Hi All, I have an early 70's Johnson 70 Hp outboard that runs well at idle and up to 1/4 throttle but when I go to full throttle the boat does not increase power. At full throttle it runs smooth and does not die and when I check the throttle cable and carburetor linkages they are at max but no power. The compression on the motor is good, 120 psi on all cylinders and I have good spark. I have read postings and it appears I may have a fuel problem on full throttle. I have ordered a new fuel pump and will be replacing some of the fuel lines, the 3 carburetors have small fuel that are tee'd together, should I replace them too ? the top and bottom are premoulded 90's so I don't think replacement fuel lines would work without kinking them or should I just remove them and clean. Any help would be appreciated.