GHmarine Outboard Water Pump Kit for Johnson Evinrude 60-75 HP — Complete Rebuild Kit with Impeller & Gaskets

GHmarine 432955 outboard water pump kit is a complete replacement set designed to restore cooling performance on Johnson and Evinrude 60–75 HP 3-cylinder outboard engines.

This kit includes all the parts needed to rebuild the water pump assembly so you can quickly return your outboard to reliable cooling operation. It replaces multiple OEM part numbers and fits common Johnson/Evinrude 3-cylinder models in the 60–75 horsepower range. The package contains the housing, pump cup, impeller, wear plate, seals, gaskets, bolts and small fittings, assembled to meet manufacturer-style specifications for seasonal maintenance.

How will this rebuild kit restore my boat's cooling system?

Replacing worn pump components ensures the impeller can push raw water through the engine at the correct flow and pressure. A fresh impeller, tight-fitting wear plate and correct gaskets reduce cavitation and overheating risk when installed properly.

• New impeller and wear plate recover pump efficiency.
• Housing and pump cup replace corroded or cracked parts.
• Seals and O-rings prevent leaks and maintain pressure.

Which engines and part numbers does this kit replace?

The GHmarine 432955 kit is engineered for Johnson and Evinrude 3-cylinder outboards rated 60, 65, 70 and 75 HP. It is supplied as a direct-style replacement for numerous OEM and aftermarket references so installation aligns with common repair routines.

• Fits Johnson/Evinrude 3-cylinder 60–75 HP models.
• Replaces Sierra 18-3389, Mallory 9-48213 and several Johnson/OMC numbers.
• Includes flywheel and impeller keys for correct alignment.

What parts are included and why each matters?

The kit bundles the critical components that typically wear out in a pump rebuild. Having all items matched in one package makes shop or field replacement faster and reduces the chance of missing a small but essential part.

• Pump housing and water pump cup — restore structural integrity and inlet geometry.
• Impeller and wear plate — primary moving parts that create water flow.
• Gaskets, seals, O-rings and grommets — prevent leaks and loss of suction.
• Fasteners, flywheel key and impeller key — ensure correct assembly and timing.

How often should I inspect or replace the impeller?

Regular checks each season help prevent in-season failures; impellers typically need replacement every two to three seasons depending on use and water conditions. Replace sooner if you notice cracking, missing vanes, or reduced cooling performance.

• Inspect impeller annually or before extended trips.
• Replace every 2–3 seasons or at first signs of wear.
• Follow manufacturer guidance for storage and winterization.

Who is this for: The GHmarine 432955 Outboard Water Pump Kit is intended for boat owners, marine mechanics and DIYers who maintain Johnson or Evinrude 60–75 HP 3-cylinder outboards. It's suitable when the existing pump shows wear, when performing routine seasonal maintenance, or when restoring an engine after corrosion or mechanical damage. The complete parts set is designed to simplify a standard pump rebuild without sourcing multiple individual components.