Originally Posted by Nord Sal
My seawater pump
is a Sherwood F85
. I looked it up and it and it shows it is bushed down to 1/2" ports
from 3/4", (snip)
For the more machinist orientated, would it be feasible to tap 3/4" NPT threads into the existing pump
if it's not bushed or are the 1/2" NPT to close in size? My pump is older and I don't think it has a reducing bushing.
The pump you linked to is a G-65, that's why it has bushings. The original F-85 had 1/2" ports
, and there is definitely not enough meat on it to drill and tap to 3/4 NPT.
The 1/2" NPT nipple suggestion is sound. A few years back when I replaced the manifold on my 1978 Atomic 4, and found that the cooling
hose connection from the manifold to the exhaust elbow
was, in fact, a cut-off pipe nipple. In fact, I built up a replacement elbow
using 316 SS pipe nipples and fittings, and silver brazed a cutoff 1/4" nipple into it for the water