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Rebuild Kits & Parts - Hardin Gen 4 Sea Pumps

Mercury Gen 4 Sea Pump
Item No. Part Number Description Qty.
1 625-4063 Body, 2 Piece Replacement 1
2 625-4018 Wear Plate, Sea Pump 1
3 625-1026 O-Ring 1
4 625-4075 Housing, Bearing 1
5 625-4076 Shaft, Single Stage 1
6 625-4078 Bearing, Mercury Gen 4 Sea Pump 2
7 625-4079 Seal, Front - Sea Pump 1
8 625-4005 Seal, Sea Pump 2
9 90031AN-STSS Washer, 5/16 AN 5
10 90031C275-SHS Bolt - SHCS 5/16-18 x 2.75 1
11 90031C350-SHS Bolt - SHCS 5/16-18 x 3.50 4
12: Gen II 625-4265 Wear Plate, Internal 1
12: Gen I 625-4081 Wear Plate, Internal 1
13 625-4011 Impeller, Sea Pump 1
14: Gen II 625-1145 O-Ring 1
14: Gen I 625-1037 O-Ring 1
15 625-4077 Snap Ring 1

Hardin Gen 4 Sea Pump Versions
For Gen 4 Sea Pumps Description
625-4100 Gen 4 Stainless Steel Pump And Bracket Mercury Sea Pump Assembly - V-Belt
625-4103 Gen 4 SS Pump And Bracket Mercury Sea Pump Assembly - Serpentine - BBC
625-4105 Gen 4 Stainless Steel Mercury Pump Complete Assembly - SBC Applications
625-4106 Gen 4 Stainless Steel Mercury Sea Pump and Bracket - SBC Applications
625-4107 Stainless Steel SBC Mercury Pump Complete Assembly
625-4109 Gen 4 Stainless Steel Mercury Pump Complete Assembly - BBC Applications
625-4110 Mercruiser Gen 4 Lifetime Series Stainless Steel Sea Water Pump
625-4118 Mercruiser Gen 5/6 Replacement Lifetime Series Stainless Steel Sea Water Pump
625-4178 Stainless Steel "Lifetime" Sea Pump Overhaul Kit
Replacement Rebuild Kits Gen I Description
625-4173 Hardin Gen. 4, Rev. 1 Sea Pump Master Rebuild Kit
625-4179 Mercury Impeller Rebuild Service Kit for Hardin Pumps
Replacement Rebuild Kits Gen II Description
625-4174 Hardin Gen. 4, Rev. 2 Sea Pump Master Rebuild Kit
625-4189 Impeller Rebuild Service Kit for Hardin Gen. 4, Rev. 2 Sea Pumps
Bearing, Hardin Marine Gen 4 Sea Pump
Your Price:
$15.99

Bearing, Hardin Marine Gen 4 Sea Pump

625-4078

Bearing, Hardin Marine Gen 4 Sea Pump


Bolt, BHS 3/8-16 x 0.50
Your Price:
$2.49

Bolt, BHS 3/8-16 x 0.50

90037C050-BHS

Bolt, BHS 3/8-16 x 0.50



Bolt, SHCS 5/16-18 x 3.50
Your Price:
$2.59

Bolt, SHCS 5/16-18 x 3.50

90031C350-SHS

Bolt, SHCS 5/16-18 x 3.50



Bolt, SHCS, SS, 5/16-18x2.75
Your Price:
$1.99

Bolt, SHCS, SS, 5/16-18x2.75

90031C275-SHS

Bolt, SHCS, SS, 5/16-18x2.75



Gen 5/6 Sea Pump Vent Equalizer
Your Price:
$39.99

Gen 5/6 Sea Pump Vent Equalizer

625-4221

Gen 5/6 Sea Pump Vent Equalizer

This kit is designed to allow venting of pressure build up inside the Sea Pump housing that could create premature failure to be released through the existing fuel pump vent system.

Note will work with all sea pumps listed below that the front housing has been tapped for 1/8 NPT:

Merc Gen 4 Master Rebuild Plastic Body
Your Price:
$159.99

Hardin Gen 4. Sea Pump with Plastic Housing Master Rebuild Kit

625-4187

Master Rebuild Service Kit - For Gen. 4 Hardin Stainless Pumps with Plastic Rear Body - Mercury Replacement

This master kit is a rebuild service kit for the Hardin Marine stainless pump 625-4111. This kit comes with new wear plates , O-rings, seals, impeller, rear housing and retaining clip.


Hardin Gen 4 Master Rebuild Kit Gen 1
Your Price:
$149.99

Hardin Gen. 4, Rev. 1 Sea Pump Master Rebuild Kit

625-4173

Master Rebuild Service Kit - For Gen. 4, Rev. 1 Hardin Stainless Pumps - Mercury Replacement

This master kit is a rebuild service kit for the Hardin Marine stainless pump 625-4110. This kit comes with new wear plates , O-rings, seals, impeller and retaining clip.

Which Rebuild kit do I need?

Gen. 4, Rev. 1 pumps have a 1/8" drain plug in the rear housing and a slotted front wear plate.
Gen. 4, Rev. 2 pumps have no drain plug and a solid front wear plate.


Hardin Gen 4 Master Rebuild Kit - Gen 2
Your Price:
$149.99

Hardin Gen. 4, Rev. 2 Sea Pump Master Rebuild Kit

625-4174

Master Rebuild Service Kit - For Gen. 4, Rev. 2 Hardin Stainless Pumps - Mercury Replacement

This master kit is a rebuild service kit for the Hardin Marine stainless impeller housing 625-4178 and stainless pump 625-4110 . This kit comes with new wear plates , O-rings, seals, impeller and retaining clip.

Which Rebuild kit do I need?

Gen. 4, Rev. 1 pumps have a 1/8" drain plug in the rear housing and a slotted front wear plate.
Gen. 4, Rev. 2 pumps have no drain plug and a solid front wear plate.


Mercury Impeller Rebuild Service Kit
Your Price:
$59.99

Impeller Rebuild Service Kit for Hardin Gen. 4, Rev. 2 Sea Pumps

625-4189

Impeller Rebuild Service Kit - For Gen 4. Rev. 2 Hardin Stainless Pumps - Mercury Replacement

This impeller kit is a rebuild service kit for the Hardin Marine stainless impeller housing 625-4178 and stainless pump 625-4110 . This kit comes with new wear plates , O-rings, and impeller.

Which Rebuild kit do I need?

Gen 4. Rev. 1 pumps have a 1/8" drain plug in the rear housing and a slotted front wear plate.
Gen 4. Rev. 2 pumps have no drain plug and a solid front wear plate.

Mercury

This impeller kit is a rebuild service kit for the Hardin Marine stainless impeller housing 625-4178 . 

Kit includes:
  • (1)Impeller
  • (2) Wear Plate
  • O-rings

Hardin/Mercury Pump Shaft
Your Price:
$109.99

Mercury / Hardin Gen 4 Replacement Sea Pump Shaft (Mercrusier 59501A1)

625-4076

Heavy Duty Replacement shaft for Hardin or Mercruiser Gen 4 Sea Pumps. It replaces Mercruiser OEM # 59501A1.

Hardin/Mercury Pump Shaft
Your Price:
$219.99

Mercury / Hardin Gen 4 Replacement Sea Pump Snout Assembly

625-4104

Heavy Duty Replacement Snout Assembly for Hardin or Mercruiser Gen 4 Sea Pumps. Includes Snout Housing, Seals, Bearings, Snap Ring and Shaft.

Mercury Impeller Rebuild Service Kit
Your Price:
$59.99

Mercury Impeller Rebuild Service Kit for Hardin Pumps

625-4179

Impeller Rebuild Service Kit - For Gen 4, Rev. 1 Hardin Stainless Pumps - Mercury Replacement

This impeller kit is a rebuild service kit for the Hardin Marine stainless impeller housing 625-4178 and stainless pump 625-4110 . This kit comes with new wear plates , O-rings, and impeller.

Which Rebuild kit do I need?

Gen. 4, Rev. 1 pumps have a 1/8" drain plug in the rear housing and a slotted front wear plate.
Gen. 4, Rev. 2 pumps have no drain plug and a solid front wear plate.

Mercury

This impeller kit is a rebuild service kit for the Hardin Marine stainless impeller housing 625-4178 . 

Kit includes:
  • (1)Impeller
  • (2) Wear Plate
  • O-rings

O-Ring, Gen I
Your Price:
$2.50

O-Ring, Gen I

625-1145

O-Ring, Gen I


Custom Handcrafted Stainless Fitting 1" NPT To 1-1/4" Straight
Your Price:
$49.98

Pair of Cast Stainless Fitting 1" NPT To 1-1/4" Straight for Sea Pump Kits

540-222150

Pair of Cast 316L Stainless Steel Fittings
1" NPT To 1-1/4" Straight

These fittings are commonly used with Hardin Marine's Lifetime Sea Pumps and Rebuild Kits.
Use With:

Replacement Impeller For Mercury Sea Pumps
Your Price:
$32.99

Replacement Impeller For Mercury OEM and Hardin Sea Pumps

625-4011

  • Replaces Impellers on Hardin Ram Force, Multi-Stage, Lifetime Series Pumps.
  • D Shaped Shaft AKA "Single Flat"
  • 8 Vane Impeller
  • Replacement Impeller For Mercury OEM Sea Pumps
  • Replaces OEM Mercruiser # 47-59362T1

Seal, Front - Sea Pump
Your Price:
$14.99

Seal, Front - Sea Pump

625-4079

Seal, Front - Sea Pump


Snap Ring
Your Price:
$3.00

Snap Ring

625-4077

Snap Ring


Wear Plate, Internal - Gen I
Your Price:
$14.99

Wear Plate, Internal - Gen I

625-4081

Wear Plate, Internal - Gen I


Wear Plate, No Slot
Your Price:
$12.99

Wear Plate, No Slot

625-4265

Wear Plate, No Slot