Re: Yahmaha 200 2strokes
If you just maintain them and keep clean,fresh fuel in them all the time, they'll run for years. I bought my 90C Yamaha new in 1999 and it's never given a bit of trouble. Install a fuel/water separator, use fuel stabilizer like Stabil or Seafoam and learn to drain carbs float chambers a few times per year, but especially for lay-up periods of several weeks/months. Any water, debris, trash can accumulate in those carb float chambers and draining them is just a great preventive maintenance item. It's really good for your motors to run great, all the time, every time! Good Luck!
