Description

The Sierra SIE-18-3478 Water Pump Repair Kit is an aftermarket water pump service kit for select Honda 8–20 HP 4-stroke outboards. This kit is supplied without the water pump housing and is used to refresh key wear components in the outboard’s cooling-water pump. It is commonly referenced as a replacement for Honda 06192-ZW9-A30 and includes the impeller, water pump gasket, O-ring, and impeller key.

Key Features

• Sierra water pump repair kit for Honda outboard cooling systems.
• Supplied without housing.
• Designed for select Honda 8 HP, 9.9 HP, 15 HP, and 20 HP 4-stroke outboards.
• Includes key service parts for water pump maintenance.
• Replaces Honda outboard water pump kit 06192-ZW9-A30.
• Kit contents include:
  • Sierra 18-32455 impeller
  • Water pump gasket
  • Sierra 18-71335 O-ring
  • Sierra 18-3025 impeller key

Engine Compatibility

This kit is commonly listed for the following Honda outboard applications:

• BFP8D / BFP9.9D — 2003–2006
• BF15D / BF20D — 2003–2006
• BFP20D — 2004–2006
• BFP8D / BFP9.9D / BF15D / BFP15D / BF20D — K0, K2, K3
• BFP20D — K0

Serial Number Fitment Notice

Water pump kits should be confirmed by Honda model code, year, shaft length, OEM part number, or engine serial-number parts lookup before ordering. Honda outboards in the same horsepower range can use different pump assemblies depending on model version and production range, so matching the OEM number is the safest way to confirm fitment.

When This Part Needs Replacement

Replace this kit when the outboard shows weak cooling-water flow, overheats, has an irregular tell-tale stream, or after the pump has been run dry. It is also good practice to service the water pump when the impeller is cracked, stiff, missing vane material, permanently bent, or when the lower unit is already removed for seasonal maintenance.

Installation Notes

Install with the lower unit removed and inspect the pump housing, cup, and wear plate before reassembly. This kit does not include the housing, so any damaged, scored, melted, or heavily worn housing components should be replaced separately. Lightly lubricate the impeller during installation, confirm the impeller key is seated properly, and verify strong cooling-water flow immediately after startup.

Alternate/Superseded Part Numbers

• SIE-18-3478
• 18-3478
• 183478
• 18 3478
• 118-3478
• Honda 06192-ZW9-A30
• Honda 19210-ZW9-A31
• Honda 19210-ZW9-A32
• Honda 19232-ZW9-000
• Honda 90752-ZW9-A30
• Honda 91301-ZG3-000
• UPC: 808282376864

Parts Desk Insight

This is the correct style of kit when the pump housing is still in good shape and only the wear-service parts need replacing. If the old impeller failed badly or overheated, inspect the housing closely before reusing it — a damaged housing can shorten the life of the new impeller.

Shipping: Ships same or next day for fast Canada wide shipping.