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1937 Ruby spark plug colour ?
#14
On the original subject...….

This is the colour I have on the Chummy, running a 1" SU. It's also the only Austin Seven I have had in over forty years that will do a genuine 40+ MPG!


   


I think the outside of the plug runs cooler than the electrodes, hence the black. However, the tan is pleasing to see.
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Messages In This Thread
1937 Ruby spark plug colour ? - by Joe eck - 20-10-2019, 07:14 PM
RE: 1937 Ruby spark plug colour ? - by Joe eck - 21-10-2019, 03:07 PM
RE: 1937 Ruby spark plug colour ? - by Joe eck - 21-10-2019, 06:28 PM
RE: 1937 Ruby spark plug colour ? - by Joe eck - 21-10-2019, 07:06 PM
RE: 1937 Ruby spark plug colour ? - by Joe eck - 22-10-2019, 05:27 PM
RE: 1937 Ruby spark plug colour ? - by Joe eck - 23-10-2019, 06:18 PM
RE: 1937 Ruby spark plug colour ? - by Parazine - 23-10-2019, 08:50 PM
RE: 1937 Ruby spark plug colour ? - by Joe eck - 24-10-2019, 06:27 PM
RE: 1937 Ruby spark plug colour ? - by Joe eck - 24-10-2019, 07:09 PM
RE: 1937 Ruby spark plug colour ? - by Joe eck - 25-10-2019, 07:03 PM
RE: 1937 Ruby spark plug colour ? - by Joe eck - 26-10-2019, 05:17 PM
RE: 1937 Ruby spark plug colour ? - by Joe eck - 03-11-2019, 07:09 PM
RE: 1937 Ruby spark plug colour ? - by AustinWood - 04-11-2019, 12:55 PM
RE: 1937 Ruby spark plug colour ? - by Joe eck - 04-11-2019, 07:34 PM

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