Re: 1988 70 HP EVINRUDE
There is no magic juice that cleans restricted carburetors.They will have to be removed and serviced.You can leave them in place if you wanted to just remove the low speed jets and rod them out with torch tip cleaners.However the pickup tubes in the carburetor bowls are prone to restrictions as well.If you are not familiar with the procedure or feel uneasy in performing work yourself with the help of a manual,take your engine to a reputable dealer and have the carbs serviced.