Having read the previous posts, and in the spirit of one engine per thread, here's my 200 4 stroke story. I immediately marked the head with a sharpie when I found out about this issue. Things went fine for a while. Last weekend I checked, and the line was no longer horizontal. I put a wrench to it, and got about 3/4 of a turn(maybe more-can't remember). Nothing bad happened after two trips and the line hasn't moved again. I thought about removing it and applying locktight, but I know nothing about how the cross piece is supposed to be orientated, and since the black line did not come back to the original orientation when tightened, I was afraid I was not back to the original indention or whatever. My self-rated handyness score is roughly 3/10.
So, I call my dealer first thing Monday morning. I was told I had to bring the boat in to pull hours and then another trip for the install. To avoid two trips, I am just ordering the part myself which my dealer agreed to. So, you guys may want to check ahead to see about the potential two trip thing, as I know many of you are not exactly close to the dealer. If your dealer already has the part, this may not happen, but mine did not.