Was your 200 "making oil" ( gas dilution of oil)? This is a known issue with the 200 but Yamaha will not "accept" it as an issue. Just wondering if this issue could lead to a catastrophic failure such as yours. I wish you best in getting it repaired...something like that (or "oil making") should not happen to modern technology engines.
I said this earlier, but once again I'm sick you're having to deal with this. Thank you for sharing this great post, pictures, information and description of this issue. I've been actively boating since the 1960's. I've had 2-strokes, diesels, I/O's, inboards etc.... never have I seen anything like this... Now, we boat 85% + in brackish water, and yet I still fresh-water-flush the engine for 15-20 minutes EVERY time I run the boat.... I also keep a Yamaha cover on the engine 100% of the time that I'm not using the boat; I can't imagine that's a factor?.... I can hardly wait to learn what the experts conclude as the cause.
Yes both of my engines made oil. Both at an equal rate which diminished over time to a very little amount. I never let them go above the full line on the dipstick. I have it all documented in oil analysis from Blackstone Labs. What helped the most was filling to 1/4-1/3 on the dipstick with each oil change of conventional Yamalube 10W30. No synthetic oil. Both engines ran for 598 hours without missing a beat until this happened and the only thing I noticed, until the hole in the cowling, was a change in the tone of the effected engine on start. Even with all the damage done they still made 5900 RMP at WOT.
Wow that is crazy! Did the dealer ever diagnose what caused the problem? Good luck and hope it is repaired soon.
They had nothing to offer. The only comment he gave was that they had no signs of ever overheating. I thought I have been doing everything right to keep these engines happy for a long time.
