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Hardin Marine

Replacement O-Ring Kit for 620-300100 Crossover Kits
Your Price:
$3.23

Replacement O-Ring Kit for 620-300100 Crossover Kits

620-300101

Replacement O-Rings for later model 620-300100 crossover kits.


Filler Cap
Your Price:
$1.50

Replacement O-Ring, -16 AN for Oil Fill Cap

625-1916

Replacement O-Ring, -16 AN for Oil Fill Cap 620-154023


Replacement O-Rings for Polished Billet Aluminum Big Block Chevy Water Inlet Plates
Your Price:
$4.99

Replacement O-Rings for Polished Billet Aluminum Big Block Chevy Water Inlet Plates

125-457333

  • Big Block Chevy
  • Replacement O-Rings for 125-457330

Replacement O-Rings for Polished Billet Aluminum Small Block Chevy Water Inlet Plates
Your Price:
$4.99

Replacement O-Rings for Polished Billet Aluminum Small Block Chevy Water Inlet Plates

125-457323

  • Small Block Chevy
  • Replacement O-Rings for 125-457320

Replacement Plastic Bypass Valve
Your Price:
$10.99

Replacement Plastic Bypass Valve

540-160102

Replacement Plastic Bypass Valve for 540-160200, 540-160210 and 540-160465 Thermostat Kits.


Replacement Retainer Ring
Your Price:
$7.99

Replacement Retainer Ring

540-160105

Replacement Retainer Ring for 540-160200, 540-160210 and 540-160465 Thermostat Kits.


Replacement Rotor for Max Volt Distributor
Your Price:
$15.99

Replacement Rotor for Max Volt Distributor

121-1467

Replacement Rotor for Max Volt Distributor

Replacement Screen for Hardin Generation 2 Offshore Sea Strainer
Your Price:
$29.99

Replacement Screen for Hardin Generation 2 Offshore Sea Strainer

420-913216

Replacement Screen for Hardin Generation 2 Offshore Sea Strainer - 1/2" Shaft

Designed to fit Hardin Offshore Generation 2 (420-913222) Sea Strainers only.


Replacement Seal Kit for Mayfair Hydraulic Rams
Your Price:
$129.96

Replacement Seal Kit for Mayfair Hydraulic Ram

137-9248

This kit includes Seals and O-rings for replacing worn-out ones in a Mayfair hydraulic steering ram.
Includes instructions.

NOTE: Fits 100% of Production Year 2000 and above Mayfair Rams, may work on other rams but NO guarantee.


Replacement Seaward Series 8.1L / 496 Riser Install Kit
Your Price:
$59.99

Replacement Seaward Series 8.1L / 496 Riser Install Kit

620-38071

This kit contains the fittings and bolts to install a pair of risers on a 8.1L / 496 Mercrusier Seaward exhaust system.


Replacement Seaward Series Big Block Chevy Manifold Install Kit
Your Price:
$69.99

Replacement Seaward Series Big Block Chevy Manifold Install Kit

620-38032

This kit contains the fittings and bolts to install a pair of manifolds on a big block Chevy Seaward exhaust system.


Replacement Seaward Series Big Block Chevy Riser Install Kit
Your Price:
$69.99

Replacement Seaward Series Big Block Chevy Riser Install Kit

620-38036

This kit contains the gaskets, hoses and bolts to install a pair of risers on a big block Chevy Seaward exhaust system.


Replacement Seaward Series Small Block Chevy Manifold Install Kit
Your Price:
$59.99

Replacement Seaward Series Small Block Chevy Manifold Install Kit

620-38031

This kit contains the fittings and bolts to install a pair of manifolds on a small block Chevy Seaward exhaust system.


Replacement Seaward Series Small Block Chevy Riser Install Kit
Your Price:
$64.99

Replacement Seaward Series Small Block Chevy Riser Install Kit

620-38046

This kit contains the gaskets, hoses and bolts to install a pair of risers on a small block Chevy Seaward exhaust system.


Replacement Shaft for Gen 3 Mercury Racing 1075 / 1300 Sea Pump 840053
Your Price:
$399.99

Replacement Shaft for Gen 3 Mercury Racing 1075 / 1300 Sea Pump 840053

625-4139

Replacement Shaft for Gen 3 1075/1300 Mercury Racing Sea Pump. Replaces OEM Mercury #840053


Replacement Short Spacer for Hardin Generation 2 Offshore Sea Strainer
Your Price:
$3.99

Replacement Short Spacer for Hardin Generation 2 Offshore Sea Strainer

420-913214

Replacement Short Spacer for Hardin Generation 2 Offshore Sea Strainer - 1/2" Shaft

Designed to fit Hardin Offshore Generation 2 (420-913222) Sea Strainers only.


Replacement Silicone Seal (Gray In Color), 7" O.D.
Your Price:
$25.99

Replacement Silicone Seal (Gray In Color), 7" O.D.

620-906711

Replacement Silicone Seal (Gray In Color), 7" O.D.
  • Outer Diameter: 7"
  • Inner Diameter: 3"

These high temperature silicone seals slide on your tailpipe to provide a glove-like seal. SOLD EACH!


Replacement Silicone Seal For Transom Rings
Your Price:
$19.99

Replacement Silicone Seal For Transom Rings

620-906710

Replacement Silicone Seal For Transom Rings

The high temp silicone seal slides on to provide a glove-likeseal.   O.D. 5" 7/8


Replacement Spring
Your Price:
$8.99

Replacement Spring

540-160103

Replacement Spring for 540-160200, 540-160210 and 540-160465 Thermostat Kits.


Replacement Spring for Foot Throttles
Your Price:
$9.95

Replacement Spring for Foot Throttles

610-1010SP

Replacement Spring for Foot Throttles

This spring is used in Hardin Marine Foot Throttle Models 620-60213 & 620-60214.


Replacement Stainless Steel Mercury 850, 1075, 1200 SCi Thermostat Housing
Your Price:
$2,499.99

Replacement Stainless Steel Mercury 850, 1075, 1200 SCi Thermostat Housing

410-1526

Hardin Marine has done it again! This new all 316L stainless steel fabricated thermostat housing replaces the old, and no longer made cast aluminum units used in Mercury 850, 1075, 1200 SCi and other applications. Replaces Mercury #840047A02 and #8M0192206 housing and #849875T01 cover. Water inlet is -16 ORB. Circulation Hose bung is 1-7/8". All 4 header and tailpipe fittings are 3/4" NPT. You must reuse their original OEM ball and stud assembly in the tailpipe outlet. Includes 160 degree thermostat, O-rings and hardware needed to install. Fittings are sold separately see related parts.


Replacement Stainless Steel Trim Pump Bracket
Your Price:
$107.99

Replacement Stainless Steel Trim Pump Bracket - Late Model

525-17651

Replacement Stainless Steel Trim Pump Bracket - Late Model

The Hardin Marine new replacement Mercury trim pump bracket is a direct replacement for Mercury #862548A1. Made from high quality stainless steel this bracket will not rust and rot like factory OEM one.


Replacement Steering Ram Sticker
Your Price:
$7.00

Replacement Steering Ram Sticker

137-9274

Replacement sticker for Mayfair Steering rams


Replacement Thermostat for Thermostatic Oil Adapter
Your Price:
$129.99

Replacement Thermostat for Thermostatic Oil Adapter

625-7762

Replacement thermostat for 625-7704 adapter and all kits it is included in.

Replacement Threaded Drain Plug- Stainless Steel
Your Price:
$9.99

Replacement Threaded Drain Plug- Stainless Steel

620-06701

Stainless Steel Threaded Replacement Drain Plug

Lost your drain plug? Now you can replace your originals with the all new Hardin Marine stainless steel threaded boat drains. This is a threaded plug only. It will thread into the base of 620-06700. 1/2" NPT thread.

Supersedes: 160-31-0061-82


Replacement Top O-Ring for Hardin Sand Strainer
Your Price:
$2.50

Replacement Top O-Ring for Hardin Sand Strainer

625-1243

Replacement Top O-Ring for Hardin Sand Strainer

Designed to fit Hardin Sand Strainers only.


Replacement Transom Template - Mayfair Trim Tabs
Your Price:
$5.99

Replacement Transom Template - Mayfair Trim Tabs

137-8090

Replacement Transom Template Mayfair Trim Tabs. Printed on Large Format paper.

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