"Bob" wrote in message
...


I've thought about installing this setup on my boat (130hp Volvo I/O),
but I was concerned that, when using the garden hose for water, the
water would not be sucked up by the engine mounted raw water pump and
instead just go out the hose that normally carries water from the
outdrive's water intakes to the water pump. Am I wrong about this?



In normal operation, the water pump has to suck water up from the bottom of
the boat through that very same hose. There is a possibility that IF the
hose diameter was very large and the water stream from the garden hose
rather small then the trickle of water from the garden hose could fall down
the water inlet hose while air traveled up and thus the pump wouldn't suck
water.

On my boat, a tournament ski boat with a 351 cu-in V8 engine, this was never
a problem. I would turn the hose on and get a good stream out the bottom of
the boat. When the engine started, it would suck ALL of the water up, none
would go out the bottom.

You can tell right away if it is working or not. If the exhaust is coming
out dry then you aren't sucking water. If the exhaust has a lot of water in
it then things are fine.


rod