Mercury Quicksilver Water Pump Gasket β 8172771
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Mercury Quicksilver Water Pump Gasket 8172771
Genuine Mercury Marine OEM water pump gasket for select MerCruiser Alpha One Gen II sterndrives and Mercury or Mariner outboard cooling-water pump assemblies. It seals the water-pump housing and plate interface during impeller or pump service.
Compatible Applications
- MerCruiser Alpha One Gen II sterndrives, serial number 0D436859 and above
- Mercury F40β60 FourStroke BigFoot and Command Thrust outboards
- Mercury or Mariner 60 HP 2-stroke BigFoot, serial number 0D000750 and above
- Mercury or Mariner 70β90 HP 3-cylinder 2-stroke outboards, serial number 0A996142 and above
- Mercury or Mariner 100β125 HP 4-cylinder 2-stroke outboards
- Mercury V200, 225, and 250 3.0L 2-stroke outboards
- Mercury 75β115 HP FourStroke outboards
- Mercury 150 HP EFI FourStroke outboards
- 4-cylinder and 6-cylinder Verado outboards with a 4.80 in. gearcase
Always confirm the engine or sterndrive serial number and the current parts diagram or ownerβs manual before ordering.
Part Details
- OEM part number: 27-8172771
- Part number: 8172771
- Brand: Mercury Quicksilver
- Product type: Water pump gasket
- System: Gearcase and seawater pump
- Supersedes: 27-817277
- GTIN: 745061321540
- Quantity: Sold individually
Key Features
- Genuine Mercury Marine OEM gasket
- Designed for the applicable water-pump housing and faceplate interface
- Supports reliable sealing during impeller and water-pump service
- Fitment depends on gearcase configuration and serial number
Replacement Guidance
Replace the gasket whenever it is torn, compressed, damaged during water-pump disassembly, or when the service procedure calls for a new gasket. Clean the mating surfaces completely and follow the ownerβs manual or service manual for orientation and assembly procedure.
Technical FAQ
Does 8172771 fit every Mercury or MerCruiser water pump?
No. Mercury uses several water-pump gaskets across similar gearcase families. Match 8172771 to the exact parts diagram, gearcase configuration, and serial number.
What part number does 8172771 replace?
It is the current OEM number listed as the replacement for 817277, also shown as 27-817277.
Is this gasket sold as part of a complete water-pump kit?
No. This listing is for one gasket. Related service parts may include upper water-pump housing 817275A2, faceplate 8M0204709, impeller 43026T2, and impeller key 8M0204723.
Related Parts
- Mercury MerCruiser Quicksilver Water Pump Impeller 43026T2
- Mercury MerCruiser Quicksilver Gasket 430331
- Upper water-pump housing 817275A2
- Water-pump faceplate 8M0204709
- Impeller drive key 8M0204723
Parts Desk Insights
Best use: Use this gasket when servicing a compatible Mercury or Mariner outboard water pump or a MerCruiser Alpha One Gen II cooling-water pump assembly.
Most common mistake: Ordering by horsepower alone. Similar gearcases can use different gaskets, so confirm the serial number and parts-diagram position first.
Fitment and sizing: This is one gasket for the exact 8172771 application. Match the complete 27-8172771 number and the 4.80 in. gearcase or Alpha One Gen II configuration where applicable.
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 β 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 β 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.