Quality aftermarket water pump housing gasket suitable for a range of Yamaha 2-stroke outboard engines.

This gasket seals the water pump housing and helps maintain proper cooling system operation. Manufactured to OEM specifications for reliable fitment and durability.

This gasket corresponds to Item No. 20 on the Yamaha lower unit (drive shaft assembly) diagram.

Replaces Part Number

663-44316-A0

Fitment

Yamaha Outboards (6E9 / 6H4 / 6H5 Series)

40HP

Models with 6E9 and 6H4 serial ranges
Approx. 1984-1993

50HP

6H5 Series Models
Approx. 1984-1993

55HP

Selected Models
Approx. 1989-1993

IMPORTANT

Please check your engine model, serial number and existing gasket before ordering. If you are unsure of compatibility, send us your engine details and our team will gladly confirm the correct part.

Details

Water pump housing gasket
Premium aftermarket replacement
Replaces Yamaha 663-44316-A0
Corresponds to Item No. 20 on Yamaha lower unit diagram
Helps maintain proper cooling system sealing
Manufactured to OEM specifications
Direct-fit replacement

Why Buy from SSI Marine

Workshop-tested aftermarket & OEM-spec parts
Fast UK dispatch (same-day before 1 PM Mon–Fri)
Tracked 24-hour UK delivery
UK stock – collection available from Leigh (Manchester)
Technical support available

Buyer Responsibility

Please confirm compatibility with your engine model and serial number before purchase. If unsure, contact us — our technical team will be happy to help.

Help Page:
https://www.ssimarine.co.uk/pages/contact-us

40HP 50HP 55HP Water Pump Housing Gasket for Yamaha 2-Stroke Outboards Replaces 663-44316-A0