[Alberg30] Yanmar 2GM20F Installation -- Siphon Break

[Voyager Toronto]

Yanmar installation notes I've seen call for placement of a siphon break 
between the engine manifold and the water injection point on the exhaust if 
the engine is installed "below the waterline". The same advice is given in 
Nigel Calder's book. The goal is to prevent backflow of water into the 
engine. Can anyone say if the 2GM20F installs above or below the waterline 
in an Alberg (...how would one determine this)? Any advice as to whether a 
siphon break is necessary, and how to install one?

Calvin, Voyager #30

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