I have just recieved a Splendid Splinter marked 7.5 HP on the cowl, model # 217-59490, s.n. 3B 199471. I can see McCollugh on the recoil housing. I am about to dive in to this. WHat are my first steps, it is marked as air cooled so I dont need to put it in a tub of water to test? I have...