Gunson Colortune See Through Spark Plug Kit.
The Tune-up plug for Petrol or LPG, 2 and 4 stroke engines with single, twin or multiple carburettors or fuel injection systems.
The original and best tool for seeing what's happening inside the combustion chamber of the petrol engine.
It allows you to see the combustion and to adjust the mixture by color.
Fits most petrol engines in standard form with additional adapters available for vehicles with alternative sized spark plugs.
The kit includes:
- See-Through Spark Plug
- Hexagonal adapter for spark plug wrench
- Copper sealing washer
- Extension Cord
- Extension tube with mirror
- Cleaning brush
- Instructions in English
The instruction manual can also be downloaded HERE.
Additionally, an analysis chart can be downloaded HERE.
Depending on thread size, Colortune will fit most vehicles.
Available in the following basic thread sizes:
- 10 mm - Gunson Article Number G4172 - Currently NOT in Stock!
- 12 mm - Gunson Article Number G4171 - Currently NOT in Stock!
- 14 mm - Gunson Article Number G4074
If you are unsure about the actual sparkplug thread of your vehicle, this page can be of help:
Please scroll down that page to "Find your Spark Plug" and fill in the required date.
Then select a spark plug by clicking on its name and under the header of Specifics you will find the Thread Diameter (MM), 14 mm in case of this example.