Corrosion of the mixing elbow stainless steel close nipple cause a failure of the whole exhaust. While stainless steel offers some resistance to the exhaust corrosion, it is weak mechanically and failed at this point. It was covered in fiberglass insulation and was missed during the survey. The part failed 15 miles out of Anacortes, Wa on my way to Pender Harbor, BC. Has anyone found a better solution to the stock yanmar parts?