ok now i havent come across this before but i purchaced 2 old rover rideons the old tiller style and i did a service on both engines now neither had been started for prob 16 months or more so i pulled the plugs and sprayed in the plughole with wd then pulled them over slowly.i then put plug back in and some fresh fuel and a spray of the old aerostart and away they went.stoped them and my son left the fuel tap on one and in the morning when we did an oil change one was good but black and the other had a sump full of fuel.what would cause this?? i know both carbys need an overhaul and are the kits available and roughly how much.. any help apreciated guys regards mike
