Cleaning out the orifices on my 1990 johnson 140 I found the idle bleed jets are wrong.
http://www.boats.net/parts/search/BRP/JOHNSON/1990/J140TLESE/CARBURETOR%20AND%20LINKAGE/parts.html
This has the idle bleeders as #41 but the ones I have are 36, and the bottom starboard looked more like 39...