The astute saleperson at Camden Hobby Stores advised me that a 4 stroke engine would be "much easier" to start with using an electric starter. Now that I have parted with my cash I want to try and get some use out of the starter if possible (and be gentle with my precious engine as well)

While applying the starter, should the prop nut just be firmly touching the silicon or does the nose of the nut need to be squeezed into the 1 cm hole ?