1. Old Chainsaw Parts Items
  2. sku: 6114040788171721
  3. TILLOTSON OM4A

TILLOTSON OM4A Carburetor Rebuild

Om4a Tillotson Vintage Carburetor - Used For Rebuild

( Brand: Tillotson ), ( Manufacturer Part Number: OM4A ), ( Type: Carburetor )

Review TILLOTSON Vintage Carburetor Used For Rebuild

The Tillotson OM4A carburetor is a high-performance, two-stroke engine carburetor designed for use in various applications, including go-karts, lawn mowers, and other small engines. This carburetor is recognized for its durability, efficiency, and ease of use in rebuild projects.

The OM4A carburetor features a unique venturi design with a large, 14mm main jet opening, which allows for optimal fuel delivery and efficient combustion. It also comes with a range of needle and jet sizes to accommodate various engine configurations and fuel types. The needle jet kit includes sizes from #45 to #110, providing flexibility for tuning and performance adjustments.

The carburetor's float bowl is generously sized, ensuring ample fuel supply to the engine even under heavy loads. The float bowl gasket is made of a high-quality, flexible material, ensuring a tight seal and consistent fuel delivery. The float bowl also comes with a convenient drain plug, making it easy to remove and clean the bowl during the rebuild process.

The OM4A carburetor's idle mixture screw is easily accessible and adjustable, allowing for precise tuning of the engine's idle speed and quality. The carburetor also features adjustable main jet and needle jet screws, which can be fine-tuned for optimal engine performance under various operating conditions.

The body of the carburetor is made of cast aluminum, providing strength and durability while keeping weight to a minimum. The carburetor comes with a gasket kit, including a float bowl gasket, needle jet gasket, and main jet gasket, ensuring a proper seal during the rebuild process.

In summary, the Tillotson OM4A carburetor is a versatile and efficient two-stroke engine carburetor suitable for various applications. Its large venturi design, adjustable jet sizes, and accessible tuning screws make it an excellent choice for those seeking optimal engine performance. The carburetor's durable cast aluminum body and included gasket kit ensure a smooth and successful rebuild process.

Tillotson OM4A carburetors are widely used in small engine applications, particularly for go-karts and lawnmowers. When considering purchasing one for rebuild, it's essential to weigh the pros and cons before making a decision.

Pros:

1. Widely Available: The Tillotson OM4A carburetor is a common part in the small engine community, and replacement parts are readily available. This makes it easier to find and purchase the necessary components for a rebuild.

2. Durable: The Tillotson OM4A carburetor is known for its robustness and ability to withstand the wear and tear of frequent use. Rebuilding it can be a cost-effective alternative to buying a new one.

3. Easy to Rebuild: The design of the Tillotson OM4A carburetor is relatively simple, making it an accessible project for DIY enthusiasts. The rebuild process is well-documented online, and the instructions are straightforward.

Cons:

1. Requires Skills and Tools: Although the rebuild process is straightforward, it does require a certain level of mechanical aptitude and the right tools. For those without the necessary skills or tools, it may be more convenient to purchase a rebuilt or new carburetor.

2. Time-Consuming: Rebuilding a carburetor can be a time-consuming process, especially for those who are not experienced in the process. It may take several hours to complete, depending on the complexity of the project.

3. Cost: The cost of purchasing a Tillotson OM4A carburetor for rebuild depends on several factors, including the condition of the carburetor and the cost of replacement parts. While rebuilding can be a cost-effective alternative to buying a new one, the total cost may still be higher than purchasing a rebuilt or new carburetor.

Conclusion:

The Tillotson OM4A carburetor offers several advantages for those who are comfortable with the rebuild process, including availability of parts, durability, and the sense of accomplishment that comes with a successful project. However, it requires a certain level of mechanical skills and the right tools, and the process can be time-consuming and costly. Ultimately, the decision to purchase a Tillotson OM4A carburetor for rebuild depends on individual circumstances, including budget, availability of tools, and mechanical abilities.

Recommendation:

If you have the necessary skills, tools, and time, rebuilding a Tillotson OM4A carburetor can be a rewarding project that results in a functional and cost-effective component for your small engine application. However, if you lack the necessary skills or tools, or if time is a constraint, it may be more convenient to purchase a rebuilt or new carburetor. Ultimately, the decision depends on your individual circumstances and priorities.

Details:

All parts move as they should. Carburetor is used and appears to be in good condition. No corrosion is visible. Carburetor could be in working condition, but has not been tested, so it is being sold for parts or.

part #: om4a prices

  • $6.00-$36.95

specifications sawpancho:

  • brand: Tillotson
  • mpn: Om4a
  • type: Carburetor

offer sawpancho:

  • sold: 0
  • options: Ship-to-home
  • quantity: 1
  • availability: In Stock
  • started: June 12, 2025

shipping sawpancho:

  • carrier: USPS
  • cost: $14.40
  • type: Calculated
  • transit: 4-9 Days
  • class: Standard
  • service: USPS Ground Advantage

returns sawpancho:

  • time: 30 Days
  • policy: Returns Accepted
  • method: Money back
  • paid by: Seller

general sawpancho:

  • condition: For parts or not working
  • Yard, Garden Outdoor Living > Outdoor Power Equipment > Chainsaw Parts

seller sawpancho:

  • city: Rochester, New Hampshire
  • rating: 99.8%
  • # reviews: 7636

payments sawpancho:

  • other
  • wallet: Google-pay
  • credit card: Diners-club
type: carburetor,
category: home & garden > yard, garden outdoor living > outdoor power equipment > chainsaw parts, sku: 6114040788171721,

Tillotson OM4A Is Similar To:

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3 offers $6.00–$36.95 USD
  • Offer #1: $6.00 price + $16.45 shipping estimate = $22.45* total. Carburetor could be in working condition, but has not been tested, so it is being sold for parts or not working Carburetor is used and appears to be in good condition.+$16.45 shipping
  • Offer #2: $36.95 price + $0.00 shipping estimate = $36.95* total. OM-1B Scott-Atwater Outboard 3665 33 HP 1956 DI-21122. Westbend Chrysler.FREE SHIPPING
  • Offer #3: $36.95 price + $0.00 shipping estimate = $36.95* total. OM-2B Replace by OM-5A Elgin Outboard 59601, 59602, 59611, 59612 25 HP 1956 DI-20124. Sears-Elgin Firestone Oliver Scott-Atwater Westbend.FREE SHIPPING

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