i have a 1999 175 hp johnson i had proplems with the way it was running idle rough and would bog on full throtle take of if i throtle slow some times it wont bog i took to a dealer he said i needed a new vro pump it was getting to much oil so i bought a new one with gas pump connected i changed it my self the boat still runs the same i put new plugs new wires new gas filter new water seperator what could be the problem