"DSK" wrote
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

Thanks ... I was afraid of that.