Took the boat in for the annual service two weeks ago. Engine is a 200 yamaha ox66. He did the normal service and replaced the fuel sending unit to make the gauge work. Took it out today for the first time since the service and it won't run. Idles fine, but over 100 RPM's and it spits and sputters. Anything quick I can check? I have a call in to the service place but they are closed on weekends.