GHmarine Water Pump Kit for Johnson & Evinrude V4/V6/V8 85–300 HP — OEM‑Spec Complete Rebuild

GHmarine 5001594 water pump kit is a complete rebuild set designed to replace worn cooling components on Johnson and Evinrude V4, V6 and V8 outboards from 85 to 300 HP.

This kit gives you everything needed to restore the engine’s raw-water cooling system to factory-style operation. It matches OEM specifications for the listed part numbers and contains the housing, impeller, seals, fasteners and wear items that commonly fail in service. Use it during routine maintenance or when you notice reduced cooling, overheating, or lower-than-normal exhaust temperature.

How does this kit fit my Johnson or Evinrude outboard?

The GHmarine 5001594 kit is engineered as a direct replacement for many factory water pump assemblies. It lists compatibility with a wide range of Johnson and Evinrude V4, V6 and V8 engines across 85–300 HP models and replaces the referenced OEM and aftermarket numbers.

• Compatible models: Johnson/Evinrude V4, V6, V8, 85–300 HP range.
• Replaces OEM numbers: 5001594, 390768, 391637, 392750, 393082, 395060, 395062, 435447, 434421, 435929.
• Also replaces Sierra 18-3392 and REC5001594 equivalents.
• Includes correct housing and impeller to fit original mounting points.

What components are included, and why they matter?

This kit bundles the parts you would normally replace during a full water pump rebuild so you don’t have to source items separately. Each included piece addresses a specific wear or failure point in the pump assembly to restore proper flow and sealing.

• One pump housing and one pump cup for structural integrity and water routing.
• One impeller and impeller key for effective raw-water circulation.
• Wear plate, damper, and water seal to protect the engine from leaks and abrasion.
• All gaskets, O-rings, grommets, bolts and screws to complete installation without extra shopping.

When should I install this water pump kit?

Inspect the impeller and rubber components every season; replace them if you see cracking, missing vanes, or hardening. Generally, replace the impeller every two to three seasons or sooner if you run in abrasive or debris-filled water.

• Check impeller condition during annual winterization or spring commissioning.
• Replace sooner if you notice reduced cooling, engine overheating, or unusual exhaust color.
• Change seals and gaskets when performing a mid-life service to prevent leaks.
• Keep a spare impeller on board for extended trips in remote waters.

Who is this for: Boaters, mechanics and marinas who maintain Johnson or Evinrude outboards and need a reliable, OEM-spec replacement water pump rebuild kit. It’s suitable for DIYers comfortable with basic outboard service and professionals who demand a complete parts set that reduces downtime. Choose this kit when you want a single-purchase solution to restore cooling performance and protect the engine from overheating and water intrusion.