Hi, my grandson was helping me the other day to mow a lawn, I told him to check the oil and top it up if it need it. I then saw smoke coming out of the exhaust when he was using it. I stopped him and checked the oil and it was over full by about a litre, I removed the excess oil and restarted mower, was fine then. Now tho when I startup first time it blows a large cloud of blue smoke, it then clears and it fine untill you stop it and leave it for a few hours and it will blow smoke. If you restart after 10 mins no smoke.
Any idea what it maybe.
Thanks