Quote:
Originally Posted by Geoff Dowdle
Graham ,
The details of the NGK Plugs given by Dave Dale are the wrong way around .
The C6HSA is suitable for Touring engines and hotter than
C7HSA which is suitable for Sports engines and are a colder plug.
How have you checked that the mixture is correct??
With old original Solex carbs , often the float level is too high which can flood the idle circuit and foul the plugs.
Many Electronic ignition systems only take the place of the points and condensor .
A points distributor in excellent condition should not cause any problems .
Many ignition problems with Lucas distributors are in the bob weight system that advances the ignition when the engine speed increases .
If you have previously needed to fit C5HSA (Hot) plugs to your engine , I'd imagine there is some other problem which is causing the fouling.
Geoff
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Geoff, you are correct. I got it the wrong way around. Apologies to all ( absolutely nothing to do with me getting old, of course! ). The hotter C6HSA are recommended for the touring engines. There is an interesting article on the subject of engine damage, pre-ignition, sparking plugs etc. in the BOC Bulletin no. 129 ( Summer 2004 ) by Spencer Lane Jones.