I just bought a pontoon boat yesterday and it has a Yamaha 2005 60 HP TLRD on it. The engine only has 60 hours of runtime. When I remove the engine cover, it looks brand new. The problem is that I can only get it to run on choke. While it's running on choke, if I flip the fuel switch to 'normal run', it stalls. From what the owner says, he hasn't run it for about 2 years. Do you think I need to clean the carbs? Is that an easy job? It looks like I have one carb per cylinder though, ughhhhhhhhhhhhhhhhh.