1999 Honda BF75A cooling

Joined
Sep 8, 2013
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1
What is the function of the relief bypass valve? does all the water from the pump go to either the indicator hose and the relief valve/water bypass hose? From there where does it go? The indicator hose was plugged at the plastic tip end, this was the second time this summer so I removed the plastic tip restrictor.... giving free discharge and a good indicator stream; is it OK to leave it opened like this?
 
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