1. Watercraft Intake & Fuel Systems Products
  2. sku: 15903800941831723
  3. MERCURY 1300-8M0109536

MERCURY 1300-8M0109536 Tohatsu Outboard Carburetor 20HP

fits make: Mercury.

1300-8m0109536 Mercury Tohatsu Outboard Oem 20hp Carburetor Assy 8m0109536

( Manufacturer Part Number: 1300-8M0109536 ), ( Part Type: Carburetor )

Review MERCURY Tohatsu Outboard Oem 20hp Carburetor Assy 8m0109536

The **Mercury 1300-8M0109536 Tohatsu Outboard Motor (20HP, Carbureted)** is a compact yet powerful marine propulsion system designed for small to mid-sized boats, offering a perfect blend of efficiency, reliability, and ease of use. Part of the trusted Tohatsu brand, which is renowned for its durable and fuel-efficient outboard engines, this 20 horsepower model is engineered to deliver smooth performance while maintaining low operational costs. The **8M0109536 carburetor** is a key component of this engine, ensuring precise fuel-air mixture regulation for optimal combustion, which translates to consistent power delivery and improved fuel economy. This outboard features a **2-stroke design**, known for its simplicity and responsiveness, making it ideal for recreational boating, fishing, or light duty applications on lakes, rivers, and coastal waters. The **1300-series** designation indicates a lightweight yet robust construction, with a **direct-drive system** that eliminates the need for a separate gearcase, reducing maintenance requirements while maximizing efficiency. The engine s compact dimensions designed to fit seamlessly into smaller boat transoms make it a versatile choice for everything from trolling to leisurely cruising. Built with corrosion-resistant materials and a sealed cooling system, this outboard is well-suited for both freshwater and saltwater environments, though regular maintenance is recommended for prolonged saltwater exposure. The **carbureted fuel system** allows for easy tuning and adjustments, catering to different load conditions without the complexity of modern fuel-injection setups. Whether used in a small jon boat, a fishing skiff, or a personal watercraft, this Mercury-Tohatsu 20HP outboard provides a balance of affordability and performance, ensuring reliable operation for years with proper care. Its straightforward design also makes it an excellent option for DIY enthusiasts looking to maintain or upgrade their own vessels.

### **Pros and Cons of Buying a Mercury 1300 8M0109536 (Tohatsu Outboard, 20HP Carburetor)**

#### **Pros:**

1. **Reliability and Brand Reputation** Mercury and Tohatsu are well-known for producing durable outboards, especially in the 20HP class. These engines are designed for small boats, fishing vessels, and personal watercraft, where consistent performance is crucial.

2. **Fuel Efficiency** At 20HP, this engine is designed for smaller boats, making it fuel-efficient compared to larger outboards. It s ideal for trolling, fishing, or leisurely cruising where power isn t the primary concern.

3. **Lightweight and Easy to Handle** The 20HP displacement means the engine is compact and lightweight, making it easier to install, remove, and transport. This is beneficial for smaller boats where weight distribution matters.

4. **Lower Maintenance Costs** Smaller outboards generally require less frequent maintenance than larger engines. The carbureted system (though older) is simpler than modern fuel-injected models, which can be easier and cheaper to repair.

5. **Affordability** Used 20HP outboards like this are typically cheaper than newer models, making them a budget-friendly option for basic boating needs.

6. **Compatibility with Small Boats** If you have a small boat (e.g., a dinghy, kayak, or lightweight fishing vessel), this engine will provide adequate power without overloading the hull.

7. **Ease of Rebuilding** Many 20HP Tohatsu/Mercury engines are rebuildable, meaning you can restore them to like-new condition if they develop issues, rather than replacing the entire engine.

8. **Proven Performance** These engines have been around for decades, meaning their mechanics are well-documented, and replacement parts are widely available.

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#### **Cons:**

1. **Age and Wear** This engine appears to be from the late 1990s or early 2000s (based on the model number). Older carbureted engines are prone to carbon buildup, fuel system clogs, and wear on critical components like pistons, rings, and bearings.

2. **Carburetor Reliability Issues** Carbureted engines are less efficient and more prone to tuning problems than modern fuel-injected models. They require regular cleaning and adjustment to maintain proper fuel-air mixture, which can be finicky in varying conditions.

3. **Emissions Concerns** Older carbureted engines do not meet modern emissions standards and may produce more pollution, which could be an issue if boating in environmentally sensitive areas.

4. **Limited Power for Demanding Use** At 20HP, this engine is not suitable for high-speed planing, heavy fishing (e.g., pulling large fish or deep-sea trolling), or towing watercraft. It s best for calm waters and light use.

5. **Potential for Hidden Damage** Without a thorough inspection, you may not discover issues like:

- **Worn crankshaft or bearings** (common in older engines).

- **Leaking seals or gaskets** (leading to oil or coolant loss).

- **Rod or piston damage** (from overheating or lack of maintenance).

- **Transmission wear** (if the engine is used for frequent starts/stops).

6. **Depreciation** Older outboards lose value quickly, and parts may become harder to find as production stops. Replacement parts for discontinued models can be expensive.

7. **Fuel and Performance Degradation** Ethanol blends in modern fuel can damage older carbureted engines, leading to clogs and poor performance. Running on old or contaminated fuel can also cause starting issues.

8. **Noise and Vibration** Older engines tend to be noisier and may vibrate more than modern counterparts, which can be uncomfortable during long trips.

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### **Conclusion:**

The **Mercury 1300 8M0109536 (Tohatsu 20HP carbureted outboard)** is a **good budget-friendly option** for **light-duty boating** (e.g., trolling, small fishing trips, or calm-water cruising) if:

- You find it in **good condition** with **minimal wear**.

- You are **willing to perform maintenance** (carburetor cleaning, oil changes, spark plug checks).

- You **don t need high performance** this engine is not for speed or heavy loads.

- You **have access to replacement parts** (or are prepared to rebuild it).

However, if you are looking for a **long-term, low-maintenance engine**, a **modern fuel-injected outboard** (even a slightly larger but newer model) would be a better investment due to improved reliability, efficiency, and emissions compliance.

If you **inspect the engine thoroughly** (or have a mechanic do so) and confirm:

No internal damage (check compression, listen for unusual noises).

No major leaks (oil, coolant, fuel).

Carburetor is clean and functioning properly.

Transmission shifts smoothly.

No excessive vibration or rough idling.

then it **can be a solid purchase for the right use case**. Otherwise, consider a **newer or slightly larger engine** if your budget allows.

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

- You need a **cheap, simple engine** for **occasional, light use** on small boats.

- You are **comfortable with basic maintenance** and can **rebuild it if needed**.

- You **don t mind the limitations** (no high speed, potential fuel issues with modern fuel).

- **Avoid it if:**

- You plan to **use it frequently or for demanding tasks** (fishing heavy loads, towing, high-speed boating).

- You **cannot inspect it thoroughly** before purchase (get a **pre-purchase inspection**).

- You want **modern reliability and emissions compliance**.

- You **don t have access to parts or mechanical skills** to maintain it.

**Alternative Considerations:**

- A **used 25-30HP modern fuel-injected outboard** (e.g., Yamaha, Mercury, Tohatsu newer models) may cost slightly more but offers **better reliability, fuel efficiency, and longevity**.

- If you only need **trolling power**, a **small electric outboard** (e.g., Torqeedo, Johnson Evinrude) could be a **zero-maintenance, eco-friendly** alternative.

Ultimately, this engine is **best suited for hobbyists or those on a tight budget** who prioritize **low cost over performance and longevity**. For serious boaters, a newer model would be the smarter long-term choice.

Details:

Mercury Tohatsu Outboard OEM 20HP Carburetor Assay 8M0109536. The compression was low on a cylinder. This was taken off of a 2013 Mercury four stroke. This does come exactly as you see pictured.

part #: 13008m0109536 price

  • $150.00

specifications jetskiintakeez:

  • for makes: Mercury
  • mpn: 1300-8m0109536
  • part type: Carburetor

offer jetskiintakeez:

  • quantity: 1
  • started: May 3, 2026
  • options: Ship-to-home
  • availability: In Stock
  • sold: 0

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  • carrier: USPS
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general jetskiintakeez:

  • Parts Accessories > Personal Watercraft Parts > Intake Fuel Systems
  • condition: Used

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  • city: Lenoir City, Tennessee
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for makes: mercury, part type: carburetor,
category: watercraft parts > intake fuel systems, sku: 15903800941831723,
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  • Used. Offer #1 priced at $150.00 + $18.30 shipping estimate = $168.30* total. Box81 Mercury Tohatsu Outboard OEM 20HP Carburetor Assy 8M0109536.+$18.30 shipping

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