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

SKU: G4074

£90.54 GBP
£90.54 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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