SeaSierra outboard water pump impeller kit Model: 40-400HP for Mercury engines with wear plate seals and gaskets

If you maintain Mercury 4-stroke outboards from small center-console motors to high-powered Verado engines, this SeaSierra kit gives you the components needed to rebuild the lower unit water pump. The kit covers many models across the 40–400 HP range (including BigFoot and Verado families), and ships with both rotating and sealing parts so you can complete a service in one stop. All items are selected to match common OEM fitments and wear points so installation is straightforward for experienced DIYers and professional techs alike.

Which Mercury engines will this SeaSierra kit fit?

This kit is designed for a broad range of Mercury 4-stroke outboards. It fits BigFoot and many Verado configurations across multiple horsepower classes; check your engine serial/model to confirm exact fit before purchase.

• Designed for 40 HP EFI/Carb 4-cyl BigFoot and Command Thrust models
• Compatible with 45, 50, 60, 75, 80, 90, 100, 115 HP units
• Includes fitments for Verado 135–400 HP V4/V6 models (excludes 4.6L V8 variants)
• Also works with many high-performance and racing outboards listed by Mercury

What parts are included and why they matter?

The kit bundles the rotating impeller with the stationary wear and sealing components needed to restore pump performance. Replacing only the rubber impeller without the mating wear plate, seals or gaskets often leaves potential leak paths or improper clearances, so this full kit reduces repeat service.

• 1 x Water Pump Impeller (47-43026Q02) — main water-moving component
• Wear plate, seal face, seal, two drain gaskets and additional O-rings — restore sealing and clearances
• Key and gaskets included — ensures proper impeller timing and leak-free assembly
• Everything matched to Mercury OEM numbers for easier compatibility checks

How will this kit affect my maintenance routine?

Using a complete service kit simplifies a routine lower-unit water pump overhaul and helps prevent mid-season failures caused by worn seals or damaged wear plates. The included items let you follow manufacturer-recommended service intervals with a single parts purchase.

• Simplifies one-stop replacement for impeller and associated seals
• Reduces repeat disassembly by replacing wear components simultaneously
• Helps maintain proper cooling flow and internal clearances when installed correctly
• Ideal for scheduled preventive maintenance before heavy use or long trips

Who is this for: This SeaSierra 43026Q02 impeller service kit is aimed at boat owners, marine mechanics and fleet managers who work on Mercury 4-stroke outboards and want a full pump rebuild package. If you perform your own lower-unit servicing or run boats where reliable cooling is essential, this kit provides the matched parts needed to refresh the water pump assembly quickly and reliably. Always verify your engine model and serial against the compatibility list before ordering to ensure correct fitment.