1. Boat Outboard Engines To Buy
  2. sku: 24041007223378721
  3. MERCURY 44357Q2

MERCURY 44357Q2 Quicksilver Flushing Kit 44357A2

fits make: Mercury.

44357a2 Mercury 44357q2 44357 Quicksilver Flushing Kit

( Manufacturer Part Number: 44357Q2 ), ( Including: Products As Shown In The Picture ), ( Custom Bundle: No ), ( Country Of Origin: United States ), ( California Prop 65 Warning: This Product Contains Chemicals Known To The State Of California To Cause Cancer )

Review MERCURY 44357 Quicksilver Flushing Kit

The **Mercury 44357Q2, 44357 QuickSilver, and 44357A2 Flushing Kit** is a premium, high-performance maintenance solution designed specifically for Mercury outboard motors, ensuring optimal engine performance, longevity, and reliability. This comprehensive flushing kit is engineered to remove stubborn deposits, scale, and corrosion buildup from critical engine components, including the cooling system, fuel system, and internal passages, which can otherwise lead to reduced efficiency, overheating, or even catastrophic engine failure. The kit includes a carefully selected blend of high-quality, marine-grade flushing chemicals tailored to dissolve mineral deposits, rust, and varnish without damaging seals, gaskets, or sensitive engine parts. The **44357Q2** variant is a versatile, ready-to-use liquid flush designed for quick and efficient use, ideal for routine maintenance or pre-season preparations, while the **QuickSilver** formulation offers enhanced corrosion protection and scale dissolution, making it particularly effective for motors operating in brackish or saltwater environments. The **44357A2** is a specialized additive designed to work in conjunction with the flushing process, providing additional lubrication and protection for internal engine components during the flush cycle. Together, these components form a complete solution that not only cleans but also safeguards the engine against future deposits, ensuring smoother operation and extending the life of the motor. Whether used during routine maintenance, after a season of heavy use, or as part of a pre-purchase inspection, this flushing kit is a critical tool for marine enthusiasts and professionals who demand the best performance from their Mercury outboards. Its precise formulation and ease of use make it a trusted choice for maintaining the pristine condition of engines in boats of all sizes, from compact fishing vessels to high-performance cruisers.

**Pros and Cons of buying a Mercury 44357Q2/44357A2 Flushing Kit (Quicksilver Series)**

### **Pros**

1. **Compatibility and Reliability** The Mercury 44357Q2 and 44357A2 are designed specifically for Mercury outboard engines, ensuring a proper fit and optimized performance. They are part of the Quicksilver series, which is known for high-quality marine components.

2. **Efficient Flushing** These kits are designed to effectively remove old oil, sludge, and contaminants from the engine s lubrication system. Proper flushing helps prevent engine wear, improves fuel efficiency, and extends the life of critical components like the crankshaft, bearings, and camshafts.

3. **Prevents Engine Damage** Over time, oil breaks down and accumulates debris, which can clog oil passages and cause premature wear. Using a flushing kit before an oil change helps clear these blockages, reducing the risk of catastrophic failure.

4. **Cost-Effective Maintenance** While the kit adds a small upfront cost, it is far cheaper than repairing or replacing damaged engine parts caused by neglected maintenance. It is a proactive measure rather than a reactive one.

5. **Easy to Use** The process involves draining old oil, running the engine with the flushing oil, and then performing a standard oil change. Most users find it straightforward, especially with clear instructions provided by Mercury.

6. **Recommended by Manufacturers** Mercury Marine and other marine engine manufacturers often recommend periodic flushing as part of routine maintenance, particularly for older engines or those operating in harsh conditions.

7. **Improved Engine Performance** A clean lubrication system reduces friction, which can lead to smoother operation, better fuel economy, and less engine noise over time.

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### **Cons**

1. **Additional Cost** While affordable, the flushing kit adds to the overall maintenance expense of an oil change. Some owners may question whether the cost is justified, especially if the engine is relatively new or well-maintained.

2. **Time-Consuming Process** Flushing requires extra steps beyond a standard oil change, including draining old oil, adding flushing oil, running the engine, and then performing a final oil change. This can take significantly longer, particularly for those unfamiliar with the process.

3. **Potential for Overuse** Some owners might be tempted to use the flushing kit too frequently, which could lead to unnecessary wear on seals or gaskets if done excessively. Mercury recommends following the specified interval (typically every 100 hours or annually, depending on usage).

4. **Mixed Opinions on Effectiveness** While many users report benefits, others argue that modern synthetic oils are already effective at keeping engines clean, and flushing may not be necessary unless the engine shows signs of sludge buildup.

5. **Risk of Contamination** If not done correctly, the flushing process could introduce debris into the engine if the old oil isn t fully drained or if the flushing oil isn t properly removed before the final oil change.

6. **Not Universal** These kits are specific to Mercury engines and may not be compatible with other brands. Buyers must ensure their engine model is listed as compatible before purchasing.

7. **Environmental Considerations** Used flushing oil and old oil must be disposed of properly, which may require additional effort or cost if the owner doesn t have access to a marine oil recycling center.

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### **Conclusion**

The Mercury 44357Q2/44357A2 flushing kit is a valuable tool for maintaining Mercury outboard engines, particularly for older models, high-hour engines, or those operating in demanding conditions. Its primary benefit lies in preventing costly engine damage by removing sludge and contaminants from the lubrication system. While it adds a small expense and requires extra time, the long-term advantages such as improved engine longevity, better performance, and reduced risk of failure often outweigh the drawbacks.

For engines with high mileage, frequent use, or those showing signs of sludge buildup (e.g., thick oil, increased engine noise, or poor performance), the flushing kit is highly recommended. However, for newer engines with well-maintained oil change schedules, the necessity may be less critical. Owners should follow Mercury s maintenance guidelines and use the kit as directed to avoid overuse or improper application.

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### **Recommendation**

**Buy the Mercury 44357Q2/44357A2 flushing kit if:**

- Your Mercury outboard engine has **500 hours** or is **older than 5 years**.

- You notice **thick or dirty oil**, **increased engine noise**, or **reduced performance**, indicating potential sludge buildup.

- You perform **regular maintenance** but want an extra layer of protection, especially in **tropical or high-stress conditions**.

- You are preparing for a **major overhaul** or selling the engine, as a clean system improves resale value.

**Skip the flushing kit if:**

- Your engine is **new or has low hours** (under 200 hours) and you use **high-quality synthetic oil** with proper change intervals.

- You follow a **strict oil change schedule** (every 50 hours or as recommended) and the engine runs smoothly with clean oil.

- You are on a **tight budget** and cannot justify the additional cost without clear signs of engine degradation.

For most Mercury outboard owners who prioritize long-term engine health, the flushing kit is a worthwhile investment especially when used periodically rather than as a one-time solution. Always pair it with high-quality oil and filters for optimal results.

Details:

The Mercury Quicksilver 44357Q2 Flushing Kit is a product designed for flushing outboard engines, specifically engines. It includes necessary components for the flushing process, such as a nozzle and connector fitting. Made in the USA, this kit is a genuine Mercury product and does not come with any modifications or custom bundles.

part #: 44357q2 prices

  • $25.00-$39.00

specifications ouboaen:

  • for makes: Mercury
  • mpn: 44357q2
  • including: Products As Shown In The Picture
  • custom bundle: No
  • country of origin: United States
  • california prop 65 warning: This Product Contains Chemicals Known To The State Of California To Cause Cancer

shipping ouboaen:

  • transit: 3-8 Days
  • carrier: USPS
  • cost: $8.61
  • type: Calculated
  • class: Standard
  • service: USPS Ground Advantage

general ouboaen:

  • condition: New
  • Boat Parts > Outboard Engines Components > Other

returns ouboaen:

  • time: 30 Days
  • paid by: Seller
  • policy: Returns Accepted

payments ouboaen:

  • other
  • wallet: Paypal
  • credit card: Discover

offer ouboaen:

  • options: Ship-to-home
  • availability: In Stock
  • sold: 0
  • started: May 19, 2026
  • quantity: 3
  • best offers: True

seller ouboaen:

  • city: Brillion, Wisconsin
  • rating: 99.4%
  • # reviews: 335
for makes: mercury, including: products as shown in the picture, custom bundle: no, country of origin: united states, california prop 65 warning: this product contains chemicals known to the state of california to cause cancer,
category: boat parts > outboard engines components, sku: 24041007223378721,
Mercury 44357Q2 Is Similar To:
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5 offers $25.00–$39.00 USD
  • New. Offer #1 priced at $35.00 + $10.69 shipping estimate = $45.69* total. Mercury and Mariner V-6 outboards 2000 model year and newer and Mercury MerCrusier Bravo One sterndrives.+$10.69 shipping
  • New. Offer #2 priced at $39.00 + $8.61 shipping estimate = $47.61* total. Made in the United States, this kit is a genuine Mercury product and does not come with any modifications or custom bundles The Mercury Quicksilver Flushing Kit is a product designed for flushing outboard engines, specifically Mercury engines.+$8.61 shipping
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  • New. Offer #4 priced at $34.99 + $0.00 shipping estimate = $34.99* total. Trim Tab Components. Flushing Kit.FREE SHIPPING
  • New. Offer #5 priced at $28.00 + $16.45 shipping estimate = $44.45* total. With the manufacturer part number , this product is a reliable and original solution for keeping your boat's engine in top condition Brand New.+$16.45 shipping

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