Water Pump Impeller Repair Kit with Housing for Yamaha 40HP 50HP 2-Stroke | Replaces 6H4-W0078 & 663-44311-02

Description:
Complete water pump impeller repair kit including the pump housing — suitable for Yamaha 40HP and 50HP 2-stroke outboards. This kit is perfect for full cooling system service or repair.

Fits Yamaha 2-Stroke Outboards:

40 HP (1984–1994)
50 HP (1984–1994)
PRO 50 HP (1987–1994)
P50 HP (1991–1993)
(40H and 50D models)

Replaces Yamaha Part Numbers:

6H4-W0078
663-44311-02 (housing)
(OEM numbers used for reference only — this is a compatible high-quality aftermarket replacement)

Kit Includes:

1 x Impeller (Neoprene) – 6H4-44352-02
1 x Water Pump Housing – 663-44311-02
1 x Cartridge Insert – 663-44322-00
1 x Outer Plate – 663-44323-00
1 x Damper Water Seal – 663-44366-00
1 x Woodruff Key – 90280-03024-00
2 x Bolts with Washers – 97080-08055-00
2 x Bolts with Washers – 97080-08045-00
1 x Cartridge Gasket – 663-44324-A0
1 x Water Pump Gasket – 663-44315-A0
1 x Water Pump Gasket – 663-44316-A0

Why Buy from SSI Marine?

High-quality marine-grade aftermarket parts
Designed to match original OEM fit and function
UK-based stock for fast dispatch
Same-day shipping for orders placed before 1 PM
Collection available from our Leigh, Manchester unit
VAT invoice available on request
Friendly technical support if you're unsure about fitment

Yamaha 40HP 50HP 2-Stroke Water Pump Impeller Repair Kit incl Housing