NorthBoat 394711 Water Pump Impeller Kit with Housing for Johnson Evinrude 8-15 HP

NorthBoat 394711: Complete Impeller Kit for Johnson Evinrude 8–15 HP

Keep your outboard running reliably with the NorthBoat 394711 Water Pump Impeller Kit with Housing. Engineered for Johnson Evinrude 8–15 HP two- and four-stroke models from 1974 and later, this kit provides a complete, ready-to-install solution that supports a healthy cooling system and smoother operation on the water. It’s designed to fit the driveshaft inside the gearcase, offering a straightforward maintenance path for boaters who value dependable performance on every trip.

Why this kit matters goes beyond a simple replacement part. When an impeller wears, the cooling system can falter, which may affect overall engine performance. This kit aims to restore a steady water flow and a more consistent pee stream, while the included housing helps seal the assembly neatly. Though performance outcomes vary by engine and usage, many boaters notice more predictable operation after a swap when paired with proper maintenance intervals.

What’s included

• 1 X Pump Housing
• 1 X Neoprene Impeller
• 1 X Pump Cup
• 1 X Seal
• 1 X Wear Plate
• 2 X O-Ring
• 3 X Grommet
• 4 X Installation Bolt
• 1 X Pin

Compatibility and benefits

• Replaces Johnson Evinrude 0394711 and is compatible with Sierra and Mallory variants listed in the data
• Designed for 8–15 HP, 2- and 4-stroke engines from 1974 onward, aligning with many classic outboards
• Includes a full hardware set to support a complete impeller swap, reducing installation guesswork
• Addresses common issues linked to worn impellers, including overheating, weak water flow, and rough running
• Intended for routine maintenance every 1–2 years or around 100 running hours to help sustain motor health

Maintenance and real-world use

In real-world boating, a fresh impeller and housing can contribute to steadier cooling and quieter, more confident starts off idle. The kit supports straightforward maintenance during off-season or at regular service intervals, making it a practical choice for seasonal boaters and weekend adventurers alike. It’s a practical upgrade for those who rely on their Johnson Evinrude outboard for lake days, trolling, or calm river runs, where dependable cooling supports predictable performance.

Why choose NorthBoat

NorthBoat offers aftermarket parts designed to mirror OEM intent while expanding accessibility for boaters who value ease of use and clear compatibility. By including a robust set of seals, grommets, and fasteners, this kit aims to save time and reduce the need for additional parts shopping. As with any engine maintenance, results depend on correct installation and maintenance cadence.

Note: This description summarizes product features and use cases based on the provided data. It does not guarantee engine performance and should be used as a guide alongside your boat maker’s recommendations.