How to troubleshoot Tecumseh HM80 Engine

Once you have identified the problem with the Tecumseh HM80 engine, you can proceed further with the fixing process. Take all the necessary safety precautions. A well lit up workplace is the foremost requirement. A pair of gloves and safety glasses should not be neglected. Tools like ruler, screw driver and carburetor cleaner will come in handy for the task.

Follow the specifications table to understand the machine. Look out for the correct engine model and the respective Carburetor Parts. You can find out the engine number and the carburetor model using our manual.  The diagram of every carburetor model has been listed on the Tecumseh Carburetor Guide.

Here you can find the correct carburetor model and carry out adjustments to it for performance improvements. We have provided information on every tecumseh carb identification till date.

Internal combustion engines need regular attention to be able to function properly. Poor maintenance and faulty engine parts can lead to complete breakdown. To avoid this situation, you need to understand the engine first. The power, the operation limits and operation area. The environment needs to be clean, free from dust and other harmful particles that can cause worn out engine parts.

The fuel should also be free from impurities. Fuel resin can cause clogging in carburetor which will hinder the flow of fuel into the engine. We have tried to put up a solution manual for you to fulfill your need to troubleshoot, adjust and understand the various machine parts and with a hope that it would fully serve the purpose, it’s made for.

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Identification and Understanding the problems of Engine’s Carburator

Tecumseh engine brand is quite popular. They’re usually used in push-behind lawn mowers, snow throwers, garden tractors and tillers and they’re sized for that reason. Carburetor servicing ensures correct engine working. There are a lot of reasons that make an engine stop functioning or not function to its full capacity, including fuel impurities or dust particles, clogging of carburetor jets, sluggish throttles and adhesiveness of the choke valves.

Carburetor parts have controlling springs that may wear out over time, which would affect the overall performance.Tuning the carburetor from time to time will avoid its absolute collapse. Before carrying out any sort of tuning, you must be aware of its various components.

Understanding and adjustments of Tecumseh carburetor parts to an engine has been made easier by the Tecumseh carburetor guide. The information provided on the website is useful for carrying out repairs, re-assemble, adjustments, troubleshooting, and to find out whether you require a new spare part for your engine or not.

Our guide has information about every tecumseh parts  that has been manufactured till date. We have tried to provide an elaborative solution manual to cope up with problems that might be faced by Tecumseh engine owners.

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How To Find The Right Tecumseh Carburetor Parts

Tecumseh engines have been used in many power equipments like snow throwers, garden tractors and lawn mowers for many years. If you own a machine that has a Tecumseh engine, then our site will help you to find and get the right carburetor for the engine. Engines wear out due to many reasons. A faulty carburetor can be the culprit sometimes. Once you have identified this problem what needs to be the next step? Here is the answer.

Identifying the required spare part is the first and foremost task to find the right replacement. It might seem to be a daunting task for many. But it’s not. You can easily identify the right model using our information guide.

Search for the correct Spare Parts

A complete list of Tecumseh Carburetors is available on the website. Find the perfect replacement part for your engine. A complete detailed list of carburetors with diagrams is also available for the knowledge freaks and self help trouble-shooters!

Once you are over with the previous task. The next task is to find a new replacement carburetor for your engine. The carburetors are available through local dealers or online stores. All you need is to buy the carburetor from a reliable store. Local dealers offer more reliability than most of the e-stores because they can provide good expert guidance and help in select the most suitable spare parts.

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How to Tecumseh carburetor identification

How to Tecumseh carburetor identification.

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How to Tecumseh carburetor identification

A carburetor is a lifeline of every engine. It can be a small engine or a big engine as it regulates the fuel and air flow to the engine. You must keep this thing in your mind that uneven flow can lead to several problems like:

  • Poor fuel economy
  • Sluggish performance
  • Engine backfires
  • Engine overheating

Periodic maintenance and timely repair are needed for proper functioning of the machine. Tecumseh Carburetors can wear out due to many reasons.

  • If the engine is staggering, getting stopped and letting out black smoke, or has a difficult time starting you may need to rebuild the carburetor. Though it looks difficult, but rebuilding is an easy task that can be completed in just a few simple steps

Tecumseh is a well known brand in the small gasoline engine market for many years. They come with a huge range of carburetors. Most of them are made by Tecumseh itself. Some other brands of carburetors that are popular are:

  • Carter
  • Marvel-Schebler
  • Dellorto
  • Zenith
  • Tillotson

Why is it necessary to correctly identify the carburetor?

  • The need to identify a carburetor model arises when you need to carry out repairs and adjustments. The correct model must be known to you so that you get all the necessary information and select the best alternative.
  • The model belonging to every series is listed on the Tecumseh carburetor guide web site. Series 1-11 carburetors, Diaphragm Carburetors, and other non Tecumseh models are shown along with their pictorial representations.
  • Tecumseh carburetors are marked with model number and a respective date code. You can get an easy reference from the parts lookup table given on the website and find the right model. A complete list is available on the website which would also help in case of a non-Tecumseh variant of the engine.

The diagrams show an expanded view which would help in dismantling the carburetor. Every part has been numbered with its name to make it simpler. This will enable you to identify the lower level assembly components of the different models help to carry out fixes. The service kit number for every variant has also been mentioned.


  • Our manual will help you right from the start. From identifying the carburetor model, engine number, carrying out repairs and improvements and troubleshooting.
  • We have tried our best to collect every piece of information related to these carburetors and present it to you in the best possible manner.
  • You will not find a more detailed, simplified and a subject specific information guide anywhere else.
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Some important Do’s and Don’t’s to follow while troubleshooting Tecumseh carburetor

As the breeze is becoming cold it is a clear indication that winters are approaching fast. It means that it is now time to repair and troubleshoot your snow blowers and garden mowing equipment. You may have to clear those huge chunks of ice or clear your garden from excessive grass and leaves. All such machines have a one thing in common and that is called as a Tecumseh Carburetor. Here are some important do’s and dont’s that can be followed while repairing the carburetor.

Important Do’s to be followed

One of the most important things to follow is to make sure that only genuine and original Tecumseh service parts are used.

Before starting with the troubleshooting procedure such as cleaning of the carburetor with appropriate cleaner, you should always remove the o-rings, main nozzles and Welch plugs.

Important Dont’s to be followed

Never clean the blocked passages with drill bits, instead use fine copper wire. Drill bits can lead to enlarge passages and can cause serious technical problems.

The carburetor should not be soaked with cleaner for a longer period of time as it can lead to soap deposit and it may reduce the performance of the device.

The bowl nuts should not be interchanged and never reuse the O rings and gaskets.

Some important troubleshooting steps

Replace the old fuel with fresh fuel and if possible you can also add few amounts of fuel stabilizers for better performance.

The fuel restrictions into the carburetor should be immediately addressed. You should also make sure that the carburetor is properly checked and cleaned.

Tecumseh carburetor Parts requires a proper fuel and valve adjustments. Make sure that the user manual is properly consulted so that appropriate adjustments can be done.

The spark plug is one of the most important parts of small engines and hence check this device for proper gap, condition and reach. If all these conditions are not fulfilled, then make sure necessary troubleshooting steps are performed on immediate basis.

Though these are very simple steps, but by following these small and easy steps, you can easily achieve excellent performance out of the engine. In order to know more about the Tecumseh small engines and their parts, you can also log on to this online repair guide called as It is completely free and there is a vast amount of knowledge that is available.

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Functioning of the Tecumseh carburetor series 7

Tecumseh is one of the most trusted brands that have manufactured different series of carburetors for engines. Each of the series has its own distinct features. Here we are going to explain about different parts of Tecumseh carburetor series 7. This helps you to understand about the working of the series 7 carburetors.

Main nozzle and emulsion tube

The main flow of fuel come with the3 main jet and rises up in the emulsion tube, where the main air enter through the holes that are set along the side of an emulsion tube and discharged into the intake air stream via the main nozzle that extends into the Venturi. A o-ring is used at the bottom of the emulsion tube and a spring pushes it up against the bowl gasket.

Alignment holes and air paths

Alignment holes in the crab body and gasket is attached to the bowl from one side. The main nozzle goes through the center hole up in the Venturi. Fuel enters through the idle jet air travel down through the air bleed to the emulsion tube. The bowl has two holes.

Idle fuel discharge holes

In the low speed operation, the fuel from the idle jet and air from the air bleed mix in the idle fuel mixing well and it discharges into the intake air stream via idle fuel discharge hole. As the throttle opens additional mixture is delivered via progression holes.

Throttle plate

While installing the throttle plate on 2-7 HP carburetor the position the plate is a scribe mark facing out and in the 12 o’clock position.

Main air bleeds and nozzle

Mark the choke plate before removing it so that you can easily reinstall it. After removing the choke you can see the air bleed. The main nozzle extends into the air stream at the Venturi.

The idle speed screw

The idle speed screw helps to close the throttle up to a certain limit.

If you want more information or have any issue regarding different parts of the engines, feel free to visit the website It is one of the most visited websites that provide genuine tecumseh carburetor parts with their manufacturer warranty. A quick reference table is also available on the website that helps to choose the right carburetor for the engine. The website also helps to identify the authentic parts of engines.

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