1. Boat Outboard Engines To Buy
  2. sku: 23050067871044752
  3. YAMAHA 6H1-43820-00-00

YAMAHA 6H1-43820-00-00 Piston 90HP 0720

fits make: Yamaha.

6h1-43820-00-00 Yamaha Oem 90hp Piston Sub Assembly 0720

( Manufacturer Part Number: 6H1-43820-00-00 ), ( Part Type: Piston ), ( Disclaimer: All Parts Come As Pictured. )

Review YAMAHA Oem 90hp Piston Sub Assembly

The **Yamaha 6H1-43820-00-00 90 Horsepower Piston Engine** is a robust and high-performance outboard motor designed for demanding marine applications, offering a perfect blend of power, reliability, and efficiency. Part of Yamaha s legendary **6H1 series**, this engine is engineered to deliver exceptional performance in both recreational and commercial settings, making it an ideal choice for boats ranging from mid-sized fishing vessels to high-speed cruisers. With a **90 horsepower output**, it provides ample thrust for smooth acceleration, stable handling, and the ability to tackle challenging water conditions with ease. The engine features Yamaha s advanced **piston design**, incorporating precision-machined components and high-quality materials to ensure durability and longevity, even under the most demanding operating conditions.

This outboard is built with Yamaha s signature **reliability and innovation**, featuring a **four-stroke, liquid-cooled architecture** that optimizes fuel efficiency while minimizing emissions. The **direct injection system** enhances combustion efficiency, reducing fuel consumption and extending engine life, while the **electronic fuel injection (EFI)** ensures precise fuel delivery for consistent power and smooth operation. The **digital ignition system** further refines performance by optimizing spark timing, resulting in improved throttle response and reduced wear on critical components. Whether navigating open waters, fishing in rough seas, or cruising at high speeds, this engine delivers the power and responsiveness required to keep up with even the most adventurous marine activities.

For ease of use and maintenance, the **6H1-43820-00-00** is equipped with Yamaha s intuitive **digital control panel**, allowing operators to monitor engine performance, adjust settings, and access diagnostic information with minimal effort. The **low-vibration design** ensures a comfortable ride, reducing fatigue for both the operator and passengers, while the **corrosion-resistant materials** and **sealed components** protect against saltwater corrosion, making it well-suited for coastal and offshore applications. Additionally, the engine s **compact yet powerful frame** allows for easy installation on a variety of boat models, from sportfishing boats to utility vessels, without compromising on performance.

Built to last, this Yamaha outboard incorporates **high-strength aluminum construction** in key areas, reducing weight while maintaining structural integrity, and features a **durable transmission system** with optimized gear ratios for seamless power transfer. The **self-cleaning water intake** minimizes clogging from debris, ensuring consistent performance even in murky or shallow waters. Whether used for daily fishing trips, weekend getaways, or professional applications, the **Yamaha 6H1-43820-00-00 90HP Piston Engine** stands as a testament to Yamaha s commitment to excellence in marine propulsion, offering a perfect balance of power, efficiency, and dependability for any boating enthusiast.

### Yamaha 6H1-43820-00-00 (90HP Piston Engine, Model Year 2007) Pros and Cons

#### **Pros:**

1. **Reliability and Durability** Yamaha s piston engines are known for their robust construction and longevity, especially in marine applications. The 6H1 series is a well-regarded model with a strong reputation for durability, particularly when properly maintained.

2. **Power and Performance** The 90HP output provides sufficient power for mid-sized boats, offering good acceleration and cruising speed. This makes it suitable for fishing boats, cruisers, and small offshore applications where moderate horsepower is required.

3. **Fuel Efficiency** Compared to modern outboard engines, piston engines like this one tend to be more fuel-efficient in certain conditions, especially when running at moderate speeds. They also handle rough water better than some modern sterndrives in extreme conditions.

4. **Simplicity and Repairability** Piston engines are generally easier to diagnose and repair than modern electronic fuel-injected outboards. Many mechanics are familiar with Yamaha piston engines, and parts are widely available, even for older models.

5. **Lower Initial Cost** Compared to newer Yamaha outboards or sterndrives with similar horsepower, this engine is significantly cheaper upfront, making it an attractive option for budget-conscious buyers.

6. **Proven Track Record** The 6H1 series has been in production for decades, meaning there is a wealth of user experience, maintenance guides, and aftermarket support available.

7. **Good for Rough Water** Piston engines often handle choppy or rough water better than some modern sterndrives, which can be more sensitive to wave action.

8. **Resale Value** While not as high as newer models, a well-maintained Yamaha piston engine still holds some resale value, especially in niche markets like fishing or older boat applications.

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#### **Cons:**

1. **Age and Wear** This engine is from 2007, meaning it has likely accumulated significant hours of use. Older engines may require more frequent maintenance, such as valve adjustments, piston ring replacements, or crankshaft inspections, which can add up in costs over time.

2. **Emissions and Regulations** Modern marine engines are subject to stricter emissions standards (e.g., EPA Tier 3 or EU Tier 3). While this engine may still meet older standards, future regulations could make it harder to use in certain areas, particularly in the U.S. or Europe.

3. **Fuel System Limitations** Older piston engines often rely on carburetors or less sophisticated fuel injection systems, which can be less efficient and more prone to clogging or tuning issues compared to modern electronic fuel injection.

4. **Noise and Vibration** Piston engines tend to be noisier and vibrate more than modern outboards, which can be less comfortable for passengers and may require additional soundproofing or vibration dampening in the boat.

5. **Limited Modern Features** Unlike newer Yamaha outboards, this engine lacks features like digital dashboards, remote start, or advanced diagnostics. It also may not integrate well with modern boat electronics.

6. **Parts and Service Challenges** While parts are available, some components (e.g., gaskets, seals, or specialized tools) may be harder to find than for newer models. Service centers specializing in older engines may be less common.

7. **Fuel and Oil Requirements** Older engines often require specific fuel blends (e.g., ethanol-free or lower-octane fuel) and may need premium oil formulations, which can be more expensive than what newer engines require.

8. **Potential for Hidden Damage** Without a thorough inspection, there could be undetected issues such as worn bearings, cracked cylinder heads, or fuel system leaks. Buying used always carries some risk of hidden problems.

9. **Resale Depreciation** Piston engines, even well-maintained ones, tend to depreciate faster than newer outboards. If you plan to sell later, you may not recoup as much as you invested.

10. **Environmental Concerns** Older engines contribute more to air pollution and may not meet current environmental standards in some regions, limiting where you can operate the boat.

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### **Conclusion:**

The Yamaha 6H1-43820-00-00 (90HP piston engine from 2007) is a solid choice if you prioritize **reliability, simplicity, and cost-effectiveness** for a mid-sized boat. It excels in rough water conditions and offers good power for its class, making it ideal for fishing, cruising, or older boat applications where modern electronics aren t a priority. However, its age introduces risks such as **higher maintenance costs, emissions concerns, and limited modern features**. If you re willing to invest time in upkeep and don t mind the trade-offs, this engine can be a great value. If you prefer newer technology, better fuel efficiency, or lower long-term costs, a modern outboard or sterndrive might be a better investment.

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### **Recommendation:** - **Buy if:**

- You need a **budget-friendly, powerful engine** for a boat that doesn t require cutting-edge technology.

- You re comfortable with **regular maintenance** (e.g., valve adjustments, fuel system cleaning) and have access to a mechanic familiar with piston engines.

- The boat will primarily operate in **rough or shallow water** where piston engines perform better.

- You plan to **keep the boat long-term** and don t mind the engine s age.

- **Avoid if:**

- You want **modern features** like digital dashboards, remote start, or advanced diagnostics.

- You re concerned about **emissions regulations** or future restrictions on older engines.

- You prefer **lower long-term costs** and don t want to deal with potential wear-and-tear issues.

- The boat will be used in **calm waters** where a modern outboard would be more efficient and comfortable.

**Final Suggestion:** If you decide to purchase this engine, **get a professional inspection** (preferably from a Yamaha specialist) to assess its condition, service history, and any potential hidden issues. Consider also **upgrading the fuel system or emissions components** if required by local regulations. If possible, test the engine in the boat before finalizing the purchase to ensure it runs smoothly.

Details:

Good Condition, Ready To Install.

part #: 6h1438200000 prices

  • $30.00-$280.95

specifications ouboaen:

  • for makes: Yamaha
  • mpn: 6h1-43820-00-00
  • part type: Piston
  • disclaimer: All Parts Come As Pictured.

general ouboaen:

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

returns ouboaen:

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

shipping ouboaen:

  • class: Standard
  • carrier: USPS
  • service: USPS Ground Advantage
  • transit: 5-11 Days
  • type: Fixed
  • cost: $0.00

seller ouboaen:

  • # reviews: 36316
  • city: Gardena, California
  • rating: 99.5%

offer ouboaen:

  • sold: 0
  • options: Ship-to-home
  • availability: In Stock
  • started: April 2, 2026
  • quantity: 2

payments ouboaen:

  • wallet: Paypal
  • credit card: Mastercard
  • other
for makes: yamaha, part type: piston, disclaimer: all parts come as pictured.,
category: boat parts > outboard engines components, sku: 23050067871044752,
Yamaha 6H1-43820-00-00 Is Similar To:
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5 offers $30.00–$280.95 USD
  • Used. Offer #1 priced at $30.00 + $0.00 shipping estimate = $30.00* total. Good Condition, Ready To Install.FREE SHIPPING
  • New. Offer #2 priced at $280.95 + $0.00 shipping estimate = $280.95* total. High Performance ring kit and alloy pin included with each piston kit for extended life and sustained power.FREE SHIPPING
  • Used. Offer #3 priced at $40.00 + $0.00 shipping estimate = $40.00* total. FREE SHIPPING
  • Used. Offer #4 priced at $150.00 + $15.00 shipping estimate = $165.00* total. OEM 6DA-W1164-00-00 Yamaha 70 90 HP 2005 2006 2007 Piston & Connecting Rod Ay .+$15.00 shipping
  • Used. Offer #5 priced at $67.97 + $0.00 shipping estimate = $67.97* total. FREE SHIPPING

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