Hardin Marine

5/8" Marine Fuel Line Hose
Your Price:
$3.99

5/8" Marine Fuel Line Hose

100-350-0580

Marine Fuel Line Hose 5/8" I.D.

  • This is true USCG approved marine grade fuel hose /li>
  • This is A-2 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.


5/8" Marine Standard Water Hose
Your Price:
$2.99

5/8" Marine Standard Water Hose

100-130-0580

Standard Water Hose 5/8" I.D.

This hose is perfect for plumbing the cooling system for most boats.

Water 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.


5/8" Marine Vent / Bilge Hose
Your Price:
$0.99

5/8" Marine Vent / Bilge Hose

100-150-0586

5/8" 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.


5/8" Right Hand Male Rod End
Your Price:
$61.99

5/8" Right Hand Male Rod End

135-5858R

5/8" Right Hand Male Rod End

These rod ends are all stainless steel


5/8" Stainless Steel Right Angle Fuel Vent
Your Price:
$27.99

5/8" Stainless Steel Right Angle Fuel Vent

620-1025

5/8" Stainless Steel Right Angle Fuel Vent

These stainless steel fuel vents offer an almost completely flush finish leaving no protruding hardware. Each vent comes complete with nut and backing plate. This vent is perfect in harsh corrosive environments.


5/8" Stainless Steel Straight Fuel Vent
Your Price:
$26.99

5/8" Stainless Steel Straight Fuel Vent

620-1024

5/8" Stainless Steel Straight Fuel Vent

These stainless steel fuel vents offer an almost completely flush finish leaving no protruding hardware. Each vent comes complete with nut and backing plate. This vent is perfect in harsh corrosive environments. Flange O.D. is 1.820".


5/8" Stainless Steel Washer
Your Price:
$0.92

5/8" Stainless Steel Washer

900-62AN-STSS

5/8" Stainless Steel Washer.


5/8" Vent Adapter 90 Degree Angle Mount
Your Price:
$10.99

5/8" Vent Adapter 90 Degree Angle Mount

725-2700

5/8" Vent Adapter 90 Degree Angle Mount

Vent adaptors allow you to connect vent hoses from your valve covers or fuel pump to a flame arrestor assembly.


5/8" x 3/4" Valve Cover Vent Extension
Your Price:
$4.95

5/8" x 3/4" Valve Cover Vent Extension

620-70182

5/8" x 3/4" Valve Cover Vent Extension

This gold irridited valve cover vent extension is commonly used to vent crankcase emissions to your flame arrestor.


5/8-18" Stainless Steel Nylon Lock Nut - Half Height
Your Price:
$6.99

5/8-18" Stainless Steel Nylon Lock Nut - Half Height

900-62FN-HNSS

5/8-18" Stainless Steel Nylon Lock Nut - Half Height, Coarse Thread.


50 Amp Mercury Style Circuit Breaker
Your Price:
$49.99

50 Amp Mercury Style Circuit Breaker

755-3514

50 Amp Mercury Style Circuit Breaker

These breakers are the most common marine units used on factory style as well as aftermarket marine engines and harnesses. Be careful not to exceed the original amperage rating of your existing harness.


500 EFI Polished Thermostat Housing To Exhaust Stainless Steel Hard Lines
Your Price:
$475.99

500 EFI Polished Thermostat Housing To Exhaust Stainless Steel Hard Lines

755-4104

  • Designed specifically for the popular Mercury 500EFI engine package.
  • Replaces factory rubber hoses.
  • Kit includes four stainless steel tube lines.
  • Hose & Clamps sold separately.

500 EFI Tuned & Bored Throttle Body 1000CFM
Your Price:
$629.99

500 EFI Tuned & Bored Throttle Body 1000CFM

620-15530

500 EFI Tuned & Bored Throttle Body 1000CFM

Hardin Marine has taken your factory Mercury Racing EFI throttle body and combined their precision machining and tuning experience into a power producing option for all Mercury 500/525 EFI applications. High flow throttle bodies wake these engines up.

These “Monoblade” flow 1000 CFM to match Mercury’s 525HP EFI engine. The “Monoblade” has self lubricating bronze bushings for the shaft to rotate on, knife edged stainless steel throttle blade, Stock OEM sensors and throttle cable mounts in the original location. 25 HP gain is available with recalibration of the ecu and the throttle valve. Port matching to the plenum chamber and the center divider is required to be removed from the inlet of manifold allowing room for the throttle body blade to move freely.

Now that the units match the 525 efi size. This takes a 525 gasket where it mates to the manifold not the original o-ring that the 500s had. One bolt hole needs to be clearance d slightly once the gasket is laid on the throttle body. The front is machined and drilled/tapped 5/16 fine thread and now accepts the 525 flame arrestor.

Optional High Flow flame arrestor is suggested #625-5250

Note: You will have to remove and send in your throttle body to have this process done. This is not a shelf item. Please call our technical staff for any questions or assistance on the process.

Sold as an Exchange, $500.00 Core Charge.

500 Gallon Per Hour Bilge Pump
Your Price:
$29.99

500 Gallon Per Hour Bilge Pump

135-22502

500 Gallon Per Hour Bilge Pump

These Bilge Pumps are made in America, and are of top quality These pumps meet all necessary USCG requirements and are tested and specified by over 200 boat manufacturers.


500 GPH Cartridge Bilge Pump
Your Price:
$29.99

500 GPH Cartridge Bilge Pump

135-32503

500 GPH Cartridge Bilge Pump

Bilge pump cleaning and maintenance no longer call for complete disassembly. You can now leave the pump casing attached to both the boat and the hoses – assuming you own one of SPX Johnson Pump’s cartridge bilge pumps. Cartridge bilge pumps from SPX Johnson Pump can be removed for cleaning or replacement without the use of a single tool. Lift a tab on the top, give the cartridge a twist and pull it out; that’s all there is to it. The cartridge contains an all-in-one motor/impeller unit with no loose parts. The cartridge line is a further development of SPX Johnson Pump’s acclaimed bilge pumps, which have received highest ratings in many different independent tests over the years.

    Features & Benefits
  • All-in one motor/impeller unit
  • No tools needed for maintenance
  • Extremely energy efficient
  • Water cooled motor for long service life
  • Five models for fifferent capacity needs
  • Can be equipped with a float switch for automatic operation
  • Meets the strict international standard, ISO 8849 Marine
  • Made in the USA

Water Cooled For Extended Service
The cartridge pumps are manufactured in the United States and the new line encompasses five compact pumps, each for a different capacity need. All of them use remarkably little electricity for the amount of water they pump. Their improved, more efficient motors also provide increased service life, thanks in part to an ingenious solution which circulates the discharge water around the motor for cooling.


525 Mercury Replacement Header Gasket
Your Price:
$29.99

525 Mercury Replacement Header Gasket

755-6907

525 Mercury Replacement Header Gasket - Sold in Pairs

These gaskets are Graphite Impregnated designed to withstand the highest of temperatures on high horsepower applications. For those of you looking to do the job only once insist on Hardin Marine extreme-duty gaskets. Quite possibly the last gasket you’ll ever need.

Sold in Pairs


5-3/4" Hide-A-Helm Steering Wheel Adapter
Your Price:
$599.99

5-3/4" Hide-A-Helm Steering Wheel Adapter

137-9456

5-3/4" Hide-A-Helm Steering Wheel Adapter

If you've been fortunate enough to see inside some of the most elite powerboats in the world toady such as Nor-Tec and Outerlimits, then you've probably noticed the ultra-cool dual switachble hidden helms they have.  Hardin Marine developed this system with two thoughts in mind.  First, dual helm steering systems up to now used two mounted steering posts fixed to both sides of the dash.  When one wasn't being used it stuck out of the dash as a safety hazard similar to a human harpoon.  By relocating the steering post beneath the surface of the dash and covering it with a smooth billet cap you now have a part that is worthy of existence on a million dollar boat.  Secondly, the easy removal of the steering wheel allows it to be stowed and locked beneath the cabin.  No steering wheel, means less chance of your boat being stolen.


5-3/4" x 1-5/8" Tall Flame Arrestor, Aluminum
Your Price:
$37.99

5-3/4" x 1-5/8" Tall Flame Arrestor, Aluminum

690-571501A

5-3/4" OD x 1-5/8" Tall Flame Arrestor, Aluminum

This low profile USCG Approved flame arrestor is designed to fit all carburetors with a 5-1/8" air horn or neck. This unit has a 5-3/ 4" outside diameter and is 1-5/8" tall. This unit is constructed of aluminum and is not recommended for saltwater applications. This flame arrestor fits only the Quadrajet and Edelbrock 4bbl. carburetors it does not clear the Holley or Quickfuel J-tubes.


5-3/4" x 3" High Flame Arrestor, Aluminum
Your Price:
$32.99

5-3/4" x 3" High Flame Arrestor, Aluminum

690-573001A

5-3/4" x 3" High Flame Arrestor, Aluminum (will fit inside std. scoops)

These flame arrestors both feature an aluminum mesh style USCG Approved construction Each unit is designed to fit a standard 5-1/8" carburetor neck while their outside dimension is 5-3/4". The 3" tall version has no fuel fume vent and fits perfectly inside most aluminum scoops. While the other version is 4" tall and has a fuel fume vent provision.


5-3/4" x 4" High Flame Arrestor with Vent Tube, Aluminum
Your Price:
$39.99

5-3/4" x 4" High Flame Arrestor with Vent Tube, Aluminum

690-573010A

5-3/4" x 4" High Flame Arrestor with Vent Tube, Aluminum

  • Each unit is designed to fit a standard 5-1/8" carburetor neck
  • outside dimension is 5-3/4"
  • The 3" tall version has no fuel fume vent
  • The 4" tall and has a fuel fume vent provision
  • Outer Vent Tube Diameter: 1/4"

These flame arrestors both feature an aluminum mesh style USCG Approved construction Each unit is designed to fit a standard 5-1/8" carburetor neck while their outside dimension is 5-3/4". The 3" tall version has no fuel fume vent and fits perfectly inside most aluminum scoops. While the other version is 4" tall and has a fuel fume vent provision.
Outer Diameter on the vent tube is 1/4" to match the fuel pumps its designed to attach to.


5-Bolt Grant Style Billet Aluminum Steering Wheel Adapter

Your Price:
$59.99

5-Bolt Grant Style Billet Aluminum Steering Wheel Adapter

125-S-500 + Option(s)

5-Bolt Grant Style Billet Aluminum Steering Wheel Adapter

  • Made from Billet Aluminum and powder-coated. 
  • Adapter is 3-3/8" in Diameter and 1" Tall.
  • Designed to fit the 5-bolt Grant steering wheels with either the Momo or Dino Bolt pattern
  • Features a 3-bolt mounting flange and 5-bolt steering wheel mount. 
  • Each adapter includes a billet center cap which fits 2-1/8" cap hole.
  • Each adapter is supplied with stainless steel hardware.

4-1/2" Stainless Steel Exhaust Flappers
Your Price:
$429.99

6" Stainless Steel Exhaust Flappers

410-280166

6" Stainless Steel Exhaust Flappers (EACH)

Due to the popularity of these Hardin Marine handcrafted beautifully polished stainless steel exhaust flappers they have created the option for larger versions. The flappers feature and O-ring seal to eliminate the possibility of any noise from the flapper during normal operation.  This new flapper represents the ultimate in durability and finishing touch to your boats exhaust system. These units are manufactured from 316L Stainless Steel and a silicon seal  *NOTE they require a minimum of 1-1/2" of exhaust tip for adequate clamping and attachment. 

These units are SOLD EACH and are custom built and require 2-3 weeks for delivery!


6 Standard Steering Post Assembly
Your Price:
$438.99

6" Standard Steering Post Assembly

137-9121

Mayfair By Hardin Marine Helms - 6" Standard Steering Post Assembly

The construction of these race inspired billet aluminum helms feature an adjustable slip collar to accommodate different dash thicknesses while providing the ultimate in finished appearance.  These steering posts bolt directly to a Char-Lynn hydraulic helm.  Available in a dual steering wheel bolt pattern (Momo or Dino) or a conventional 3-bolt pattern.  Length is from the dash to the steering wheel mounting flange based on a 1" thick dash. Center steering wheel cover sold separately.


60" Trim Hose, Straight / 90 Degree Ends
Your Price:
$89.99

60" Trim Hose, Straight / 90 Degree Ends

137-8267

60 inch trim hose with one 90 degree and one straight hose end.

6-71 Thru 14-71 KE Cast Aluminum Superchiller Intercooler
Your Price:
$1,599.99

6-71 Thru 14-71 KE Cast Aluminum Superchiller Intercooler

755-5005

6-71 Thru 14-71 KE Cast Aluminum Superchiller Intercooler

 

Each Intercooler features a housing cast for the finest 356T Aluminum and then show polished. This is just the foundation of what makes the KE intercoolers superior. The heart of these units is in the cores and the inlet/outlet caps. The high-density aluminum core with its new 24 fin per inch core is nearly 40% more efficient than the previous 16 fin per inch 1st Generation intercoolers. KE exclusive 3/4" NPT direct flow billet hard anodized inlet and outlet covers and you have the best money can buy. Available for all popular 6-71 thru 14-71, 250, 256 and 420 superchargers.

This will not fit the Weiand intake manifold.


6-Bolt Billet Aluminum Steering Wheel Adapter For Gaffrig, Dino Or Hardin Marine Wheels

Your Price:
$47.99

6-Bolt Billet Aluminum Steering Wheel Adapter

125-S-600 + Option(s)

6-Bolt Billet Aluminum Steering Wheel Adapter - Momo and Dino Pattern

  • Made from Billet Aluminum and powder-coated. 
  • Adapter is 3-1/2" in Diameter and 1" Tall.
  • Designed to fit the 6-bolt steering wheels with either the Momo or Dino Bolt pattern
  • Momo bolt pattern 2-3/4" center to center across.
  • Dino bolt pattern 2-7/8" center to center across.
  • Fits Wheels made by Hardin Marine, Grant, Uflex, Livorsi and others.
  • Features a 3-bolt mounting flange and 6-bolt steering wheel mount. 
  • Each adapter includes a billet center cap which fits 2-1/8" cap hole.
  • Each adapter is supplied with stainless steel hardware.

6-Rib Serpentine Crankshaft Pulley for Big Block Chevy
Your Price:
$194.99

6-Rib Serpentine Crankshaft Pulley for Big Block Chevy

625-8176

6-Rib Serpentine Crankshaft Pulley for Big Block Chevy (Mercury HP500 Engine Spacing), Polished

These are billet crankshaft pulleys that are CNC precision machined from 6061 T-6 billet aluminum.  1-3/4" thick