Vito wrote:
... The part of the exhaust that carries the
exhaust gasses away is not plugged. I can start the motor and exhaust gas
comes out normally - just no water. Nor will the pump suck up any water (or
antifreeze) while the system is hooked up normally. But if I disconnect the
hose where it connects to the top of the inverted U casting to join the
exhaust gasses and cool the hoses then plenty of water (antifreeze) comes
thru and runs into the bilge.

Well then, the water side of your injection elbow is plugged up. It
happens, usually due to rust. I just finished replacing one last weekend.

Unbolt the "inverted U casting" and seperate it from the exhaust hose (a
bitch of a job once it's overheated, as ours did) then take it to any
shop that can sandblast it well- inside & out. Check to make sure that
water can run through the injection side and that the pattern is still
good... if the inside part that sprays the cooling water into the
exhaust is too rusted away or eroded, then the whole thing is NFG.

I bought a new one and am keeping the old one as a spare... not that I
expect to need it for about 15 years or so...

Fresh Breezes- Doug King