Just had my 873 starting to blow black smoke and run away yesterday. By the time I got the air supply choked it seemed like it was starting too die. Checked the oil level and it is way over full. Still turns over but I haven't tried more than a couple seconds, it sounds odd. Turbo has maybe 30 hrs on it along with head gaskets and belt. Other than correcting oil level what should be my next step? Thanks for any help. 2002 with deutz