i was out yesterday and my boat motor was running fine but about 2 hours into my trip the motor started bogging down at 3500 rpms. could go up to 10 mph but no faster, would just stall out. i lifted the stearndrive out of the water only to find a little bit of seaweed tangled around the prop. i need to know if seaweed could bog it down like that or if im having carb problems. just unstuck float in carb 2 days ago.