YAMAHA 6H4-21707-01-00 Cap Oil Tank Freshwater

( Manufacturer Part Number: 6H4-21707-01-00 ), ( Part Type: Oil Cap Tank ), ( Country Of Origin: United States )

Review YAMAHA Broken Cap Oem Oil Tank Freshwater

The **Yamaha 6H4-21707-01-00 Cap Oil Tank** is a precision-engineered component designed specifically for Yamaha s outboard motors, ensuring optimal performance, longevity, and reliability in marine applications. Crafted from high-quality materials, this oil tank cap is built to withstand the harsh conditions of saltwater exposure, UV radiation, and constant mechanical stress while maintaining a tight, leak-proof seal. The durable construction features a robust, corrosion-resistant design that prevents degradation over time, even in prolonged use, making it an essential part of maintaining your engine s internal lubrication system. This part is engineered to fit seamlessly with Yamaha s outboard motor models, providing a secure and efficient connection to the oil tank, which is critical for proper oil circulation and cooling. The cap s precise fit ensures minimal oil loss and contamination, helping to extend the life of your engine s internal components. Whether you re operating in freshwater lakes, coastal waters, or saltwater environments, this oil tank cap delivers consistent performance, reducing the risk of leaks, spills, or operational interruptions. Ideal for both new installations and replacements, it is a straightforward yet vital upgrade for any Yamaha outboard owner looking to preserve their engine s efficiency and reliability. With its reliable build and compatibility with Yamaha s outboard systems, this part is a testament to the brand s commitment to quality and durability in marine engineering.

### **Pros and Cons of buying a Yamaha 6H4-21707-01-00 Cap Oil Tank (Freshwater Tank for Outboard Motors)**

1. **Compatibility** This part is specifically designed for Yamaha outboard motors, ensuring a proper fit and reliable performance. It is part of the **6H4** series, which includes popular models like the **Yamaha 6.0L, 6.5L, and 7.0L outboards** (e.g., F200, F250, F300, F350, F400, F450, and some F600 models). If your motor uses this exact part number, it will integrate seamlessly.

2. **Durability** Yamaha parts are generally built to high standards, using materials that resist corrosion and wear over time. The oil tank cap is typically made from sturdy plastic or metal, ensuring longevity if properly maintained.

3. **Easy Installation** Replacing the oil tank cap is a straightforward DIY task that usually requires minimal tools (often just a wrench or socket). No major modifications are needed, and the process typically takes less than 30 minutes.

4. **Prevents Contamination** A properly sealed oil tank cap prevents dirt, water, and debris from entering the oil system, which can extend the life of your engine and reduce the risk of clogs or damage.

5. **Cost-Effective** Compared to labor costs for professional installation, buying and replacing the part yourself saves money. The price of the part alone is relatively low (typically under $20 $40, depending on the source).

6. **Prevents Oil Leaks** If your current cap is cracked or damaged, replacing it can stop oil leaks, which are both messy and harmful to the environment.

7. **Part of Routine Maintenance** Replacing the oil tank cap as part of regular outboard maintenance (e.g., oil changes) can help identify other potential issues early, such as worn gaskets or loose fittings.

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1. **Potential Counterfeit Parts** If purchasing from an untrusted seller (e.g., third-party online marketplaces without authentication), there is a risk of receiving a **fake or low-quality replica**. Always buy from **authorized Yamaha dealers, official distributors, or reputable marine supply stores** to avoid this.

2. **Mismatched Part Number** Double-checking the exact part number is critical. A wrong cap (e.g., one for a different Yamaha model or even a different brand) may not fit properly, leading to leaks or improper sealing. Always verify compatibility with your motor s **service manual or Yamaha s part lookup tool**.

3. **Gasket Replacement Needed** While the cap itself may be fine, the **rubber gasket** inside can degrade over time. If the gasket is worn, it may not seal correctly, leading to leaks. You may need to purchase a new gasket separately (often included in some kits).

4. **Limited Availability** Depending on your location, this part may not be readily available at local marine stores. Online retailers (e.g., Amazon, Yamaha s website, or specialty marine parts suppliers) may be necessary, which could involve shipping delays.

5. **DIY Risk for Inexperienced Users** While the replacement is simple, improper handling (e.g., stripping threads, damaging the oil filler neck, or not tightening the cap correctly) could cause leaks or damage. If unsure, consulting a mechanic may be wise.

6. **No Warranty on Aftermarket Parts** If purchasing from a non-authorized seller, the part may not come with a warranty. Yamaha s genuine parts typically include a warranty, providing peace of mind.

7. **Environmental Concerns** If the old cap is not disposed of properly, it could contribute to pollution. Ensure proper disposal (recycling or taking it to a hazardous waste facility if it contains residual oil).

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The **Yamaha 6H4-21707-01-00 oil tank cap** is a **practical and cost-effective replacement part** for compatible Yamaha outboard motors, offering durability and ease of installation. It is a **routine maintenance item** that helps prevent leaks, contamination, and engine damage. However, **buying from untrusted sources, mismatched part numbers, or improper installation** can negate these benefits and even cause further issues.

For most boat owners with basic mechanical skills, replacing this part is a **quick and worthwhile upgrade**. The key to success lies in **verifying compatibility, sourcing the part from a reputable dealer, and ensuring a proper seal** during installation.

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1. **Verify Compatibility** Confirm that your Yamaha outboard motor model **exactly matches** the 6H4 series (check your motor s label or service manual). If unsure, use Yamaha s **part lookup tool** on their official website.

2. **Purchase from an Authorized Source**

- **Best option:** Buy directly from **Yamaha Marine s official dealer network** or an **authorized marine parts distributor** (e.g., West Marine, Sea-Doo/Yamaha dealers, or MarineMax).

- **Alternative:** Reputable online retailers like **Amazon (with seller reviews), BoatUS Parts, or Marine Parts Express** but **avoid unknown third-party sellers** to prevent counterfeit parts.

3. **Check for a Gasket** Some caps come with a gasket; if not, purchase a **Yamaha-compatible oil tank gasket** (e.g., part # **6H4-21707-00-00** or similar) to ensure a proper seal.

4. **Follow Installation Steps Carefully**

- Drain excess oil if necessary.

- Clean the threads and filler neck.

- Apply a **light coat of marine grease** to the gasket (if applicable) for better sealing.

- Tighten the cap **firmly but not excessively** to avoid stripping.

5. **Consider Professional Help if Needed** If you re uncomfortable with DIY repairs, a **marine mechanic** can install it for you (though this adds cost).

6. **Dispose of the Old Cap Properly** Remove any residual oil from the old cap before recycling or disposing of it at a hazardous waste facility.

- Your motor is confirmed to require this exact part.

- You purchase it from a **trusted, authorized source**.

- You are prepared to replace the gasket if needed.

- You cannot confirm compatibility with your motor.

- The seller lacks reviews or is not a known marine parts dealer.

- You are unsure about installation and cannot seek professional help.

For most Yamaha outboard owners, this is a **simple, low-cost, high-reward replacement** that should be part of regular maintenance.

Details:

Good used Broken cap Yamaha OEM Oil Tank 6H4-21707-01-00 Freshwater. Shipping is only to the lower 48 states. The engine this part came from was run in freshwater only.

part #: 6h4217070100 prices

• $65.00-$74.99

specifications ouboaen:

• for makes: Yamaha
• mpn: 6h4-21707-01-00
• part type: Oil Cap Tank
• country of origin: United States

seller ouboaen:

• # reviews: 890
• rating: 99.9%
• city: Clarksville, Michigan

general ouboaen:

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

payments ouboaen:

• credit card: Diners-club
• other
• wallet: Apple-pay

shipping ouboaen:

• cost: $0.00
• service: Economy
• transit: 3-7 Days
• class: Economy
• type: Fixed

returns ouboaen:

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

offer ouboaen:

• availability: In Stock
• sold: 0
• quantity: 1
• started: May 26, 2026
• options: Ship-to-home

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