Mercury Quicksilver — Thermostat Hose Clamp 36.1 mm — 8M0204719
Free returns on all eligible orders
You have 30 days to request a return. All sale items are final sale.
Mercury Quicksilver Thermostat Hose Clamp 36.1 mm 8M0204719
Mercury Quicksilver 8M0204719 is a genuine OEM 36.1 mm clamp used in thermostat and cooling-system hose assemblies. It is commonly positioned at the thermostat hose connection on applicable Mercury outboards and supersedes earlier Mercury part number 888988001.
Compatible Applications
- Mercury 65 Jet FourStroke applications from serial 2B095049 and up where the diagram specifies 888988001 or 8M0204719
- Additional Mercury outboard thermostat and cooling-hose assemblies whose diagram specifies 8M0204719
Serial-number fitment: Confirm the engine serial number and exact diagram position before ordering. Mercury thermostat assemblies can use multiple nearby clamp sizes, including 34.6 mm, 36.1 mm, and 42.5 mm clamps in the same cooling-system diagram.
Part Details
- Current part number: 8M0204719
- Catalog-form number: 54-8M0204719
- Brand: Mercury Quicksilver
- Product type: Thermostat hose clamp
- Diameter: 36.1 mm or approximately 1.42 in.
- System: Engine cooling and thermostat hose
- Supersedes: 888988001
- Approximate weight: 0.01 lb or 4.5 g
- Condition: New
Key Features
- Genuine OEM cooling-system clamp
- Specified 36.1 mm size
- Used at applicable thermostat and cooling-hose connections
- Current replacement for Mercury 888988001
When to Replace This Clamp
Replace the clamp if it is corroded, distorted, weakened, overtightened, or physically damaged; if tension is no longer sufficient to secure the hose; or if coolant or raw-water seepage is visible around the connection. Inspect the hose whenever the clamp is removed.
Installation Notes
Install the clamp in the location and orientation shown in the applicable parts diagram. Inspect the thermostat hose for cracking, hardening, swelling, or deterioration before reassembly. Do not substitute a visually similar clamp without confirming its diameter and diagram position.
Related Products
- Mercury Outboard Thermostat Assembly 120°F — 8M0090819
- Mercury Quicksilver Thermostat Assembly — 8M0174561
Technical FAQ
Can this clamp be selected by appearance?
No. Nearby thermostat components may use several similar clamp diameters. Confirm 36.1 mm and the exact part number.
What earlier part does it replace?
8M0204719 supersedes Mercury clamp 888988001.
Will it fit every Mercury thermostat hose?
No. Use it only where the serial-specific cooling-system diagram specifies 8M0204719 or 888988001.
Parts Desk Insights
Best use case: Replacing the specified 36.1 mm clamp during thermostat or cooling-hose service on a compatible Mercury outboard.
Most common mistake: Choosing a nearby 34.6 mm or 42.5 mm clamp because it looks similar. Diagram position and part number matter more than appearance.
Fitment guidance: Verify the engine serial number, clamp diameter, thermostat-hose diagram position, and adjacent component arrangement before ordering.
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.