- Action: To Do List item A0085 - Remove and delete the Chiu Tong ball valve.
- Completed: 13 April 2016
- Cost: $0.0
The reason to delete the Chiu Tong ball valve was its inner diameter exhaust passageway was 2.5-inch instead of 3.0-inch as stipulated by the Yanmar diesel engine installation manual, the valve was made of ABS plastic and not rated for the exhaust temperature levels, and its installation used single clamps instead of the USCG regulatory requirement for dual clamps on exhaust hose connections. Also this was a potential point of failure that is uncommon in most exhaust installations - forget to open it one time on engine start and you'll be pumping seawater into your engine cylinders - a very expensive potential mistake. The red handle was extremely difficult to open and close - possibly due to heat degradation.
Had difficulty removing the T-bolt hose clamps as the threads were buggered up due to being over tightened - all the clamps were non-reusable and scraped. Was able to separate the 3-inch exhaust hose from the input side of the ball valve. The short section of 3-inch hose between the ball valve and exhaust thru hull could not be separated from the ball valve as some type of adhesive/sealant was used during its original assembly. The Chiu Tong ball valve with short section of 3-inch hose was scraped together.
