'84 Merc. oil injec. 150hp

[Keith]

I can't remember if I asked this before or not sorry. I have an '84 mercu. 150 w/ oil injec. upon start and idol this thing is smoking ( I know if it's smoking it's getting oil) and after running around for a while it's still smokes not as bad as start up. Could this be an inject problem or just old age? If I try to adjust the oil inject. how would I know if I am adjusting it right and to make sure I'm not cutting off to much oil? Or should I take a second mortage out and take it to the shop? Any advice would be greatly helpful. Thanks as always for your advice.