SailNet Community - View Single Post - New engine intake thru-hull mounted wrong?!?
View Single Post
post #13 of Old 05-19-2009
Senior Member
Join Date: Mar 2007
Location: New England
Posts: 966
Thanks: 0
Thanked 7 Times in 7 Posts
Rep Power: 11
Okay, I am not familiar with the Volvo Motor

that the OP mentions, but exactly how does the water flood the engine past the Raw Water Pump? On my boat the water enters the boat through a thru-hull past the shutoff seacock (when open) through a short hose up about 8 inches to the Raw Water strainer, out of the Raw Water Strainer through a hose the drops about 7 inches and goes into my engine mounted Raw Water pump.

My Raw water pump, as many others here, has an impeller that has 6 rubber fins. These fins block the water from flushing through the engine unless they are turning and they don't turn unless the motor is on. So unless the OP's motor and Raw pump are set up differently, I don't see how surfing down a wave or another way of achieving a speed that "scoops" water in, will force water past the stationary impeller.


If you liked my advice/response, give me some rep points. If you didn't......well what do you expect, it was free.
DrB is offline  
Quote Share with Facebook
For the best viewing experience please update your browser to Google Chrome