# Buy Gunson Colortune 14mm spark plug tester at Autoservice ## Gunson Colortune spark plug tester 14mm for optimal engine tuning Brands / GUNSON With the Gunson Colortune 14mm spark plug tester, you can easily adjust the air-fuel mixture of your petrol engine for optimal performance. ## Prices and stock - **GUN 4074**: € 93,95 incl. VAT — 19 in stock ## Order URL [Gunson Colortune spark plug tester 14mm for optimal engine tuning](https://www.auto-service.be/en/tools/special-for-automotive/categorie-spark-plugs/gunson-colortune-spark-plug-tester-14mm-gunson-g4074) ## Alternate URLs - **nl**: [Gunson Colortune spark plug tester 14mm for optimal engine tuning](https://www.auto-service.be/nl/merken/gunson/gunson-colortune-bougie-tester-14mm-gunson-g4074) - **fr**: [Gunson Colortune spark plug tester 14mm for optimal engine tuning](https://www.auto-service.be/fr/marques/gunson/gunson-colortune-testeur-de-bougies-dallumage-14mm-gunson-g4074) - **en**: [Gunson Colortune spark plug tester 14mm for optimal engine tuning](https://www.auto-service.be/en/brands/gunson/gunson-colortune-spark-plug-tester-14mm-gunson-g4074) ## Images - ![Product image](https://www.auto-service.be/assets/media/27534/conversions/gunson-colortune-bougie-tester-14mm-gunson-g4074-optimized.jpg) - ![Product image](https://www.auto-service.be/assets/media/27535/conversions/gunson-colortune-bougie-tester-14mm-gunson-g4074-optimized.jpg) - ![Product image](https://www.auto-service.be/assets/media/27536/conversions/gunson-colortune-bougie-tester-14mm-gunson-g4074-optimized.jpg) ## Specifications - **Reference**: GUN 4074 - **EAN**: 5018341740740 - **Brand**: GUNSON ## Product description ### Precision instrument for engine tuning The Gunson Colortune 14mm spark plug tester is an indispensable tool for accurately adjusting the air-fuel mixture in petrol engines. By directly observing the combustion flame, you can optimize the mixture ratio for better performance and fuel efficiency. ### Simple operation with visual feedback This spark plug tester temporarily replaces your standard spark plug and features a glass viewing window. This allows you to see the color of the combustion flame in the cylinder: - **Yellow flame** : mixture too rich - **Blue-white flame** : mixture too lean - **Bunsen blue flame** : optimal mixture By adjusting the mixture screw until the flame has the correct color, you can tune the engine precisely. ### Suitable for various engines The Colortune is designed for use with 14mm spark plugs and fits most petrol engines. For engines with different spark plug sizes, optional adapters are available: - 10mm: G4055A - 12mm: G4055B - 14mm long reach: G4055D - 14mm tapered seat: G4055C - 18mm: G4055E ### Complete and user-friendly The kit contains everything you need for successful tuning: - 14mm Colortune spark plug - Hex adapter - Extension lead - Viewing tube with adjustable mirror - Cleaning brush - English instructions ### Advantages of the Gunson Colortune - **Direct visual control** : observe combustion in real-time - **Precise tuning** : optimize the air-fuel mixture for better performance - **Fuel saving** : a correctly tuned engine uses less fuel - **Easy to use** : clear instructions and complete set for smooth tuning ### Applications The Gunson Colortune is ideal for both 2- and 4-stroke petrol engines, with single, double or multiple carburetors or fuel injection systems. Whether you have a classic car, motorcycle or modern car, this spark plug tester helps you tune the engine optimally. ### Technical specifications - **Spark plug size** : 14mm short reach - **Compatibility** : suitable for most petrol engines - **Dimensions** : 115mm x 165mm x 30mm - **Weight** : 150g With the Gunson Colortune 14mm spark plug tester, you have a reliable and effective tool to improve your engine performance and optimize fuel consumption. ## Breadcrumbs - [Brands](https://www.auto-service.be/en/brands) - [GUNSON](https://www.auto-service.be/en/brands/gunson) ## Related products - [CUSTOR 3/8" spark plug socket set 10-piece with rubber holder](https://www.auto-service.be/en/tools/special-for-automotive/categorie-spark-plugs/custor-38-10mm-spark-plug-socket-set-10-piece) - [FACOM 3/8" spark plug socket 16 mm long with rubber holder](https://www.auto-service.be/en/tools/special-for-automotive/categorie-spark-plugs/facom-38-10mm-spark-plug-cap-16mm-long) - [LASER 3/8" spark plug socket with universal joint 14mm for BMW](https://www.auto-service.be/en/tools/special-for-automotive/categorie-spark-plugs/laser-38-10mm-spark-plug-cap-with-knee-joint-14mm) - 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