Morning all

Checked the coil, cleaned magnets etc and re gapped, decided to check the plug again, plug not sparking when earthed externally but has been fine before, tried it on the lead of another mower and spark is fine, tried it on the Honda again, nothing, good call AVB. Found another long reach plug, put that in and she fired up but blowing loads of blue smoke, changed the oil and let it run for a while but still smoky, runs great at revs but at low speed backfires through the exhaust with flame as well.

Cheers
wce