My motor (95/90hp johnson) squeaks a little when steering, so I put marine grease on the horizontal shaft (unsure what the part is exactly called, but I'm sure those experienced w/ repairs know what I'm refering to) anyways I noticed 2 zercs (spelling?) on the front of the cowling, atop this "steering shaft"....I checked it in my manual & it says steering lubrication, Dealer performed service......isn't it as easy as just hooking up a grease gun & filling? What am I missing here? Should I really pay someone to do this, or can I just do it myself? It even says in the manual it takes marine grease......