Sierra 9252 Outboard Maintenance Kit | Mercury V6 Optimax 2.5L 2-Stroke (S/N 1B227000+, Non-Pro)
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Complete Service Kit for Mercury V6 Optimax 2.5L 2-Stroke Outboards — One Box.
The Sierra 9252 Outboard Maintenance Kit is a complete, one-box service solution for Mercury V6 Optimax 2.5L 2-stroke outboard engines with serial numbers 1B227000 and up (non-pro models). All components are specifically engineered for this engine family — no guessing on compatibility, no sourcing parts separately.
The 9252 kit includes the full water pump housing along with the impeller and impeller kit — making it the more comprehensive water pump service option compared to the Sierra 9251 Kit, which includes a repair kit only. This is the right choice when you want to replace the entire water pump assembly, not just the impeller.
Kit Contents (47-9252)
- Impeller
- Impeller kit
- Water pump housing
- Thermostat
- Thermostat gasket and bolt
- Inline oil filter
- Anode (aluminum)
- Anode mounting bolt
Key Features
- All components engineered specifically for Mercury V6 Optimax 2.5L 2-stroke outboards (non-pro models)
- Full water pump housing included — more comprehensive than a repair-kit-only service
- Aluminum anodes for corrosion protection in saltwater and freshwater environments
- Thermostat and gasket included to ensure proper engine temperature regulation
- Inline oil filter included for complete oil system maintenance
Compatible Applications
- Mercury V6 Optimax 2.5L 2-stroke outboard — serial numbers 1B227000 and up, non-pro models
- Confirm your engine serial number and model designation (non-pro) before ordering
Parts Desk Insights
The 9252 is the right kit when you want to do a thorough water pump service on a Mercury V6 Optimax 2.5L — the inclusion of the full water pump housing means you're replacing the entire pump assembly, not just the impeller. This is worth doing if the housing shows wear, scoring, or corrosion, or if you're doing a high-hour service where you want maximum confidence in the cooling system. For a standard impeller-only service, the Sierra 9251 Kit (1.5L engines) covers the smaller Optimax models.
For the Mercury V6 Optimax 3.0L kit, see the Sierra 9253 Kit. For Mercury 4-stroke outboard maintenance kits, see the Sierra 9243 Kit or Sierra 9244 Kit.
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.