Mercury MerCruiser Quicksilver — Alpha One Gen II Upper Water Pump Repair Kit — 817275K05
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Mercury MerCruiser Quicksilver Upper Water Pump Repair Kit — 817275K05
Rebuild the upper water pump on an applicable Alpha One Gen II sterndrive with this genuine Mercury kit. Replacing worn pump components helps restore cooling-water flow when the impeller, housing, or plates show wear.
Compatible Applications
- MerCruiser Alpha One Gen II sterndrives
Confirm the exact drive model, generation, and serial number against the service manual before ordering. Do not select this kit by engine displacement alone; earlier Alpha One, R, and MR pump designs differ.
Kit Contents
- Water pump impeller and key
- Upper pump housing and plates
- Gaskets and O-ring
- Water-guide fittings
When to Replace
Consider this kit during pump service if the impeller is damaged, the upper housing or plates are scored, or cooling-water flow has deteriorated. Inspect the lower housing, driveshaft, and sealing surfaces while the pump is apart, and follow the MerCruiser service procedure for installation.
Related Parts
- Mercury MerCruiser impeller repair kit — 8M0100526
- Mercury MerCruiser water pump repair kit — 8M0100527
Check the parts diagram and your drive serial number to choose the correct kit for your pump assembly.
Technical FAQ
Is this the same as an impeller-only kit?
No. This upper-pump repair kit includes the housing, plates, seals, and fittings as well as the impeller.
Will it fit an earlier Alpha One drive?
Match the kit to the Alpha One Gen II gear housing and drive serial number; earlier drive generations use different pump hardware.
Parts Desk Insights
Best use case: choose the upper-pump repair kit when the housing and plates show wear along with the impeller.
Common mistake: ordering by impeller appearance or engine size without checking the drive generation.
Sizing and fitment guidance: verify the Alpha One Gen II gear housing and drive serial number before ordering; use the service manual to confirm the correct pump assembly.
Shipping information
In-stock and OEM parts: ship same or next business day.
Locally warehoused items: ship within 1-3 business days.
Special-order items: timeline confirmed after order.
Returns & warranty
Returns & Satisfaction Guarantee
We stand firmly behind the quality of every product we sell. Your confidence matters to us — and we back it with a straightforward 30-Day Satisfaction Guarantee.
If you are not fully satisfied, you may request a return within 30 days of delivery. All returns must receive pre-approval prior to being sent back. Unauthorized returns will not be accepted.
To qualify for a return:
Item must be in new, unused condition
Product must be in its original packaging
All parts, components, hardware, manuals, and accessories must be included
Packaging must be undamaged and suitable for resale
Important:
Electronics are strictly inspected. No returns on open-box electronics. Exceptions may apply only with prior written approval. Any electronic unit that has been installed, powered, activated, or altered may not be eligible for return.
We are serious about product integrity — and equally serious about taking care of our customers. If there is ever a product issue, contact us immediately so we can make it right.
For return authorization, please contact our support team before shipping anything back.