Mercury – Quicksilver Flushing Attachment | Engine Maintenance Tool | Durable Composite | 12612Q2

Overview

Anyone who’s spent a few seasons on the water knows the easiest way to keep an outboard running strong is to flush it right. The Mercury Marine 12612Q2 Quicksilver Flushing Attachment makes that job simple. Designed for smaller Mercury and Mariner outboards, it connects cleanly to your water inlets and lets you flush the cooling system with a standard garden hose. Whether you’re washing away salt after a weekend on the bay or clearing silt from a shallow launch, this tool helps your motor stay clean, cool, and ready for the next trip.

Key Features

• Purpose: Flushes salt, sand, and debris from the cooling system to prevent corrosion and blockage.
• Material: Built from durable, impact-resistant composite that won’t crack or deform under pressure.
• Design Detail: Provides secure, leak-free connection to lower-unit water inlets; supports idle-speed engine operation during flushing.
• Compatibility: Fits Mercury and Mariner 4–15 horsepower TwoStroke outboards, plus 4, 5, and 6 horsepower FourStroke and 8, 9.9, and 15 horsepower (323cc) FourStroke models with standard gearcases.
• Ease of Use: Attaches easily to a standard garden hose — no tools required.

Engine & Boat Compatibility

• Mercury and Mariner 4–15HP TwoStroke outboards.
• FourStroke 4/5/6HP and 8/9.9/15HP (323cc) engines.
• Ideal for dinghies, tenders, fishing boats, and small runabouts powered by manual or portable outboards.
• Designed for engines with standard gearcases.
• Works effectively for both freshwater and saltwater boats.

Performance & Practical Benefits

Flushing your engine after every outing is one of the simplest ways to extend its life. The 12612Q2 Flushing Attachment makes that process fast and reliable. Once clipped in place, it delivers steady water flow through the cooling system, washing away salt crystals, sand, or mud that can damage internal passages.

You can safely run the engine at idle while flushing to circulate fresh water through the impeller and passages — no overheating, no guesswork. The secure fit prevents leaks and keeps water moving exactly where it’s needed. It’s light, easy to handle, and tough enough to last for years, even with regular use.

Why Buy OEM

It’s tempting to grab a cheap universal flusher, but the fit and performance rarely match Mercury’s original design. The Quicksilver 12612Q2 is built specifically for Mercury and Mariner outboards, with the right pressure balance and alignment to ensure complete cooling system coverage.

Using genuine Mercury Marine parts means no leaks, no weak seals, and no risk of running the motor dry. It’s a small investment that protects the core of your engine — and gives you the peace of mind that comes from doing maintenance the right way.

FAQ

Q1: Which engines does this flushing attachment fit?
It fits Mercury and Mariner 4–15HP TwoStroke outboards, plus 4/5/6/8/9.9/15HP FourStroke (323cc) models with standard gearcases.

Q2: What makes this different from universal flushers?
It’s designed to Mercury’s specs, providing a perfect fit and steady water flow for proper flushing at idle.

Q3: How do I know it’ll fit my outboard?
Check your engine’s horsepower and confirm it has a standard gearcase. If so, 12612Q2 will fit.

Q4: Can I run the engine while flushing?
Yes — it’s designed to allow safe idle-speed operation during the flush.

Q5: Does it work in both fresh and saltwater environments?
Absolutely. It’s built for both and helps remove residue from either.