Expert: tyler boehner - 3/3/2008

Question
I have a 1993 40hp Johnson that would idle good but when you gave it the gas it would go died. So I rebuilt the carburetors and now i can't get it to run at all I can put some gas into the spark plug holes and it will run for a short time what can I do?

Answer
When you were putting the carbs back together, you may have messed up the needle and seat not allowing any gas to get into the bowls of the carb or tampered with the idle air mixture.  If I had to guess, I would guess the needles are stuck not allowing gas into the carb.  Try draining all of the gas out of the carbs.  Take off the fuel line and try to blow air through the fuel line.  With no gas in the carbs you should be able to blow air through the line, if you can't the needles are stuck.  When you are blowing, see if you can hear if all carbs are letting air through.