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The colour of plugs when you take them out.

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The colour of plugs when you take them out.
Nick Turley Offline
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Joined: Aug 2017 Posts: 497 Threads: 13
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#12
11-07-2018, 01:18 PM
(10-07-2018, 07:16 PM)Graham Honnor Wrote: Hello Dave
As you are probably aware, the lower the number, the hotter the plug so I am in the same mind of thinking that the "4 "
may be a little too hot.
I was led to believe that the B6HS was the correct plug for our type of head but with mine, I found that they oiled up quite quickly. The change to a B5HS stopped that problem immediately for me but I will certainly try a BP5HS next time as Ian suggests as I have a lot of respect for his knowledge of these things.
I also always buy mine on Ebay and usually pay around the £6 mark with delivery included.
Hope this helps a little.
Graham.
The BP5HS is definitely the one to go for for a normal Austin seven.
For those with 18mmm plugs I have found that the D21  is a good bet especially with mag cars.
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RE: The colour of plugs when you take them out. - by Nick Turley - 11-07-2018, 01:18 PM

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