Spark plugs

Hey folks, Landy series 3 2 3/4 petrol. Runs well and have no issues whatsoever with it driving etc.

My question is the spark plugs. I do use lead replacement additive but to be honest after replacing the head gasket the valves looked really good so will not bother in future.

However, I’ve noticed the plugs have a white substance on them like limescale. It runs well (slightly rich). It maybe nothing and I’ll leave alone but would rather ask ‘just in case’.

Thank you

Rich

You may think that your engine is running rich but white deposits are the result of running lean.
If it were running rich they would have black deposits on the plugs.
A nice light brown is what there should be on the electrodes.
A Gunson colortune is a simple to use tool to set up older carb fed engines.

Thanks Tottot that’s what I’m thinking. Defo looks l like it’s running lean.

Going to turn the mixture up slightly to helpfully get the plugs a nice brown for now

Gun7354 said:

Thanks Tottot that’s what I’m thinking. Defo looks l like it’s running lean.

Going to turn the mixture up slightly to helpfully get the plugs a nice brown for now

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Used to be 1 & 1/2 turns for standard running