hi,I thought I would get the barford out and get it going after its winter rest ready for the allotment but the villiers mk 15 hs is suffering from a poor and intermittant spark.I,ve cleaned the points and cleaned the inside of the flywheel and derusted the coil wings and the flywheel but after turning it over with a battery drill (which is pretty fast) I am only getting a weak spark every now and again,any thoughts or advice would be appreciated.