Carbs leaking

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I have a 1990 Evinrude 155 commercial engine on my V 20 and maybe someone here can set me strait. I had the 3 carbs cleaned this week and the motor runs pretty good it can only get 4500 rpms, the same as before the cleaning . I would like to get at least 5000 but I can live with it. My main issue is when I tilt the engine all the way up, its almost horizonal and the carbs leak or empty out into the carb cover. When I tilt it back down the gas drains from the cover into the cowling base and down the outside of the shaft housing. I do not smell fuel when its in the down position out on the water so its not leaking when in use just when I have to tilt all the way up.