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.