I have a 1997 200hp Johnson Venom J200STLEUB, here is the deal, It idles rough when i give it gas it dies, i can choke it and keep it running but will not get above 3200rpm's, comp- 120 all around changed the stator, timer base, and power pack, i pre mix my oil (disconnected oil side of VRO), primer bulb stays hard does not seem to have air leak, If it is my fuel pump can I change to a conventional put since i pre mix?