SX/SXi/SXi Pro Coolant water pathway from cylinder block to exhaust.

Location
Australia
That upside down U shaped water line from the head to the exhaust system, the one with the flush cap on it...


Is that the only pathway for water to exit the cylinder block and enter the exhaust on a stock 750?
 
Location
Australia
The reason I ask is because I've been reading about the problem of motors flooding while being towed behind a boat.

http://www.x-h2o.com/threads/67551-Towing-ski-behind-boat

One way to prevent this is to put a small ball valve on the coolant line to the manifold but the other day it occurred to me that leaving the flush plug off and the electric bilge on could be an alternative way to prevent engine flooding. Provided the battery and bilge pump are OK, water should trickle into the hull and then be pumped out the side.

Would this work?
 
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