When I try to take off from idle(as if pulling up a water skier), my engine bogs down. If I pull back on the throttle fast enough, it wont stall. I have replace vro fuel pump and had carbs cleanedand changed fuel filter. Engine runs good otherwise except for occasional violent shaking on acceleration. If I start off slow it is ok. I tried a smaller prop and could not duplicate the problem, so it only bogs under heavy load. thanks in advance for any help.