Hardin Marine

Square Flange Open Center Carburetor Base Gasket
Your Price:
$8.99

Square Flange Open Center Carburetor Base Gasket

300-54

Square Flange Open Center Carburetor Base Gasket - Fits Holley 4150/4160 & Edelbrock

These are our most popular carburetor base gaskets.


SS 5/16 Lock Washer
Your Price:
$0.55

SS 5/16 Lock Washer

90031SL-STSS

SS 5/16 Lock Washer for Hardin or Mercruiser Gen 5/6 Sea Pumps

SS Body, 2 Piece Pump Replacement
Your Price:
$159.99

SS Body, 2 Piece Pump Replacement

625-4063

SS Body, 2 Piece Pump Replacement

This SS Body, 2 Piece Pump Replacement is for the Hardin Marine stainless pump 625-4118.


Mercury Trim Pump & Stainless Steel Bracket Assembly for Trim Tabs
Your Price:
$659.99

SS Floor Mount Bracket & Trim Pump for Mayfair Trim Tabs

137-8207

  • For use with Mayfair Trim Pumps
  • 12v 3-Wire Trim Pump
  • Stainless Steel Floor Mount bracket.
  • Pump comes complete with solenoids.
  • Bracket is made of stainless steel  an upgrade from the factory steel bracket that rots out.
  • All stainless steel hardware is also included.
  • Uses 10w30 oil

Replacement Trim Pump & Stainless Steel Bracket For Mercury Stern Drives
Your Price:
$555.99

SS Floor Mount Bracket & Trim Pump for Mercury Bravo / Alpha Sterndrives (Early Style)

137-8201

  • Replaces Trim Pump Assembly for Bravo/Alpha Drives
  • Uses Early Style Bracket
  • Bracket is made from Stainless Steel
  • 12v, 3 Wire Trim Pump #137-8235
  • -4 Inverted Flare Fittings
  • Includes Solenoid and Wire Harness
  • High Pressure Pump, 2600 PSI Up, 600 PSI Down
  • Replaces Mercury Pump OEM #'s 14336A20, 14336A25, 14336A31, 865380A03, 865380A13
  • Replaces Mercury Bracket OEM #'s 42419A1, 862548A1
  • Replaces Mercury Assembly OEM #'s 14336A9, 14336A15, 14336A17, 14336A22, 14336A28, 865380A02, 865380A05, 865380A15, 865380A25

Replacement Trim Pump & Stainless Steel Bracket For Mercury Stern Drives
Your Price:
$499.99

SS Floor Mount Bracket & Trim Pump for Mercury Bravo / Alpha Sterndrives (Late Style)

137-8212

  • Replaces Trim Pump Assembly for Bravo/Alpha Drives
  • Uses Late Style Bracket
  • Bracket is made from Stainless Steel
  • 12v, 3 Wire Trim Pump #137-8235
  • -4 Inverted Flare Fittings
  • Includes Solenoid and Wire Harness
  • High Pressure Pump, 2600 PSI Up, 600 PSI Down
  • Replaces Mercury Pump OEM #'s 14336A20, 14336A25, 14336A31, 865380A03, 865380A13
  • Replaces Mercury Bracket OEM # 862548A1
  • Replaces Mercury Assembly OEM #'s 14336A9, 14336A15, 14336A17, 14336A22, 14336A28, 865380A02, 865380A05, 865380A15, 865380A25

SS Sport Series Tuning Kit For MerCruiser 454 & 502 Magnum MPI Engines
Your Price:
$659.99

SS Sport Series Tuning Kit For MerCruiser 454 & 502 Magnum MPI Engines

620-75305

"SS" Sport Series Tuning Kit For MerCruiser 454 & 502 Magnum MPI Engines

Do you want quicker acceleration, faster planing, and increased performance of up to 15 HP? If so, the "SS" Super Sport tuning kit for your MerCruiser Magnum MPI engine is what you need. This kit includes the "SS" Sport Series flame arrestor that utilizes a clamp-on style K&N element with our high velocity style air inlet. This kit include re-programming of your factory ECU in which we will modify both the fuel and spark curves as well as increasing your rev limiter and injector timing to 5400 RPM. This kit also comes with an adjustable billet Flow Command fuel pressure regulator that allows you to tune your air fuel mixture for optimum performance.

NOTE: You will need to send us your ECU with this questionnaire for re-calibration.

***Results will vary depending on boat design, propping, atmospheric conditions, environment and drivers. We cannot guarantee speed or plane time increases with the many different applications. MPH and power increase % are helpful rules of thumbs and are in no way guaranteed.


SS Super Sport Loader Scoop for JC, JG, JI Pumps
Your Price:
$239.99

SS Super Sport Loader Scoop for JC, JG, JI Pumps

620-103113

"SS" Super Sport Loader Scoop for JC, JG, JI Pumps

This is a fabulous loader scoop. With virtually hundreds of hours of research and development Hardin Marine has come up with the new "SS" Super Sport loader scoop. This unit is designed for the performance jet boat enthusiast with 375 to 500 horsepower. The long inlet ramp design forces water to the top of the impeller where it's needed, to load your jet pump for maximum thrust efficiency.


"SS" Super Sport Loader Scoop for JE & JF Pumps
Your Price:
$199.99

SS Super Sport Loader Scoop for JE & JF Pumps

620-103114

"SS" Super Sport Loader Scoop for JE & JF Pumps

This is a fabulous loader scoop. With virtually hundreds of hours of research and development Hardin Marine has come up with the new "SS" Super Sport loader scoop. This unit is designed for the performance jet boat enthusiast with 500 + horsepower. The long inlet ramp design forces water to the top of the impeller where it's needed, to load your jet pump for maximum thrust efficiency.


SS Super Sport Series Flame Arrestor
Your Price:
$195.99

SS Super Sport Series Flame Arrestor for Mercury 454/502 Mag

620-12664

"SS" Super Sport Series Flame Arrestor For MerCruiser 454/502 Magnum MPI 

Hardin Marine and K&N Engineering have teamed up to bring you an affordable entry level performance filter/flame arrestor kit that bolts directly to your Mercury Magnum series engine throttle body. The expanding shape of this intake assures increased air speed, something that block-like aluminum adapters can't do. Just clamp on the K&N flame arrestor and you're ready to go. Serpentine and V-Belt Engine Compatible.

Note: These clamp-on filter/flame arrestors have limitations to their air flow capability. The filter element can only support enough air flow for approximately 500 horsepower.

Includes the mounting bolts.


Stainless -10 AN Thru-Hull Water Pick-Up
Your Price:
$85.99

Stainless -10 AN Thru-Hull Water Pick-Up

410-WP2510

  • -10 AN male fitting.
  • Highly Polished Stainless Steel.
  • Cut length to match the bottom of your boat.

Stainless -12 AN Steel Bulkhead Fitting
Your Price:
$89.99

Stainless -12 AN Steel Bulkhead Fitting

410-WP3512

  • -12 AN male fitting.
  • Constructed of 316L Stainless Steel.
  • Fits many Applications.
  • 2" max transom thickness
  • 1.250" diameter mounting hole
  • 2.5" x 2.5" mounting plate
  • 1/4" holes in plates
  • -12 inlet
  • .600" ID
  • 4.375" overall length

Stainless -12 AN Thru-Hull Water Pick-Up
Your Price:
$79.99

Stainless -12 AN Thru-Hull Water Pick-Up

410-WP2512

  • -12 AN male fitting.
  • Highly Polished Stainless Steel.
  • Cut length to match the bottom of your boat.

Stainless -16 AN Steel Bulkhead Fitting
Your Price:
$104.99

Stainless -16 AN Steel Bulkhead Fitting

410-WP3516

  • The overall length: 4 1/2"
  • The mounting flanges are: 2 1/2" square
  • The mounting flange is: 1/8 thick
  • The bolt pattern is: 1 7/8" square
  • -16 AN male fitting.
  • Constructed of 316L Stainless Steel.
  • Fits many Applications.

Stainless -16 AN Thru-Hull Water Pick-Up
Your Price:
$79.99

Stainless -16 AN Thru-Hull Water Pick-Up

410-WP2516

  • -16 AN male fitting.
  • Highly Polished Stainless Steel.
  • Cut length to match the bottom of your boat.

Stainless Cable Thru-Hull Fitting, 45 Deg
Your Price:
$59.99

Stainless 33C Cable Thru-Hull Fitting, 45 Deg

620-336175

Stainless 33C Cable Thru-Hull Fitting, 45 Deg

Incorporating an o-ring seal, this cable thru-hull is the easiest and cleanest way to route your cable without having to goop it up with tons of silicone. 3/8" ID Seal Bushing. 1/2" ID on external nut. 15/32" ID on internal hole in base. Fits 33C Cables.


Stainless -8 AN Thru-Hull Water Pick-Up
Your Price:
$79.99

Stainless -8 AN Thru-Hull Water Pick-Up

410-WP2508

  • -8 AN male fitting.
  • Highly Polished Stainless Steel.
  • Cut length to match the bottom of your boat.

Stainless Clip For Cavitation Hardware - 5/16" Keeper Only
Your Price:
$0.99

Stainless Clip For Cavitation Hardware - 5/16" Keeper Only

500-0485

Stainless Clip For Cavitation Hardware - 5/16" Keeper Only

Pins and clips sold separately


Custom Handcrafted Stainless Fitting 1" NPT To 1-1/4" Straight
Your Price:
$67.99

Stainless Fitting 1" NPT To -16 AN Straight

540-222191

316L Stainless Steel Fitting
1" NPT To -16 AN Straight

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.


Custom Handcrafted Stainless Fitting 1" NPT To 1-1/4" Straight
Your Price:
$95.99

Stainless Fitting 1" NPT To -20 AN Straight

540-222192

316L Stainless Steel Fitting
1" NPT To -20 AN Straight

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.


Custom Handcrafted Stainless Fitting 1" NPT To 1-1/4" Straight
Your Price:
$189.99

Stainless Fitting 1" NPT To -24 AN Straight

540-222193

316L Stainless Steel Fitting
1" NPT To -24 AN Straight

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.


Stainless Fitting 1-1/4 NPT X -20 90 DEG
Your Price:
$159.99

Stainless Fitting 1-1/4 NPT X -20 90 DEG

540-222197

316L Stainless Steel Fitting
1-1/4 NPT X -20 90 DEG

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.


Custom Handcrafted Stainless Fitting 1" NPT To 1-1/4" Straight
Your Price:
$79.99

Stainless Fitting 1-1/4" NPT To -20 AN Straight

540-222194

316L Stainless Steel Fitting
1-1/4" NPT To -20 AN Straight

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.


Stainless Head Mount Ignition System Bracket
Your Price:
$139.99

Stainless Head Mount Ignition System Bracket

620-09004

  • Brushed stainless steel.
  • Mount an MSD, Max Volt or Crane spark box to the top.
  • Has locations for your 50 amp breaker, starter solenoid, and factory Mercury cannon plug.
  • Factory Mercury Cannon Plug can exit from the side or back of the bracket.\
  • Includes Instructions, also available on our website.
  • Supplied with 3/8" mounting hardware for aftermarket or LTE Model BBC Engines
  • Note: May Interfere with Factory Y-Pipe.

Stainless Pins & Retainer Rings - 3/8"
Your Price:
$5.99

Stainless Pins & Retainer Rings - 3/8"

500-0478

Stainless Pins & Retainer Rings - 3/8"


Stainless Steel "Lifetime" Sea Pump Overhaul Kit
Your Price:
$239.99

Stainless Steel "Extreme" Sea Pump Overhaul Kit

625-4178

Stainless Steel "Extreme" Sea Pump Overhaul Kit

Finally a Sea Water Pump repair kit designed to do the job once and for all and will last a lifetime. Hardin Marine has designed an all new 316L stainless steel water pump impeller housing to replace the cheap factory plastic style housings used on original equipment applications. These impeller housings won't corrode, erode, or crack and fall apart like original equipment units. The one piece rear impeller housing features a unique rear housing that has 1" NPT female inlet/outlet ports so that a wide range of fitting and hose connections can be used for ease of installation. If your looking to do this job once and for all this could possible be the last sea water pump repair kit you ever buy look no further as this is the finest direct replacement sea pump repair kit on the market today.

The kit includes:

  • O-rings
  • Impeller
  • Stainless Wear Plates
  • Polished Stainless Steel Sea Pump Body
  • Bolts, Nuts & Washers

This kit replaces:

  • Quicksilver – 46-72744-A32
  • Mercury – 46-807151A14
  • Mercruiser – 46-807151-A2
  • Mercury – 46-807151-A8
  • Mercury – 46-807151-A9
  • Sierra - 18-3150

Note: Requires Fittings. See related items.

See here for individual replacement parts.


Stainless Steel "Soft Touch" Heavy Duty Quick Release Pin Style Fender Cleat
Your Price:
$89.99

Stainless Steel "Soft Touch" Heavy Duty Quick Release Pin Style Fender Cleat

620-142326

Stainless Steel "Soft Touch" Heavy Duty Quick Release Pin Style Fender Cleat

  • Deck hole size: 3/4"
  • Base Diameter: 1-1/2"
  • Pin Size: 1/2"

Take the sting (discomfort really) out of using traditional quick pin fender cleats. Traditional pic cleats have small button in the center that is known to poke in to your thumb while operating them. These new soft touch cleats feature beautifully polished dome shaped top the makes installing/removing your cleats a breeze while providing a finished appearance to their installations. These are the king of quick pin cleats! Made from tough 316L Stainless Steel, these cleats are built to last. Easy single handed operation. Twice the diameter of other brands. Sold each.

*** NOT INTENDED FOR MOORING ***