I'm having troubles with my 3.0 tks when initially starting it up it intermittently runs sometimes it stalls immediately, sometimes it lags and runs about 400 rpm (very rough), then other times it runs smooth but at 1200 rpm. As well as when I'm running across the lake when I throttle back it stalls. The only smooth idle I can get is when its around 1000 rpm. Runs fine as long as I'm tooling along above 1500 rpm. I assume its all in the carb and this tks has been impossible to adjust i can screw in the mixture screw all the way in or out and it doesn't seem to cure anything it runs better with it adjusted all the way out but still isn't reliably running. Has anyone replaced this carb with a standard electric choke carb and does that throw off the timing. Help please ive owned this boat for 2 weeks bought it from a marina who have been unhelpful and basically refuse to work on it. The boat is a 2005 180 sea ray sport with 3.0 tks.