Missing at slow speed

[Hal380]

Ok problem solved - and no wise cracks please.

Decided to pull a plug to see if there were any evidence of fouling. I then noticed that not all of the plug caps were as deeply seated on the plugs as others. As I pushed on all the plug caps - 2 "snapped" on further. I am not as mechanically inept as this makes me sound, but it is what happened. Now the moter purrs as low idle and is smooth at low speed. The only reason I am embarrashing myself like this is as a courtesy to those who replied and tried to help.

Regards and thanks

Hal