Re: 1988 johnson v6 vro info
I got your pictures of the engine on the stand you made. Looks good!
I found some info in my notes that might help ID whether that is a 1986 or 1987.
The 1986 carbs had a larger bore than the 1987. That caused a problem on some engines that sat low in the water causing higher exhaust back pressure. The solution was to change the carbs to 1987 carbs with a smaller bore diameter. The 1987 carb P/N was 398393, ID1537.
The main jet and idle air bleed orifices on the '86 were : main jet 65D, intermediate air bleed orifice 14M, low speed orifice 20M
The main jet and idle air bleed orifices on the '87 were : main jet 62D, intermediate air bleed orifice 14M, low speed orifice 48M
You can thank Clanton for that info.
With the air silencer removed, you should be able to to read the numbers stamped on the air bleed orifices. They are the two small brass fittings with a hole in the center. that screw into the face of the carb. You have to remove the large brass screw on the carb bowl to see the main jet.