I have a 1984ish, Evinrude 8 hp Yachtwin. The grease fitting under the gear lever pulled right out when I tried to remove my grease gun. I have determined the whole is a bit stretched out: even a new grease fitting does not grab the hole hard enough to withstand the grease gun being pulled off.I have some slightly larger grease fittings from the autoparts store. I am planning on tapping the hole for one of these larger fittings. Any tips before I drill and tap the whole for the larger fitting? It has been 20 years since I have even seen a tap and die set.