Description

Mercury MerCruiser Quicksilver 817275K05 is a genuine OEM upper water pump repair / rebuild kit for MerCruiser drive service. Current Mercury official product pages describe it as an upper water pump repair kit designed to restore cooling-water flow after wear from silt, sand, and other abrasives, and they identify it for MerCruiser Alpha One Gen II sterndrives.

Key Features

• Genuine Mercury MerCruiser OEM part number 817275K05.
• Mercury describes it as an upper water pump repair kit for Alpha One Gen II drives.
• Current official kit contents include gaskets, O-ring, plates, impeller, key, water guide fittings, and upper housing.
• The Quicksilver counterpart is described as a complete 11-piece upper water pump repair kit.
• Current Mercury dealer references show GTIN / UPC 745061029019.

Engine Compatibility

The strongest supportable fitment for 817275K05 is MerCruiser Alpha One Gen II sterndrives. Current Mercury official pages state Alpha One Gen II directly, while current Quicksilver and Mercury dealer references also associate the same upper water pump repair kit family with Vazer drives.

Serial Number Fitment Notice

Verify fitment by exact engine serial number, drive model, and drive generation before ordering. With 817275K05, the important check is that the drive is the correct Alpha One Gen II / applicable Vazer-style upper water pump application, because similar Mercury water pump kits can look close while fitting different housings and service ranges. This fitment caution is supported by current Mercury and dealer references that tie the kit to specific drive families rather than a broad one-kit-fits-all application.

When This Part Needs Replacement

This kit is typically replaced during routine impeller service, when cooling-water flow drops, or when the upper water pump shows wear from sand, silt, or other abrasives. Mercury’s current product description specifically links the kit to restoring water flow after abrasive wear in the pump system.

Installation Notes

Install 817275K05 only after confirming the correct upper water pump application for the drive being serviced. Current Mercury and Quicksilver product references indicate the kit is intended to provide the needed upper-pump service parts for installation with common tools, and Mercury directs users to the service manual for installation instructions.

Alternate/Superseded Part Numbers

Current references connect 817275T4 as a superseded OEM number for 817275K05. Current Quicksilver references also show the matching Quicksilver service-kit number 817275Q05 for the same upper water pump repair kit family.

Parts Desk Insight

This is the kind of kit that is easy to order by impeller style alone, but the smarter match is the exact drive family and upper pump design. For 817275K05, confirming Alpha One Gen II first usually saves time and helps avoid getting a similar-looking kit for a different Mercury drive.

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