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Mercury Mariner 6-15hp Water Pump Kit (OSWK420)

Genuine Part # : 46-42089A5

In Stock
  • Free Shipping


  • 1 YEAR


  • ISO 9001 Certified
    ISO 9001


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Suits USA, Australia and Belgium models only.

This part replaces part #: 46-42089A5.

This part suits the following engines: Mercury Mariner 6-8hp 2 Stroke 1986-2005, Mercury Mariner 9.9hp 2 Stroke 1986-2015, Mercury Mariner 15hp 2 Stroke 1988-2015.


About The Brand

Outboard Spares brand of parts are tested in Australia's harsh marine environment with a focus on quality and durability. Outboard Spares parts are used by professional fishermen who depend on their parts to stay on the water and in business. So next time you service your engine choose what the professionals use, choose Outboard Spares.

  • Standard Shipping is free on all orders. Oils & Lubricant products can only be sent via Standard Shipping.
  • Express Shipping is $10 flat rate.
  • Pick up is available from our warehouse at 1/84 Brunel Road, Seaford VIC 3198 between the hours of 8:30am to 3:30pm weekdays. You will be notified by email when your order is ready for pick up.

Delivery Time

Orders are dispatched same business day if ordered before 3:00pm AEDT. All orders are dispatched from Melbourne, Victoria and are sent via Australia Post.

For delivery time estimates with Australia Post please use their delivery calculator here:

If you have any questions relating to shipping, please contact us by emailing

2000 15hp mercury impeller service kit

By: on 9 February 2024
Kit worked perfect for the service, all the parts and seals i needed.

Water Pump Kit

By: on 6 October 2022
Good kit. Quality seems very high. Only issue is that it doesn’t come with the drive key! The OEM water pump kit has the drive key as do other Outboard Spares water pump kits. It really should indicate that this isn’t included as you have to order the key from somewhere else. I can’t find it on Outboard spares. Shame because it has absolutely everything else you need for a new water pump!!

Review Mercury Mariner 6-15hp Water Pump Kit (OSWK

By: on 2 February 2022
Thanks for service and parts old Mariner hasn’t run so good.

Complete water pump kit

By: on 11 December 2020
Experience and knowledge! helped me find exactly what i needed, even for an older mercury. I will definitely be using them again.

Water pump kit

By: on 21 June 2019
Good service

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