More on Anti-Siphon Valves
Warren Elliott

February, 2008 Hull #: C380 #44

Although there is more than one of these devices on our boats, the anti-siphon valve for our engine is very important, as discussed in the previous few Mainsheet issues. If it fails in the closed position, water is likely to back up into the exhaust manifold and damage the engine. At least one of our C380s engines was badly damaged this way, and more engines out there may be in trouble.

In case some of you are not aware of this device, it’s mounted on the forward side of the bulkhead just above the engine. See our section of the May 2007 Mainsheet for the original article on this subject, including photos.

In the previous [November] issue, it was concluded that the best way to monitor the valve’s operation [engine off] was by inserting a small screwdriver,