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08-20-2008, 08:18 PM
This engine was rebuilt with some performance mods made such as a mid range cam, roller rockers etc. I was told when I rebuilt it that the computer would not have to be re flashed. It has 20 hours on it now and there is an odour from the engine that smells like burning paint and the exhaust leaves a black carbon residue on the transom. This has been evident since the rebuild. There have been no problems with performance or oil consumption. I am assuming that it is running rich. Any suggestions?