Jake - thanks for the post, this is more or less exactly what I did after I read the shop manual and looked at the engine. Its good that your response will reside in the archives. The hose size required is 5/8" ID.
Dave Dave, The mixing elbow is a common culprit. Removing and cleaning it is always a good idea. While you have the injection hose off, run the engine to check for water flow (point it into a quart jar or something like a milk jug). You should see a regular stream of water. If the water flow is insufficient, the problem is further upstream in the heat exchanger, hoses, or the water pump. I'm assuming you cleaned out the strainer. Lastly, make sure the thru-hull is clear also. The intake for the engine cooling is rather small. I pull the hose of the intake side of the raw water pump. It should flow freely. Jake Jake Brodersen C&C 35 Mk-III "Midnight Mistress" Hampton VA
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