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TKART magazine True or False | Diaphragm kart carburetors: big truths (and myths!) about carburetion, maintenance and adjustments – Part 3
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DIAPHRAGM KART CARBURETORS: BIG TRUTHS (AND MYTHS!) ABOUT CARBURETION, MAINTENANCE AND ADJUSTMENTS – PART 3

Gianluca Covini
25 January 2026 • 6 min. read

Third episode (of six!) of the "True or False" series of articles dedicated to diaphragm carburetors for karting (did you miss the first? Here it is: "Diaphragm kart carburetors: big truths (and myths!) about carburetion, maintenance and adjustments – Part 2"). Keith McCloughry, product engineer at Tillotson, a leading manufacturer of FIA-approved diaphragm carburetors for Karting and other applications, answers to our questions. The six questions in this episode address the most common doubts about the differences between diaphragm carburettors and float-bowl carburettors (for further reading, see “Tech Talk | The float carburettor”), the other type of carburettor used in karting. Put your knowledge to the test by deciding whether statements such as “It is easier to achieve correct carburation with a diaphragm carburettor than with a float-bowl carburettor”, or “As with a float-bowl carburettor, the operation of a diaphragm carburettor is never affected by the position of the…” are true or false.

Editor's Note
For those who want to delve deeper into the operation of the diaphragm carburetor, the article ""The Diaphragm Carburetor" is available in the "Technical" section of TKART Magazine. This article describes its structure and operating principles. Reading it can be helpful in better understanding the topics covered in this "True or False" series of articles, especially for novice karters.

Editor's Note 2
The answers provided in this series, while sometimes referring to components or solutions developed by the manufacturer Tillotson, are based on technical principles that apply to all diaphragm carburetors, regardless of manufacturer. Anyone who uses this type of carburetor, whether amateur or competitive, will therefore find this guide useful tips for optimizing carburetion, avoiding common mistakes, and better understanding the operation of a fundamental component in karting.

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Unlike float-bowl carburettors, diaphragm carburettors can be installed on a kart at any angle relative to the horizontal plane

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Keith McCloughry

Tillotson product engineer

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