Mercury MerCruiser Quicksilver Exhaust Water-Shutter Assembly 807166A1
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Product Description
Mercury MerCruiser Quicksilver 807166A1 is an exhaust water shutter, also called a flapper, for specified MerCruiser installations. It acts as a check valve to reduce water flowing back through the exhaust toward the engine when the engine is stopped or running at low speed.
Key Features
- OEM water-shutter assembly, part 807166A1.
- Manufacturer-specified width at cross / hinge pin: 2.48 inches (63 mm).
- Installs within the specified exhaust water-shutter arrangement.
Engine Compatibility
Verified examples include the 5.0L MPI Alpha / Bravo exhaust system, serials 0M300000–0M599999, and specified 262 MAG TBI Gen+ assemblies. Confirm the engine serial number, exhaust-pipe design and shutter mounting arrangement.
Replacement and Installation
Inspect the shutter for burned, cracked, missing or damaged sections, particularly after an exhaust-cooling problem. Check the pivot and supporting pieces and investigate any overheating cause. Install the shutter in the correct orientation and verify free movement using the engine service procedure.
Parts Desk Insight
Shutter shape and pivot design vary across exhaust assemblies. The 2.48-inch cross-pin measurement is not a universal exhaust-hose size.
Manufacturer Parts Lookup
Use Mercury’s official parts finder to check the part against your engine or drive serial number.
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.