Here we go again a new season with the same problem. iHAVE APAIR OF 6.2 MERCS MPI.One engine burns twice as much fuel .50 gals. to 25 gals. has anyone got any solutions to mine problem. 2001 formula p.c.with bravo three out drives. on a cold start engine with problem burns black smoke for a couple of minutes.under way you smell fumes.yard mech says they put a computer on engine and could not find any thing wrong.both engines run smooth . poppy