I know it's not 717 but this covers both on this. Now for instance the page before this 717 gets blue Loctite on manifold bolts. 787 gets Loctite 515. That's all it says about bolts and torque specs for the head pipe. It doesn't separate the two. This manual I have is for the year and covers the make of my boat plus the other ones. I'm going to put it back together one more time. Also going to Mark the bolts and watch it like a hawk. If It loosen I'm going to stop and get towed in instead of limping it back. I'm also going to go against the book this time. I'm going to put 515 on the threads. I had three bolts and nuts that I test it. One with 242, another with 248 and last the 515. 242 set in 12 hours could not turn by hand. 515 set in 30 minutes could not turn by hand. 248 24 hours later could still be broke free by hand. The 515 penetrated the threads really nice and even had a good beat at the end. I was really impressed by that. Supposably from what I've read that's why the manifold bolts get torque with that as it doesn't break down as fast. So why not use it on up the pipe? The blues not holding it. I totally agree with you that I have another problem and that counter balance shaft is what I suspect. Just a little insight. I've been turning wrenches for 30 years (not on Seadoo) and I have never ever done something so many times. Usually if I have to repeat something it's because of a defective part. It's been years since that even happened. My Explorer I had with a 717 had the same gasket blow out. I'll loosen the pipe pulled the old gasket out and put the new one in. I tighten the bolts by feel and ran it 3 years before I sold it without any problems. If I can get it through this season I'm going to buy that short block. Well regardless I'm going to get that short block I'll just be down for this season which sucks!