Tecumseh replacement carburetor

Types of Tecumseh Replacement Carburetor

Tecumseh is a well-known manufacturer of small engines and carburetors used in outdoor power equipment like lawnmowers, snow throwers, and garden tillers. The carburetor is a vital component of the engine, as it mixes air and fuel in the right proportions for combustion. Over time, these carburetors may wear out or get damaged, necessitating the need for a Tecumseh replacement carburetor. There are different types of Tecumseh carburetors, which are as follows:

• Float Carburetor

  These are the most common types of carburetors used in small engines. They use a floating ball in the fuel chamber to maintain a constant fuel level. The float rises and falls with the fuel level, opening and closing the needle valve to regulate fuel supply from the gas tank. Float carburetors are simple and reliable, making them popular for Tecumseh engines.

• Diaphragm Carburetor

  Instead of a float, these carburetors use a diaphragm to regulate the fuel supply. The diaphragm responds to changes in air pressure caused by the engine's intake manifold. As the engine draws in air, the diaphragm pulses and activates a fuel metering valve. This valve doses fuel from the fuel chamber into the airstream. Diaphragm carburetors offer better fuel metering and atomization, especially in variable-speed engines.

• Walbro Carburetor

  Walbro is a popular aftermarket brand that manufactures carburetors compatible with Tecumseh engines. Tecumseh originally used Walbro carburetors in some of their engine models. Walbro carburetors are known for their precision engineering and performance. When selecting a Walbro carburetor for a Tecumseh engine, it's essential to choose one that matches the engine's specifications, such as displacement and power rating.

• Husqvarna Carburetor

  Another aftermarket option is the Husqvarna carburetor. Like Walbro, Husqvarna carburetors are designed for small engines used in outdoor power equipment. However, it's crucial to select a carburetor that matches the Tecumseh engine's performance parameters. Using an incompatible carburetor can lead to starting difficulties, poor acceleration, or engine damage.

• Primer Bulb Carburetor

  These carburetors include a primer bulb that manually pumps fuel into the intake manifold. Users must press the primer bulb a few times before starting the engine to provide the necessary fuel charge. Primer bulb carburetors are handy in cold weather starting or when the engine sits idle for extended periods.

Specifications and Maintenance of Tecumseh Replacement Carburetor

Before purchasing a Tecumseh carburetor replacement, it's important to check the specifications to ensure it fits the intended use. Here are some of the standard specifications found in a Tecumseh replacement carburetor.

• Airflow Capacity

  The airflow capacity refers to the volume of air flowing through the carburetor. It ensures the engine gets the right amount of airflow to optimize fuel combustion. Carburetors with higher airflow capacities are ideal for engines with improved performance.

• Cylinder Displacement

  Cylinder displacement refers to the total volume of air and fuel the engine cylinders can hold. Carburetors are designed for engines with specific cylinder displacements. For instance, a Tecumseh carburetor with a 30mm bore diameter is suitable for engines with a cylinder displacement of 20-25cc.

• Throttle Bore Diameter

  The throttle bore diameter determines the carburetor's airflow capacity and the engine's power output. A larger throttle bore diameter allows more air to flow, increasing engine power. However, it may reduce fuel efficiency and engine performance at lower speeds.

• Jet Size

  The jet size controls the amount of fuel flowing into the carburetor. Larger jet sizes allow more fuel to flow into the engine, resulting in a rich fuel mixture. Conversely, smaller jet sizes lead to a lean fuel mixture. Tecumseh replacement carburetors have jet sizes ranging from 0.50-0.80mm.

• Fuel Type

  Most Tecumseh carburetors are designed to use gasoline as fuel. However, some models can utilize alternative fuel, such as propane. Propane carburetors have different specifications, such as jet size and airflow capacity, tailored for efficient combustion of alternative fuel.

• Choke Type

  Choke controls the air-fuel mixture during the starting process. It ensures the engine starts smoothly, especially in cold conditions. Tecumseh carburetors use two main types of chokes: manual and automatic. Manual chokes require user intervention to set the choke, while automatic chokes use temperature sensors to adjust the choke automatically.

• Float Height

  The float height determines the fuel level in the carburetor and influences fuel delivery to the engine. Tecumseh replacement carburetors have a float height specification of 16-20mm. The float height should be adjusted according to the manufacturer's specifications for optimal engine performance.

• Material

  Tecumseh replacement carburetors are made from different materials, such as aluminum and zinc. Aluminum carburetors are lightweight, corrosion-resistant, and offer improved throttle response. Zinc carburetors are more durable and can withstand high temperatures, making them suitable for heavy-duty applications.

Here are some useful tips for maintaining a Tecumseh carburetor and ensuring optimal engine performance.

• 1. Clean the carburetor regularly: Over time, dirt, dust, and debris accumulate in the carburetor, blocking the airflow and fuel pathways. Use a soft brush and carburetor cleaner to remove the dirt particles. This ensures smooth airflow and fuel delivery to the engine.
• 2. Inspect and replace the air filter: A dirty air filter restricts airflow into the carburetor, affecting engine performance. Check the air filter regularly and replace it after 20 hours of use. Consider operating in a clean environment to prolong the life of the air filter.
• 3. Use fresh fuel: Tecumseh replacement carburetors are designed to use gasoline as fuel. However, avoid using fuel with high ethanol content as it can damage the carburetor over time. Also, do not use fuel that has surpassed the manufacturer's recommended storage period as it may cause starting problems.
• 4. Check fuel lines and connections: Inspect the fuel lines and connections to ensure there are no leaks or blockages. Damaged fuel lines may restrict fuel delivery to the carburetor, affecting engine performance. Replace damaged fuel lines and ensure all connections are secure to prevent fuel leaks.
• 5. Adjust carburetor settings: With time, the carburetor settings may become out of adjustment. Use a tachometer to measure the engine speed and adjust the idle speed and mixture screws accordingly. Proper carburetor settings ensure optimal engine performance and fuel efficiency.
• 6. Store the engine properly: If not in use for a long time, store the engine in a clean, dry environment away from direct sunlight. Drain the fuel tank and clean the carburetor before storing.

How to choose Tecumseh replacement carburetor

When choosing a Tecumseh carburetor replacement, there are several factors to consider to ensure that it fits and works well with the engine. These include:

• Model number: The first step in selecting the right carburetor for Tecumseh engines is to determine the engine model number. This can be done by looking at the carburetor's service manual or the engine's metallic nameplate. Once the model number is obtained, it should be referenced in the service manual to find the carburetor part number.
• Carburetor part number: After obtaining the engine model number, the next step is to find the carburetor part number. This can be done by looking at the service manual or contacting a Tecumseh engine dealer. Once the carburetor part number is obtained, it should be used to order a replacement carburetor from a local dealer or an online store.
• Carburetor specifications: When selecting a Tecumseh carburetor, it is important to consider its specifications. This includes the size of the carburetor, the type of fuel it uses, and the emission standards it meets. By considering these specifications, buyers can be sure to get a carburetor that is compatible with their engine and meets the required performance standards.
• Quality: It's crucial to consider the replacement carburetor's quality. While it might be less expensive, a carburetor with lower quality could cause more issues than it solves. Aim for a replacement carburetor that is high-quality and dependable, even if it costs a little more.

How to DIY and Replace Tecumseh Replacement Carburetor

To replace a carburetor on a Tecumseh engine, follow these steps:

• Safety Precautions:

  Before working on the engine, ensure it is cool. Disconnect the spark plug wire to prevent accidental starting. Work in a well-ventilated area away from open flames or sparks, as gasoline is highly flammable.

• Gather Tools and Parts:

  New Tecumseh carburetor (matching the old one in type and size) Screwdrivers (flathead and Phillips) Socket or wrench set Pliers Carburetor gasket (new) Fuel line cutter (if equipped with clamps) Torque wrench (if required) Clean rags or paper towels)

• Remove the Air Filter and Housing:

  Take out the screws or bolts holding the air filter and housing. Remove the air filter and set them aside. This will give better access to the carburetor.

• Drain Fuel from the Carburetor:

  Use a container to catch it and loosen the fuel from the carburetor. Let it drip into the container. Be careful not to touch the hot engine parts.

• Disconnect the Fuel Lines:

  Use pliers or a fuel line cutter to remove the fuel lines from the carburetor. Note how they were attached for reinstallation.

• Disconnect the Governor Linkage:

  Take out the linkage connected to the carburetor. Remember where it goes for reinstallation.

• Remove the Carburetor:

  Loosen the bolts or nuts holding the carburetor to the engine. Carefully pull the carburetor away from the engine, being careful not to drop anything into the intake port.

• Clean the Area:

  Use a clean rag or paper towel to wipe the area where the new carburetor will go. This keeps dirt out of the engine.

• Install the New Carburetor:

  Put the gasket on the new carburetor. Line the carburetor up with the bolts or nuts on the engine. Tighten them gently to hold it in place.

• Reconnect Governor Linkage:

  Attach the linkage to the carburetor the same way it was on the old one.

• Reconnect Fuel Lines:

  Put the fuel lines on the new carburetor the same way they were on the old one. Use the pliers or fuel line cutter if there are clamps.

• Reinstall the Air Filter and Housing:

  Put the air filter and housing back where they were. Tighten the screws or bolts to hold them in place.

• Reconnect the Spark Plug Wire:

  Plug the wire back into the spark plug.

• Check for Fuel Leaks:

  Before starting the engine, look at the fuel lines and carburetor for any leaks. If there are any, tighten the connections or redo the lines.

• Start the Engine:

  Pull the recoil starter or turn the key to start the engine. It may take a few tries since the carburetor needs to get gas.

• Adjust the Carburetor (if necessary):

  If the new carburetor has adjustable settings, follow the instructions to get them right.

Q and A

Q1. Are Tecumseh carburetors any good?

A1. Tecumseh carburetors are good. They are reliable and serve their purpose well. However, like any other carburetor, they will need proper maintenance to function well and give users a seamless experience.

Q2. What is the warranty period for Tecumseh replacement carburetors?

A2. The warranty period for Tecumseh replacement carburetors varies depending on the supplier and manufacturer. However, most replacement carburetors have a three to six months warranty period.

Q3. How long does a Tecumseh carburetor last?

A3. A Tecumseh carburetor can last up to five years or more. However, its lifespan greatly depends on several factors, including the level of maintenance, usage, and environmental conditions.

Q4. Can users perform maintenance on Tecumseh carburetors by itself?

A4. Yes, users can perform maintenance on Tecumseh carburetors by themselves. The maintenance process is pretty simple and easy. Just ensure to follow the steps and instructions provided above for cleaning and maintaining a Tecumseh carburetor.