Multi-Stage Water Pumps - Triple Stage Sea Water Pumps

3 Stage Stainless Steel Sea Pump
Your Price:
$1,019.99

3 Stage Stainless Steel Sea Pump

625-4980

3 Stage Stainless Steel Sea Pump

Our 3 stage Extreme sea pump is unsurpassed in the marine industry and is the number one choice of the most recognized engine builders and offshore racers in the world today!

Designed to incorporate the same features and the single and dual stage pumps, the addition of one more impeller allows for maximum water flow to be passed through the engine while the third impeller is dedicated to cooling the intercooler only. Dyno testing has shown that dedicating an individual water flow thru the intercooler does indeed increase horsepower. The triple stage Extreme pump allows you to accomplish this without sacrificing valuable cooling water in the engine itself. This pump is custom configured to your individual needs.


3 Stage Stainless Steel Sea Pump with 1 Groove Pulley, Single 1-1/4” NPT Front Inlet & 3 Single 1”NPT Outlets
Your Price:
$1,449.99

3 Stage Stainless Steel Sea Pump with 1 Groove Pulley, Single 1-1/4" NPT Front Inlet & 3 Single 1" NPT Outlets

625-4981

3 Stage Stainless Steel Sea Pump with 1 Groove Pulley, Single 1-1/4” NPT Front Inlet & 3 Single 1”NPT Outlets

Our 3 stage Extreme sea pump is unsurpassed in the marine industry and is the number one choice of the most recognized engine builders and offshore racers in the world today!

Designed to incorporate the same features and the single and dual stage pumps, the addition of one more impeller allows for maximum water flow to be passed through the engine while the third impeller is dedicated to cooling the intercooler only. Dyno testing has shown that dedicating an individual water flow thru the intercooler does indeed increase horsepower. The triple stage Extreme pump allows you to accomplish this without sacrificing valuable cooling water in the engine itself. This pump is custom configured to your individual needs.


3 Stage Stainless Steel  Sea Pump with 1 Groove Pulley, Single 1-1/4” NPT Front Inlet & Single 1” NPT / 1-1/4 NPT Rear Exit Common
Your Price:
$1,529.99

3 Stage Stainless Steel Sea Pump with 1 Groove Pulley, Single 1-1/4" NPT Front Inlet & Single 1" NPT / 1-1/4 NPT Rear Exit Common

625-4983

3 Stage Stainless Steel Sea Pump with 1 Groove Pulley, Single 1-1/4” NPT Front Inlet & Single 1” NPT / 1-1/4 NPT Rear Exit Common

Our 3 stage Extreme sea pump is unsurpassed in the marine industry and is the number one choice of the most recognized engine builders and offshore racers in the world today!

Designed to incorporate the same features and the single and dual stage pumps, the addition of one more impeller allows for maximum water flow to be passed through the engine while the third impeller is dedicated to cooling the intercooler only. Dyno testing has shown that dedicating an individual water flow thru the intercooler does indeed increase horsepower. The triple stage Extreme pump allows you to accomplish this without sacrificing valuable cooling water in the engine itself. This pump is custom configured to your individual needs.


3 Stage Stainless Steel Sea Pump with 2 Groove Pulley, Single 1-1/4” NPT Front Inlet & 3 Single 1”NPT Outlets
Your Price:
$1,479.99

3 Stage Stainless Steel Sea Pump with 2 Groove Pulley, Single 1-1/4" NPT Front Inlet & 3 Single 1" NPT Outlets

625-4991

3 Stage Stainless Steel Sea Pump with 2 Groove Pulley, Single 1-1/4” NPT Front Inlet & 3 Single 1”NPT Outlets

Our 3 stage Extreme sea pump is unsurpassed in the marine industry and is the number one choice of the most recognized engine builders and offshore racers in the world today!

Designed to incorporate the same features and the single and dual stage pumps, the addition of one more impeller allows for maximum water flow to be passed through the engine while the third impeller is dedicated to cooling the intercooler only. Dyno testing has shown that dedicating an individual water flow thru the intercooler does indeed increase horsepower. The triple stage Extreme pump allows you to accomplish this without sacrificing valuable cooling water in the engine itself. This pump is custom configured to your individual needs.


3 Stage Stainless Steel  Sea Pump with 2 Groove Pulley, Single 1-1/4” NPT Front Inlet & Single 1” NPT / 1-1/4 NPT Rear Exit Common
Your Price:
$1,552.99

3 Stage Stainless Steel Sea Pump with 2 Groove Pulley, Single 1-1/4" NPT Front Inlet & Single 1" NPT / 1-1/4 NPT Rear Exit Common

625-4993

3 Stage Stainless Steel Sea Pump with 2 Groove Pulley, Single 1-1/4” NPT Front Inlet & Single 1” NPT / 1-1/4 NPT Rear Exit Common

Our 3 stage Extreme sea pump is unsurpassed in the marine industry and is the number one choice of the most recognized engine builders and offshore racers in the world today!

Designed to incorporate the same features and the single and dual stage pumps, the addition of one more impeller allows for maximum water flow to be passed through the engine while the third impeller is dedicated to cooling the intercooler only. Dyno testing has shown that dedicating an individual water flow thru the intercooler does indeed increase horsepower. The triple stage Extreme pump allows you to accomplish this without sacrificing valuable cooling water in the engine itself. This pump is custom configured to your individual needs.


2 Stage Stainless Rear Cap / Bearing Upgrade
Your Price:
$349.99

3 Stage Generation 2 Front Pump Housing with Shaft, Bearings and Seals

625-4227

3 Stage Generation 2 Front Pump Housing with Shaft, Bearings and Seals

2 Stage Stainless Rear Cap / Bearing Upgrade
Your Price:
$329.99

3 Stage Stainless Rear Cap / Bearing Upgrade

625-4164

3 Stage Stainless Rear Cap / Bearing Upgrade

The latest in multi-stage pump design has again advanced. All current series Hardin multi stage sea pumps now feature this roller bearing tail shaft design. If you have an earlier bushing styled tail shaft pump it can now easily be upgrades to the later version with one of our kits. This kit includes a new pump shaft, bearing, seal, and new stainless steel rear cover plate.

Basic Triple Stage Sea Pump Service Kit
Your Price:
$229.99

Basic Triple Stage Sea Pump Service Kit

625-4182

Basic Triple Stage Sea Pump Service Kit

These kits consist of all the basic service related parts needed to rebuild a Hardin Marine Multi-Stage sea pump as well as many other multi-stage pumps on the market today. Each kit comes with the necessary sealing o-rings, impeller, and stainless steel wear plates.


3 Stage Master Rebuild Kit Gen 1
Your Price:
$259.99

Hardin Triple Stage Gen. 1 Sea Pump Master Rebuild Kit

625-4168

Hardin Triple Stage Gen. 1 Sea Pump Master Rebuild Kit

Replace all the bearings, seals, o-rings, clips, wear plates and impellers on your Hardin Triple Stage Sea Pump.

Gen. 1 Pumps have Black, Hardcoated, Billet Aluminum Rear Covers.
Gen. 2 Pumps have Polished, Cast Stainless Steel Rear Covers with a bolt in the center. The name Hardin Marine is cast into the cover.


3 Stage Master Rebuild Kit Gen 2
Your Price:
$259.99

Hardin Triple Stage Gen. 2 Sea Pump Master Rebuild Kit

625-4171

Hardin Triple Stage Gen. 2 Sea Pump Master Rebuild Kit

Replace all the bearings, seals, o-rings, clips, wear plates and impellers on your Hardin Triple Stage Sea Pump.

Gen. 1 Pumps have Black, Hardcoated, Billet Aluminum Rear Covers.
Gen. 2 Pumps have Polished, Cast Stainless Steel Rear Covers with a bolt in the center. The name Hardin Marine is cast into the cover.


Factory Rebuild Of Triple Stage Pump With Polished Stainless Steel Body
Your Price:
$769.99

Factory Rebuild Of Triple Stage Pump With Polished Stainless Steel Body

625-4198

Factory Rebuild Of Triple Stage Pump With Polished Finish Stainless Steel Body

These sea pump upgrade kits are designed to provide the key components to repair or update most multi-stage pumps on the market today. Each kit consists of all of the components found in the basic overhaul kits as well as the addition of our super duty 316L stainless steel pump which provides the ultimate in corrosion resistance and durability. This is a factory rebuild of your pump. You will need to send your pump in to rebuilt. We will contact you with details when ordered.


Triple Stage Sea Pump Factory Rebuild
Your Price:
$529.99

Triple Stage Sea Pump Factory Rebuild

625-4192

Triple Stage Sea Pump Factory Rebuild

This is a factory rebuild of your pump. You will need to send your pump in to rebuilt. We will contact you with details when ordered.

SeaPump Master Rebuild Mercury Gen 3, 850/1075
Your Price:
$429.99

Sea Pump Master Rebuild Mercury Gen 3, 850 / 1075 / 1100 / 1350

625-4296

SeaPump Master Rebuild Mercury Gen 3, 850/1075

This kit fits:
  • 850 SCI: 0M957579 & UP
  • 1075 SCI: 0M905359 THRU OM957024 GEN 3 PUMP ONLY. 0M957032 & UP
  • 1025 SCI: ALL
  • 1100 QC4V: ALL
  • 1200 SCI: ALL
  • 1350 QC4V: ALL
  • 1650 QC4V: ALL