Mercury Quicksilver Outboard Flushing Attachment 12612T2
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Mercury Quicksilver Outboard Flushing Attachment 12612T2
Keep your outboard's cooling system clean and protected with this genuine Quicksilver OEM flushing attachment. Designed to connect to a standard garden hose, it delivers fresh water through the cooling passages after saltwater or silty use — and allows the engine to run at idle speed during flushing for a thorough flush of the entire cooling circuit.
Also referenced as 12612Q2, which is the current alternate part number associated with this kit.
Key Features
- Genuine Quicksilver OEM flushing attachment
- Part number: 12612T2 / alternate: 12612Q2
- Connects to a standard garden hose
- Allows engine to run at idle speed during flushing
- Designed for select Mercury / Mariner small outboards with standard gearcase
Engine Compatibility
Fits select Mercury / Mariner 4–15 HP 2-stroke outboards, 4/5/6 HP FourStroke outboards, and 8/9.9/15 HP FourStroke (323cc) models with a standard gearcase water-pickup arrangement. Always verify fitment by engine serial number, horsepower, and gearcase style before ordering.
Fitment Notice
The key fitment check is whether your outboard uses the compatible standard gearcase / water-pickup layout — similar small Mercury outboards can require different flushing solutions depending on generation and lower-unit design. Confirm against your engine serial number and parts diagram before ordering.
When to Replace
Replace when the attachment no longer seals correctly over the water intake, is cracked, hardened, or damaged, or no longer stays positioned properly during use. A proper seal is essential for effective cooling system flushing.
Installation Notes
Connect to a fresh water source and confirm the attachment seats correctly on the gearcase before turning on the water and starting the engine. Use only at idle speed. Follow the Mercury service manual for your specific model's flushing procedure and duration.
Alternate Part Numbers
- Mercury / Quicksilver: 12612T2
- Alternate / current reference: 12612Q2
Related Products
- FlushMaster Flush Port Quick Connect — Mercury Outboard — Quick-connect flush port adapter for Mercury outboards
- FlushMaster 2-Port Automated Flushing System — Automated dual-port flushing system with 12 ft hose kits
- Seachoice 18411 Outboard Flush Kit — Aftermarket flush kit compatible with Mercury, Mariner, Yamaha & Suzuki outboards
Parts Desk Insights
Best use case: This flushing attachment is the right choice for routine post-use flushing on compatible small Mercury / Mariner outboards — particularly for boats used in saltwater, brackish water, or silty conditions where cooling passage buildup is a real concern. The advantage over a simple muff-style flusher is that this OEM attachment is designed to fit the specific gearcase geometry and allows the engine to run at idle during flushing, which circulates fresh water through the full cooling circuit rather than just the lower unit. Match by gearcase style and serial number, not just horsepower.
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
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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:
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