Well I have finally found out what the problem was with my 250xs. #6 cylinder is scored. I post a question on 1/8/10 about cylinder overheat and found a dealer who would help me. Went there this morning. Computer found no faults. Pressures were air 108 and fuel 94. Compression check revealed all 110 except #6 which was 95. Pulled head and there it was. Scored.
This motor had shut down last fall in very cold water after about 1/4 mile. Was warmed appropriately prior to take off. Motor restarted with knock and miss. Eventually it shut down again with no alarm. It eventually cleared itself and knock went away. 164 hours. Now I found out. Not too happy but what are ya going to do.
Now what do I do. Its an '04 with no warranty. What is best option. I don't have prices yet but here is what I was told as ballpark.
They can send block out to be re-sleeved with new piston on #6. Doesn't appear any other damage than scoring. Approx $5000-$6000
Get new block pistons from merc $!0,000.
Get new motor and sell off the parts.
Anybody with any advise?