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Gunson Colortune G4074 14mm Classic Engine Petrol Diagnostic Saver Tune-Up Plug

SKU: G4074

£83.00 GBP
£83.00 GBP
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Brand new Gunson Colortune 14mm thread diagnostic / tuning kit. Ideal for tuning classic cars. 

This colortune kit is a spark plug with a glass window that lets you watch combustion. Flame colour shows the air–fuel ratio: yellow = rich, blue-white = weak, and Bunsen blue = correct. Turn the mixture screw until you get Bunsen blue to set the engine for best economy and performance.

Kit includes:

  • 14mm short reach plug 
  • Hexagonal adaptor
  • Angled cleaning brush
  • Crush washer
  • Full instructions

See my store for adapter to use this kit on other spark plug sizes.

See my store for other classic Car and Motorcycle tools. 

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Product Details

Brand Gunson
Colour Black
Vehicle type Car, Motorcycle
Item includes 14mm Colortune Kit
OEM part numbers G4074
Placement on vehicle Engine
Right or Left Hand Drive Both
System of measurement Metric
Thread 14mm x 1.25
Type Mixture Tester Kit