange Diameter
  • 1/4" Flange Height 
  • 1-1/4" Shaft Outside Diameter
  • 4" Overall Length
  • 3/4" NPT Internal Thread
  • Pre-set at Aprox. 10lb Pressure Relief
  • Approx. Flow Rate (gallons per minute) 10 psi=7 GPM, 15 psi= 13 GPM, 20 psi=19 GPM

3/8" Copper Washer
Your Price:
$1.94

3/8" Copper Washer

90037SA-STCO

3/8" Copper Washer for Hardin or Mercruiser Gen 5/6 Sea Pumps

3/8" Marine Fuel Line Hose
Your Price:
$3.99

3/8" Marine Fuel Line Hose

100-350-0380

Marine Fuel Line Hose 3/8" I.D.

  • This is true USCG approved marine grade fuel hose
  • This is A-1 grade hose

Don't take any chances with your investment Use only marine grade hose.

Fuel line hose is sold by the foot, i.e add quantity of 6 for 6 ft. of hose.

Hose comes in maximum of 50 feet sections. Please specify if you want sections cut into specific lengths when ordering over 50 feet.


1/4" Marine Vent / Bilge Hose
Your Price:
$1.29

3/8" Marine Vent / Bilge Hose

100-150-0386

3/8" I.D Vent / Bilge Hose

This hose is commonly used for venting or bilge dump.

Vent / Bilge hose is sold by the foot, i.e add quantity of 6 for 6 ft. of hose.

Hose comes in maximum of 50 feet sections. Please specify if you want sections cut into specific lengths when ordering over 50 feet.


3/8" NPT Flexible Dipstick Kit
Your Price:
$29.99

3/8" NPT Hardin Marine Flexible oil dipstick

620-910492

3/8" NPT Hardin Marine Flexible oil dipstick

A unique flexible dipstick tube assembly allows easy access and a universal fit, making it easy to work around marine exhaust systems. The pan must have a pipe thread provision to work with this dipstick.

20" Long Tube


3/8" NPT Stainless Steel Pipe Plug
Your Price:
$11.99

3/8" NPT Stainless Steel Pipe Plug

540-222997

316L Stainless Steel Fitting
3/8" NPT Pipe Plug

We Offer the most complete line of chrome plated brass and custom fabricated stainless steel fittings available anywhere. All of these fittings are sure to simplify your plumbing job and add a tasteful finishing touch.


3/8" Stainless Eyelet
Your Price:
$10.99

3/8" Stainless Eyelet

950-42175

3/8" Stainless Eyelet

These are high grade stainless eyelets in 3/8" diameters. The eyelets can also be used on the transoms or bow of boats for tie downs or tow hooks. 3" Thread Length. 4-1/2" Overall length. 1-1/2" pin center to center.


3/8" Exhaust Log Manifold Stud Kit
Your Price:
$49.99

3/8" Stainless Steel Exhaust Log Manifold Stud Kit

620-53105

3/8" Stainless Steel Exhaust Log Manifold Stud Kit

We offer a full selection of manifold bolt kits to fit most popular marine engines.  These kits come complete with (16) studs, nuts and washers. Studs are 1-3/4" Long.


3/8"-16 x 3/4" Stainless Allen Head Bolt
Your Price:
$1.99

3/8"-16 x 3/4" Stainless Allen Head Bolt

900-37-C075SHS

Replacement Bolt 3/8"-16 x 3/4" Stainless Allen Head

Used in many applications including Hardin Sand Strainers, Fuel Filters, Oil Filters, Thermostat Housings and more.


Gil Manifold 3" Exhaust Bolt
Your Price:
$1.75

3/8-16" x 4" Bolt

900-37C400HHS

3/8-16" x 4" Bolt. Used on Trim Tabs 

30 Ft. Boat Wiring Harness
Your Price:
$269.99

30 Ft. Boat Wiring Harness

620-08841

30 Ft. Boat Wiring Harness, Wired for Voltmeter and Mercury Style Cannon Plug

Wiring your boat does not have to be a hassle due to tangled wires, bad connections, and guess work. Poor wiring can ruin a boat. These boat harnesses use 275 degree, thermal crossed linked wire that will not kink and is abrasive resistant. Don’t take chances with your boat; trust the leader in marine wiring, Hardin Marine.

Note: Uses 14 AWG wire


302-351 Ford Windsor Valve Covers
Your Price:
$51.99

302-351 Ford Windsor Valve Covers

620-70751

302-351 Ford Windsor Valve Covers

These chrome plated steel valve covers feature a clean no-logo design. These are a great looking addition to any engine packag.e Not recommended in salt water applications. Sold in pairs.


302-351W Ford Stock Replacement Fuel Pump
Your Price:
$163.99

302-351W Ford Stock Replacement Fuel Pump

895-M6696

302-351W Ford Stock Replacement Fuel Pump

    Features:
  • Inlet Attachment: Female threads
  • Outlet Attachment: Female threads
  • 1976-93 Ford Marine 5.8L
This pump replaces your stock fuel pump and will provide years of trouble free service. High-performance flow (23 gph) with OE appearance and fit. They feature heavy-duty diaphragms, high-speed anti-float springs, full-flow valves, heat-treated levers & aluminum castings.

This Is A Block Mounted Fuel Pump


3-1/2" Angle Cut Exhaust Tip
Your Price:
$144.99

3-1/2" Angle Cut Exhaust Tip

410-281352

  • 3-1/2" Diameter.
  • Constructed of 316L Stainless Steel.
  • Tip includes internal flap.
  • Sold Each.
  • 45 Degree Angle Cut.
  • Use Silicone to seal to Transom.
  • Length 10-1/4", Flange to Inside End 5", Flange to Outside End 5-1/4".
  • The tips flange has an O.D 5-1/2".

3-1/2" Angle Cut Part-Time Transom Mounted Silencers
Your Price:
$499.99

3-1/2" Angle Cut Part-Time Transom Mounted Silencers

410-282351

3-1/2" Angle Cut Part-Time Transom Mounted Silencers

These silencers are 100% stainless steel and are perfect for both stock and slightly modified engines There are no moving parts and they come in a brilliant polished finish These silencers are called part-time because by simply removing one bolt per tip you can remove the slip-in silencers and have straight through exhaust Approximately an 8 to 10 decibel reduction is achieved with these silencers installed.

Available in your choice of straight or angle cut styles. All tips require a 4" mounting hole while providing the appropriate exhaust hose connection size.

Sold in pairs.


3-1/2" I.D Marine Water Certified Corrugated Exhaust Hose
Your Price:
$2.99

3-1/2" I.D Marine Water Certified Corrugated Exhaust Hose

100-252-3124

3-1/2" I.D Marine Water Certified Corrugated Exhaust Hose

This hose allows you to make only very slight bends due to its corrugated design used in extreme-duty applications. It has a reinforcing wire threaded through the wall to increase strength.

All exhaust hose is sold by the inch, i.e add quantity of 24 for 24 in. (2 ft.) of hose.

Hose comes in 12.5 feet sections. Specify if you want sections cut when ordering over 12 feet.

3-1/2" Marine Grade Hardwall Exhaust Hose
Your Price:
$2.99

3-1/2" Marine Grade Hardwall Exhaust Hose

100-250-3124

3-1/2" I.D Marine Grade Hardwall Exhaust Hose

This hose allows you to make only very slight bends due to its hardwall design used in extreme-duty applications. It looks exactly like the softwall hose except it has a reinforcing wire threaded through the wall to increase strength.

All exhaust hose is sold by the inch, i.e add quantity of 24 for 24 in. (2 ft.) of hose.

Hose comes in 12.5 feet sections. Specify if you want sections cut when ordering over 12 feet.


3-1/2" Marine Grade Soft Wall Exhaust Hose
Your Price:
$2.29

3-1/2" Marine Grade Soft Wall Exhaust Hose

100-200-3124

3-1/2" I.D Marine Grade Soft Wall Exhaust Hose

This is top quality soft wall exhaust hose It's pliable construction makes it easier to work with than hard wall hose.

All exhaust hose is sold by the inch, i.e add quantity of 24 for 24 in. (2 ft.) of hose.

Hose comes in maximum of 12.5 feet sections. Please specify if you want sections cut into specific lengths when ordering over 12 feet.