Full Power Plus water pump impeller kit for MerCruiser Alpha 1 Gen 2 — 43026Q06, neoprene impeller & gasket set

Full Power Plus 43026Q06 is a complete water pump impeller kit engineered to restore reliable cooling flow for MerCruiser Alpha 1 Gen 2 and compatible Mariner/Mercury outboards from 40–250 HP.

This kit bundles the neoprene impeller and all common sealing and hardware components needed to service the water pump on many sterndrive and outboard applications. Designed for routine replacement intervals, the kit helps maintain proper engine cooling by replacing worn vanes, gaskets, and O-rings that can lead to reduced water flow or overheating when neglected.

How does this kit match my engine model and part numbers?

Compatibility is based on OEM cross-reference numbers and the mechanical layout of MerCruiser Alpha 1 Gen 2 and certain Mariner outboards. The kit includes parts that correspond to commonly used factory numbers, making it easy to swap in place of worn originals.

• Includes neoprene impeller (47-43026-T2) designed to suit 8M0100526 style housings.
• Face plate provided (8172761) for correct impeller seating and pump geometry.
• Gaskets (430331 / 8172771), impeller key, and O-ring included for a complete seal.
• Cross-references: 43026Q06, 18-3217, and similar MerCruiser/Mariner numbers.

What materials and durability features should I expect?

The impeller is molded from modern neoprene chosen for flexibility and resistance to heat and water additives, while the kit’s metallic components use corrosion-tolerant alloys. Together they’re intended to hold up under normal marine conditions and provide consistent performance between service intervals.

• Neoprene impeller resists cracking and premature wear compared with inferior rubbers.
• Metal face plate and hardware made from durable alloys for long life in marine environments.
• Complete gasket and O-ring set helps prevent leaks and maintains proper pump pressure.

How do I install the kit and what should I check during replacement?

Installation follows standard water-pump service steps: remove the old impeller, inspect the housing and pump bore, fit the new impeller and face plate, replace gaskets and seals, and torque fasteners to manufacturer specs. Checking shaft splines, key fit, and the bore for scoring prevents early failure.

• Verify shaft key orientation and engage the impeller fully on the driveshaft.
• Inspect pump housing for grooves or corrosion; smooth or replace if damaged.
• Use the supplied gasket and O-ring to ensure a leak-free seal before reassembly.
• Prime and run the engine briefly while monitoring water flow and leaks.

Who is this for: Boat owners, mechanics, and DIY enthusiasts who service MerCruiser Alpha 1 Gen 2 sterndrives or Mariner outboards from roughly 40 to 250 HP and need a complete, ready-to-install impeller replacement. If you perform regular maintenance or are troubleshooting low water flow, this kit supplies the core components to restore pump function. Always confirm your engine’s OEM part numbers before purchasing; contact Full Power Plus customer support if you need assistance matching this kit to your specific model.