couple more things,
1 are you sure the screw is missing? on one side of the carb is the low screw towards the bottom, and the opposite side is the high speed screw, but there is also a boss that may look like the same hole and it is not drilled. you may not be seeing a screw and assume its missing???
2 if you are saying you pulled the wires out of the rubber and shoved em back in then that coil wiring is done. if you are saying the wire and rubber moved out of the protective covering sometimes found on them then no biggie.
3 are you flushing the ski?? if so how much water is on the hose and are you starting ski, flushing, shutting off water and revving ski and then shutting it off?