1. Boat Outboard Engines To Buy
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  3. MERCURY FO13949

MERCURY FO13949 Outboard Carburetor Fuel Jet .086

fits make: Mercury.

Fo13949 Mercury Genuine Outboard Carburetor .086 Main Fuel Jet New Oem

( Manufacturer Part Number: FO13949 ), ( Part Type: Fuel Jet Carburetor )

Review MERCURY Genuine Outboard Carburetor .086 Main Fuel Jet New Oem

The **Mercury FO13949 Outboard Carburetor (086 Fuel Jet)** is a precision-engineered component designed exclusively for Mercury outboard motors, specifically tailored to enhance performance, fuel efficiency, and reliability in marine applications. This carburetor is part of Mercury s high-performance lineup, featuring a robust and durable construction that ensures consistent operation under demanding conditions, whether cruising at leisure or pushing through high-speed maneuvers. The **086 fuel jet** designation indicates a carefully calibrated orifice size, optimized to deliver the precise fuel-air mixture required for optimal combustion in modern outboard engines, balancing power output with fuel economy. Built with high-grade materials, including corrosion-resistant metals and sealed components, this carburetor is engineered to withstand the harsh marine environment, including exposure to saltwater, humidity, and temperature fluctuations, which can degrade lesser-quality parts over time. Its design incorporates a **floating bowl system** that maintains a steady fuel level, preventing airlocks and ensuring smooth throttle response, while the **piston-driven pump mechanism** guarantees reliable fuel delivery even under varying load conditions. The FO13949 is compatible with a range of Mercury outboard models, including those from the **400 to 600 HP series**, making it a versatile upgrade for both stock and modified engines seeking improved throttle response and fuel atomization. Whether used in recreational boats, fishing vessels, or performance yachts, this carburetor exemplifies Mercury s commitment to performance engineering, offering boat owners a reliable way to maximize engine efficiency and longevity. Proper installation and regular maintenance, including periodic cleaning of the fuel jets and checking for leaks, will further extend its service life and ensure peak performance.

**Pros and Cons of buying a Mercury FO13949 Outboard Carburetor (086 Fuel Jet)**

The Mercury FO13949 is a carburetor designed for older Mercury outboard motors, particularly those from the mid-2000s era. Below is a detailed breakdown of its advantages and disadvantages.

### **Pros**

1. **Compatibility with Older Engines** This carburetor is specifically engineered for Mercury outboards from the 2000s, including models like the 90 HP, 115 HP, and 150 HP series. If your engine uses the FO13949, it will fit without modification.

2. **OEM Quality** Mercury is a well-known brand with a reputation for durable marine components. The FO13949 is a factory-replacement part, meaning it meets the same manufacturing standards as the original.

3. **Proper Fuel Jet (086) for Performance** The 086 fuel jet is optimized for better fuel-air mixture, which can improve throttle response, smoothness, and fuel efficiency compared to a stock or incorrect jet size.

4. **Easier Maintenance & Tuning** Since it s a carburetor, it allows for easier adjustments (like idle mixture screws) compared to fuel-injected systems. If you re familiar with carburetor tuning, you can fine-tune performance.

5. **Cost-Effective Replacement** Compared to rebuilding an old carburetor or replacing an entire engine, purchasing a new FO13949 is often a budget-friendly solution.

6. **Improved Cold-Start Performance** A properly adjusted carburetor with the right jet can help with cold weather starts, reducing the risk of flooding or rough idling.

7. **Aftermarket Support** Mercury carburetors have a strong aftermarket presence, meaning you can find replacement parts, gaskets, and tuning guides if needed.

### **Cons**

1. **Limited Longevity Compared to Fuel Injection** Modern outboards (post-2010s) increasingly use fuel injection, which is more reliable and efficient. If your engine is older but still running, a carburetor may eventually wear out or develop leaks.

2. **Maintenance Requirements** Carburetors require periodic cleaning, jet adjustments, and gasket replacements. If you neglect maintenance, performance will degrade over time.

3. **Potential for Fuel Leaks** Older carburetors can develop leaks at gaskets or seals, leading to fuel spills and potential fire hazards. This is more common if the engine has been sitting unused for a long time.

4. **Less Efficient Than Fuel Injection** Carburetors are less precise in fuel delivery compared to modern fuel-injected systems, which can lead to slightly worse fuel economy and emissions.

5. **Difficulty Finding Parts for Very Old Engines** While the FO13949 is relatively common, some older Mercury models may have rare or discontinued components, making repairs more challenging.

6. **Adjustment Sensitivity** Getting the carburetor perfectly tuned requires some mechanical skill. If not adjusted correctly, you may experience rough idling, hesitation, or excessive fuel consumption.

7. **Environmental Concerns** Older carbureted engines may not meet modern emissions standards, which could be an issue if you re operating in regulated areas.

### **Ending Conclusion**

The Mercury FO13949 carburetor (with the 086 fuel jet) is a solid choice if you have an older Mercury outboard that still runs well and you re willing to maintain it properly. It offers better performance than a worn-out original carburetor and is a cost-effective upgrade. However, if your engine is very old or you re looking for long-term reliability, a fuel-injected replacement (if available) or a full engine rebuild might be worth considering.

### **Recommendation**

- **Buy the FO13949 if:**

- Your engine is running but has performance issues (rough idling, poor throttle response).

- You re comfortable with basic carburetor tuning and maintenance.

- You want a quick, affordable fix before considering a more extensive overhaul.

- **Consider alternatives if:**

- Your engine is extremely old (pre-2000s) and parts are hard to find.

- You re not willing to perform regular maintenance.

- You re looking for the most reliable long-term solution (in which case, a fuel-injected outboard or a rebuilt engine may be better).

If you proceed with the FO13949, ensure you have the correct gaskets, a carburetor cleaner, and basic tools for installation and adjustment. Proper tuning will maximize its benefits.

Details:

Genuine Mercury Outboard Carburetor .086 Main Fuel Jet, Part Number FO13949, Please verify compatibility with a dealer before purchase.

part #: fo13949 price

  • $17.19

specifications ouboaen:

  • for makes: Mercury
  • mpn: Fo13949
  • part type: Fuel Jet Carburetor

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  • transit: 5-11 Days
  • carrier: USPS
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  • type: Fixed
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general ouboaen:

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

offer ouboaen:

  • availability: In Stock
  • sold: 0
  • started: April 18, 2026
  • quantity: 1
  • options: Ship-to-home

seller ouboaen:

  • rating: 99.7%
  • city: Elizabethton, Tennessee
  • # reviews: 11076

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  • time: 30 Days
for makes: mercury, part type: fuel jet carburetor,
category: boat parts > outboard engines components, sku: 23384430924292891,
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