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Sounds like poor coal..... has someone been relieving themselves on it?Blowers are only for starting a fire, once they are going then the chimney should produce enough draw.Jo
How small have you broken your coal up into? Smaller bits = greater surface area = easier (quicker) burning.You would be surprised how smaller a lump you will need to be using on a boiler that size. Jo
JB have you tried to buy paraffin in a normal hardware store? Meths is always available, BBQ lighter fuel is also ok.