Recently purchased a 1998 Honda 50 hp four stroke. During the course of repairs the mechanic advised me to drain each carburetor if I plan to keep the boat out of the water for 1 or 2 weeks. He advised that due to ethanol in fuel the carbs get get gummed up and within a year time the carbs will need rebuilt or cleaned. I also use Startron treatment at each fill up and instead of draining each carb would it do the same if I disconnect the fuel line at the ramp and let it run out of gas. What do you guys do?