Premix?
You say you are using premix. It will save you time and money in re-installing the pump, but you'll have to understand how to syncronize it. In the boat section, I've created a thread that you may find interesting about the oil pump and how to align the to your carbs.
What I wanted to know here, is you say your premix. Is the oil tank still there? And does it have oil in it? The rotary valve chamber must be flooded with oil, so they tank has to stay there. So, I hope you still have it on.