I ahve a Craftsman Briggs and Stratton Mower , the mower was given me a hard time starting , I changed the spark plug and she started , but I was having a lot of white smoke coming out of the muffler and a little out of the air filter , I replaced the air filter and changed the oil , the oil was very very black , I started it up , it gives me a hard time starting , I really have to pull it hard , when it started I still have a lot of white smoke coming out of the muffler and now I have some oil coming out of the air filter , I think I my have put a little to much oil in it , it ran for about 5 minutes and then shut off ,I checked the oil , and from the dip stick it looks like I put about a 1/4 of an inch too much of oil , how do I get some out?? and any ideas on why it is smoking soooo much ??? please reply asap , Thanks