I was reading in another thread where a poster (Don S) provided a link for an OEM service manual for an engine. Is this available for an outboard also? I have purchased both the SELOC and CLYMER repair manuals for my outboard and I really would like a manual specific to my outboard that shows parts and diagrams of the powerhead and lower unit. I have a 1999 Mercury 125 HP 4cyl 2 stroke, S/N OG823168. Any idea what EXLPTO represents? It is on the serial # plate also. Still new at this and 'preciate any help.