Mercury Quicksilver Water Pump Repair Kit 25-30HP 4-Stroke 853792A07
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Mercury Quicksilver 853792A07 is a complete water pump repair kit for select Mercury / Mariner 25–30 HP 4-stroke outboards. Current Mercury references show 853792A07 superseding to 8M0208905, the current replacement kit. This kit is designed for water pump service and includes the main pump wear components needed to restore proper cooling-water flow through the outboard’s lower-unit water pump assembly.
Key Features
- Complete water pump repair kit for select Mercury / Mariner 25–30 HP 4-stroke outboards
- Includes water impeller, pump housing, face plate, gaskets, seals, and O-rings
- Helps restore cooling-water flow and reduce overheating risk
- Original Mercury reference: 853792A07
- Current Mercury / Quicksilver replacement: 8M0208905
- UPC / GTIN references include 745061704015 for 853792A07 and 00678633186295 / 678633186295 for 8M0208905 references
Engine Compatibility
This kit is listed for select Mercury or Mariner 25–30 HP 4-stroke outboards. Mercury’s current product reference for 8M0208905 lists use on Mercury 25–30 HP 4-stroke outboards, serial number 0R051710 and above. Older 853792A07 catalog references also associate the kit with 25–30 HP EFI FourStroke applications, including serial ranges beginning at 0R106999 depending on catalog source and model grouping.
Serial Number Fitment Notice
Water pump kit fitment depends on the exact outboard model, lower-unit water pump assembly, and serial number range. Always confirm compatibility using the Mercury or Mariner engine serial number before ordering, especially where older 853792A07 has been replaced by 8M0208905.
When This Part Needs Replacement
Replace the water pump kit during scheduled water pump service, after overheating, after dry running, or when the impeller, pump housing, face plate, seals, or gaskets show wear, scoring, cracking, distortion, or heat damage. A weak water pump can reduce cooling performance and may lead to engine overheating.
Installation Notes
Inspect the complete lower-unit water pump stack during service, including the housing, impeller, face plate, seals, gaskets, key, and mating surfaces. Install the impeller in the correct rotation and follow the Mercury service manual procedure for the specific engine. A full kit is often the better choice when the housing or plate is worn, rather than replacing only the impeller.
Alternate / Superseded Part Numbers
- 853792A07
- 8M0208905
- 853792A1
- 853792T01
- Related Tohatsu / Nissan reference: 361-87322-0 / 361873220 — confirm by engine model and serial number before substituting
Parts Desk Insight
This kit is more complete than an impeller-only service part. If the pump housing or wear plate is scored, replacing the full kit helps restore cooling performance and reduces the chance of reopening the lower unit for the same issue.
Shipping: Ships same or next day for fast Canada wide shipping. ⚓
Shipping information
In-stock and OEM parts: ship same or next business day.
Locally warehoused items: ship within 3–4 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.