Mercury Quicksilver — Water Pump Repair Kit — 8M0208905
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Mercury Quicksilver Water Pump Repair Kit 8M0208905
Mercury Quicksilver 8M0208905 is a genuine OEM water pump repair kit for select Mercury and Mariner 25–30 HP FourStroke outboards. It provides the major wear components needed to service the raw-water cooling pump, helping restore dependable cooling-water circulation and protect the engine from overheating.
Compatible Applications
- Mercury 25 HP FourStroke outboards
- Mercury 30 HP FourStroke outboards
- Mariner 25 HP FourStroke outboards
- Mariner 30 HP FourStroke outboards
Serial-number fitment: The 2024 Quicksilver applications guide identifies this kit for engines in the 0R106999–1R162636 serial range. Mercury's current product information also lists 25–30 HP FourStroke applications from serial 0R051710 and above. Because water-pump configurations changed across these engine generations, verify the engine serial number and applicable parts diagram before ordering.
Part Details
- Current part number: 8M0208905
- Brand: Mercury Quicksilver
- Product type: Water pump repair kit
- Cooling system: Raw-water cooling pump
- Supersedes: 853792A07
- Condition: New
Kit Contents
- Water pump impeller
- Upper pump housing
- Lower pump housing
- Face plate
- Gaskets
- Seals
- O-rings
Key Features
- Complete repair kit rather than an impeller-only service
- Provides major wear components for water-pump service
- Helps restore proper cooling-water pump operation
- Designed for select 25–30 HP Mercury and Mariner FourStroke outboards
When to Service the Water Pump
Inspect and replace water-pump components according to the engine's maintenance schedule. Service should also be considered if cooling-water output becomes weak or inconsistent, the engine has overheated, the impeller is cracked or deformed, pump surfaces show wear, or the previous service history is unknown.
Installation Notes
Installation requires lower-unit removal and water-pump disassembly. Replace the supplied components in the correct sequence, inspect mating surfaces, and follow the applicable owner's manual or factory service manual. Confirm normal cooling-water circulation after installation and before returning the engine to service.
Technical FAQ
Is this an impeller-only kit?
No. It is a complete water pump repair kit that includes the impeller, pump housings, face plate, gaskets, seals, and O-rings.
Does horsepower alone confirm fitment?
No. Mercury used different water-pump configurations across the 25–30 HP FourStroke production range. Confirm the engine serial number before ordering.
What part does this kit supersede?
Part number 8M0208905 supersedes 853792A07.
Parts Desk Insights
Best use case: A complete water-pump service when the housing and sealing components have accumulated wear beyond the impeller itself.
Most common mistake: Ordering by horsepower alone. Different pump configurations were used across the 25–30 HP FourStroke production run.
Fitment guidance: Check the engine serial number before ordering. The applications guide identifies 0R106999–1R162636, while broader current product information starts at 0R051710, so the serial-specific parts diagram is the safest final check.
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.