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Aug 21, 2016 9:43 am
Aug 21, 2016 9:43 am
Subject: Re: Suitable Spark Plugs for 16/80?
Searching for something else, I just came across a page I copied from one of my brother's Alvis club magazines, giving a comparison of suitable plugs available in the 1990s. This states "Worn engines will require a plug one stage warmer to burn the oil off the electrodes."
Cold to hot for then available 18mm NGK plugs is:
A8 - A7 - - - AB6 - AB2. So that indicates your choice would be AB2. If you wanted to try a plug between AB6 and AB2, your only choice is the Champion D21.
Hope this helps. But don't overlook that that oil indicates that something is getting worn and will need attention in the future. Changing the plugs might eradicate the symptom, but it won't be a cure!
Laurence
Searching for something else, I just came across a page I copied from one of my brother's Alvis club magazines, giving a comparison of suitable plugs available in the 1990s. This states "Worn engines will require a plug one stage warmer to burn the oil off the electrodes."
Cold to hot for then available 18mm NGK plugs is:
A8 - A7 - - - AB6 - AB2. So that indicates your choice would be AB2. If you wanted to try a plug between AB6 and AB2, your only choice is the Champion D21.
Hope this helps. But don't overlook that that oil indicates that something is getting worn and will need attention in the future. Changing the plugs might eradicate the symptom, but it won't be a cure!
Laurence