TILLOTSON MT93A Sears Clinton Carburetor 3.5HP

( Brand: Tillotson ), ( Manufacturer Part Number: MT93A ), ( Part Type: 5hp Carburetor ), ( Country Of Origin: Japan )

Review TILLOTSON Sears Clinton 3.5hp Carburetor

The **Tillotson MT93A Carburetor**, originally designed for the legendary **Sears Clinton 3.5 HP outboard motor**, is a meticulously crafted, air-cooled, two-stroke engine component that embodies both durability and performance in marine applications. This carburetor, manufactured by Tillotson, a trusted name in carburetion technology since the early 20th century, features a robust **cast aluminum body** with precision-machined passages to ensure optimal fuel-air mixture delivery. The MT93A operates on a **piston-type pump mechanism**, where the rising and falling piston within the carburetor body creates a vacuum that draws fuel from the float chamber while regulating airflow through a carefully calibrated **venturi throat**. The float system, housed in a sealed chamber, maintains a consistent fuel level, preventing overflow while ensuring a steady supply of gasoline to the engine. This carburetor is equipped with an **adjustable throttle linkage**, allowing operators to fine-tune engine speed and responsiveness, making it ideal for both recreational boating and light-duty fishing applications. The Tillotson MT93A is designed to work seamlessly with the **Clinton 3.5 HP outboard s** single-cylinder, two-stroke engine, delivering reliable power in the 3.5 horsepower range while maintaining efficiency. Its compact yet sturdy design ensures easy installation and minimal maintenance, with key components such as the **piston, diaphragm, and fuel jets** engineered for longevity. Whether restoring a vintage Clinton outboard or maintaining a classic watercraft, this carburetor remains a dependable choice, offering a blend of historical craftsmanship and functional reliability for enthusiasts seeking both performance and authenticity.

### Pros and Cons of Buying a Tillotson MT93A (Sears Clinton 3.5HP) Carburetor

1. **Compatibility** The Tillotson MT93A is a well-documented carburetor designed specifically for Sears Clinton 3.5HP engines, ensuring a direct fit without major modifications. This reduces the risk of installation issues and improves reliability.

2. **Performance Reliability** Tillotson carburetors are known for their durability and consistent performance in small engines, particularly in lawnmowers and outdoor power equipment. The MT93A is no exception, offering stable fuel delivery and smoother operation compared to some generic or aftermarket alternatives.

3. **Ease of Maintenance** The design of the MT93A allows for straightforward cleaning and adjustment. The float bowl is accessible, and the jets can be cleaned or replaced without complex tools, making routine maintenance manageable for DIYers.

4. **Availability of Parts** Tillotson is a trusted brand with a long history in the small engine industry. Spare parts, such as gaskets, jets, and seals, are widely available, either through Tillotson directly or through third-party suppliers. This ensures longevity and the ability to repair the carburetor if needed.

5. **Proven Track Record** The Sears Clinton 3.5HP engine was widely used in lawnmowers and other equipment in the mid-20th century. The MT93A carburetor was the original or OEM choice for many of these units, meaning it has been tested and proven effective in real-world conditions over decades.

6. **Cost-Effective Upgrade** If your engine is running poorly due to a failing carburetor, replacing it with an MT93A can restore performance without the need for a full engine overhaul. It is often more affordable than purchasing a new engine or a complete mower.

7. **Compatibility with Modifications** While the MT93A is designed for stock performance, it can often be tuned or modified (e.g., adjusting jets or using performance additives) to improve throttle response or fuel efficiency if needed.

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1. **Age and Wear** The Tillotson MT93A, like many carburetors from the mid-20th century, may exhibit signs of wear or deterioration if the unit has been stored for an extended period. Rubber seals and gaskets can dry out or crack, leading to leaks or poor sealing.

2. **Limited Modern Support** While Tillotson still exists, its focus has shifted toward larger engines and commercial applications. Support for vintage models like the MT93A may be less responsive compared to newer products. You may need to rely on third-party sellers or forums for troubleshooting.

3. **Potential for Clogging** Carburetors are prone to clogging over time due to dirt, debris, or varnish buildup from old fuel. The MT93A is no exception, and if the engine has been sitting unused for years, the carburetor may require thorough cleaning before it functions optimally.

4. **Fuel Quality Issues** Older carburetors like the MT93A are sensitive to modern fuel additives or ethanol blends, which can cause gumming or corrosion. If your fuel is old or contains high ethanol content, it may accelerate wear or clogging.

5. **Learning Curve for Installation** While the MT93A is straightforward to install, inexperienced DIYers might struggle with tasks like aligning the carburetor, adjusting the float level, or ensuring a proper seal. Improper installation can lead to leaks, poor performance, or even damage to the engine.

6. **Limited Customization** Unlike modern carburetors, the MT93A has limited tunability. Adjustments are mostly limited to basic float level and jet swaps, which may not be sufficient for significant performance gains or modifications.

7. **Risk of Counterfeit Parts** Due to the age of the MT93A, there is a risk of purchasing counterfeit or replica carburetors that may not meet the original specifications. Always buy from reputable sellers to avoid receiving a poorly made or incompatible unit.

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The Tillotson MT93A carburetor is a solid choice for restoring or maintaining a Sears Clinton 3.5HP engine, particularly if you prioritize compatibility, reliability, and ease of maintenance. Its proven performance and availability of parts make it a practical option for those working on vintage equipment. However, potential buyers should be aware of the risks associated with age, fuel sensitivity, and the need for careful installation and maintenance.

If your engine is running poorly due to a carburetor issue and you have access to a genuine MT93A, replacing it is likely a cost-effective solution. That said, if you are unsure about your mechanical skills or the condition of the carburetor, consulting a small engine specialist or mechanic may be wise to avoid further complications.

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- You have a confirmed need to replace a failing carburetor in a Sears Clinton 3.5HP engine.

- You are comfortable with basic carburetor maintenance and cleaning.

- You can source the carburetor from a trusted seller (eBay, small engine repair shops, or Tillotson-authorized dealers).

- You plan to use the engine with fresh, ethanol-free fuel to minimize wear.

- You are unsure about the carburetor s condition or the engine s overall health. In this case, a full engine rebuild or replacement may be more reliable.

- You want modern performance tuning options, as the MT93A lacks advanced adjustability.

- You cannot verify the authenticity of the carburetor, as counterfeit units may cause issues.

For most DIYers working on a vintage Sears Clinton engine, the MT93A is a worthwhile investment provided you approach the installation and maintenance with care. If budget allows, pairing it with a fuel system flush and fresh fuel will maximize its lifespan and performance.

Details:

Sears Clinton 3.5HP Tillotson carburetor MT93A, removed from, Simpson 3.5HP, model # 582-60900.

part #: mt93a prices

• $39.95-$49.99

specifications ouboaen:

• brand: Tillotson
• mpn: Mt93a
• part type: 5hp Carburetor
• country of origin: Japan

returns ouboaen:

• policy: No Returns

seller ouboaen:

• city: Eau Claire, Wisconsin
• # reviews: 847
• rating: 99.2%

general ouboaen:

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

payments ouboaen:

• other
• credit card: Mastercard
• wallet: Google-pay

shipping ouboaen:

• carrier: USPS
• transit: 2-6 Days
• type: Calculated
• cost: $0.00
• class: Standard
• service: USPS Ground Advantage

offer ouboaen:

• options: Ship-to-home
• started: March 25, 2026
• sold: 0
• availability: In Stock
• quantity: 1

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