Water Pump Impeller Housing for Mercury / Mariner Outboards

High-quality water pump impeller housing, designed to restore correct cooling system operation on compatible Mercury and Mariner 4-stroke EFI outboards.

This housing forms the base of the water pump assembly and is suitable for engines with the gearcase and drive shaft configurations listed below.

Fitment – Mercury / Mariner Outboards

Engine Type

• 4-Stroke EFI & Carb models
• 3-Cylinder and 4-Cylinder engines
• Gear ratios 2:1 and 1.83:1 (model-dependent)

Horsepower Coverage

• 30 HP EFI
• 40 HP (Carb & EFI)
• 50 HP EFI
• 60 HP EFI

Serial Number Range

Fits engines with serial numbers including (but not limited to):
• 0P401000 & up
• 1B227000 – 1B344398
• 1C000001 & up
• 0P153500 – 0P515897
• 0T409000 – 1B344306

⚠️ Serial number and gearcase configuration are critical for correct fitment.
If you are unsure, please contact us before purchase with your engine serial number.

Replaces Mercury / Mariner OEM Part Number

• 14334A3

OEM part numbers are used for reference only.

Product Notes

• Water pump housing only
• Designed for correct impeller alignment and cooling flow
• Marine-grade quality aftermarket part
• Fully compatible and interchangeable with OEM

Buyer Responsibility

It is the buyer’s responsibility to confirm compatibility using the engine model, horsepower, and serial number.
Even if a part looks similar, it may not be correct for your outboard.

If unsure, please message us — our technical team will be happy to help.

For general guidance on choosing the correct outboard parts, visit our help page:
https://sssimarine.co.uk/blogs/news/blogs-news-how-to-order-the-correct-outboard-parts

About SSI Marine

All parts are held in UK stock and dispatched from our Leigh (Manchester) workshop.
Collection available Monday–Friday, 9am–5pm.
Orders placed before 1pm are dispatched the same working day.
VAT receipts available on request.

30–60HP Water Pump Impeller Housing for Mercury / Mariner 4-Stroke EFI – Replaces 14334A3