Only remove the oiler to pull the plastic shaft and gear, pull them both out. Put the oiler back on tight. Now run 50:1 2 stroke oil. If you have to re-jet, now is the time to do it. Depends on a lot of conditions, temp, pressure, altitude, etc. If you leave the wires hooked up, pull one off the back of the red light on the dash, so it doesn't light up. You can keep oil in the stock oil tank, as a just in case someone needs oil. Just put a pet-(This word is unacceptable on Trapperman) on it and wire it closed until you need some extra oil on the trail or your friend runs out, or if it's really cold like -40 below zero or colder. I think someone put notes on this in the archives that I wrote up a few years ago.
Temperature both cold and hot will work over that little plastic gear. You should be scared of it. Pull it and go pre-mix, rejet it and you can go from -40 below zero to +40 above at Sea Level.
Only takes a missing tooth on the gear, then you start it and it's cold and breaks another, then it's been sitting, so it breaks another. Now it's going round and round, no oil, then plenty, then none, then plenty. You get the idea. Pretty soon enough of the teeth break off and not enough oil, it goes boom. You pull the cord and there is no resistance. There is a stripe down the front side of your piston. Your done. Walk home and rebuild the motor yourself for $600. It's going to be $1400-$2000 or more at the shop. Holler if questions.