Those models did not use the 0203984 gasket on he high speed nozzle like the smaller motors. It was thought that the amount of fuel leaking around the needle valve could be fixed by screwing in the high speed needle valve a bit. Of course this gasket is absolutely essential on fixed jet carburetors. Many add it to these higher horse power motors to make the high speed adjustment more responsive.Another problem of which you are probably aware is the floats where sealed with shellac. The alcohol in todays fuels dissolves this and allows the cork to absorb fuel. This has the effect of raising the fuel level in the float bowl causing the outboard to run rich. If I find a good float in this condition I set it out in the Florida sun which soon bakes out the fuel and then seal it with a light coat of Super Glue. A less han perfect float is best replaced. . .
