Gasman, did you end up getting this fixed? I have a recently purchased 1998 90HP ELPTO with a similar problem. Previous owner believed leak was from cap on oil tank, but can't see any evidence of that. My oil lines look and feel like they're in pretty good nick, so I think it might be coming from the oil pump. Am going to pull the bottom cowl off and degrease the area to see if I can pinpoint exactly where the leak is coming from, but would like to hear where you narrowed yours down to. Cheers.Originally posted by gasman2002:<br /> I have a 2002 40ELPTO that is leaking oil from the Oil injection system. It is not a cracked plastic line, but I can't seem to find the leak. Any suggestion?