Hello all i just bought a cc with a 150 johnson on it 2001. At trolling speed it shimmys. Im told by different people that the carbs need to be cleaned and other are telling me that the carbs need to be sync. What i did to it is new plugs and fuel filter. The boat jumps up on plane and wot 36mph. Whst should i do and if its the linc and sync how do u do it thanks
