I have a 70ETLK yamaha outboard, I recently removed and cleaned the carbs and put it on the earmuffs it ran great. I decided to lake test it today and when I accelerated it was VERY sluggish? If I tried to go to full throttle from half it would nearly die on me. the only way I could get it to plane was to slowly accelerate more and more until it finaly got up, this took almost 300 yards!? doese any one have any idea why it lacks so much or where to start looking?