Hi Phil- Thank you for the information. I have spoken with the service manager at ADE's head office and have purchased spares such as FW pump bearings, etc and will be swapping them out this summer. I will also write to Bob Senter as you suggest. There is no substitute for experience when it comes to a particular engine model, and it sounds like he must have it. I'm fortunate to have had a career as an (operating) engineer and so I do my own work aside from injection equipment. It's the quirks peculiar to the LP668D aka Deere 6068, and the MTBF of certain components that I'm interested in. Thus far, no moving parts other than the Jabsco impellers and the serp belt have required replacement, but since we do make offshore passages routinely I'm not stingy when it comes to maintenance. Better to do it in port than out in the Stream rounding Hatteras on one engine; I'd rather have a failure in the middle of an ocean than have it there. Interesting also to learn of the dearth of answers on the Owner's site - I suppose that many owners hire their engineering work done and therefore aren't too interested. Interesting also that you were taken to task by the list owner. There are, however, obvious but unstated relationships between certain manufacturers and some boat owners; list owners, too. To Georgs credit, I have not seen such bias here, despite my often inflammatory writings! Regards, John "Seahorse" John, I did not realize that you had a Lugger. Recently, Alaska diesel through Bob Senter has been conducting a series of engine seminars for Lugger Diesels. I went to one last winter in Seattle and Bob spent most of his time talking about the 668. I was the bastard child in the group with my N50 and its 6801(?) which they no longer produce. Because of the popularity of these seminars, Alaska Diesel has been expanding the program and offering seminars in other parts of the country. If you are interested in attending one, I will gladly forward any dates that I see come up on the Nordhavn Owner's site. [I just checked and the posts I saw for seminars was from a couple of owners HOPING that Bob will conduct a seminar at Mystic in August or in the Chesapeake Bay area.] Contact Bob Senter for future seminars: bsenter@northern-lights.com. I also checked all of the posts from the beginning of 2007 and many of them were boat specific: a 57 owner asking how other 57 owners stored their tenders, a 46 owner asking about zinc locations. Some posts would be useful to PUP, but they have already been covered: an owner asking about the effectiveness of Prop Speed. Still others are very technical: Mickey Smith posted the settings for the Xantrex SW2512 inverter for charging AGM batteries because the settings listed in the manuals and the default settings were wrong. Many owner's ask questions that are never answered on the owner's site and would be better served by PUP or Trawler World: ie: a recent question about getting air in fuel lines. Why more owners aren't members of PUP or Trawler World and why the Nordhavn Owner's site does at least allow reading by non members, I don't know. Maybe, the way the board is set up on Yahoo doesn't allow it. Many members do belong to both boards and regularly cross post such as Scott Bulger and Scott Strickland and myself. Others, such as Dick Barnes aboard Ice Dancer II, posts on PUP and never posts on the Nordhavn site. Who Knows! I actually got chewed out by the owner of the Nordhavn list last Fall because I posted my cruise summary for my California to Hawaii crossing in PUP and not the Owner's Site. Phil Eslinger Flat Earth N50 ************************************** See what's free at http://www.aol.com.