"Jon Klapper" wrote in message
...

Stupid Manual!!!! It says to replace the zinc in the heat exchanger
every year. The $#!!$ thing probably hasn't been replaced in ten
years
and I can't find it. The box of junk and odd parts that came with the
boat have two different size bronze plugs with zinc rods cast into
them. They obviously screw in somewhere but I'll be damned if I can
find them. One old plug with a corroded zinc has a bit of red paint
on
it and looks like its on the outside somewhere. Is it possible its
inside the heat exchanger? Should I pull the endcap?? Should I just
sink the damned boat and collect the insurance?

Anybody got a clue????


IF this is a '70s '80s vintage Westerbeke 30,
( AKA BMC 1.5 liter, built in England and shares the block and some
components with the MG 1500 auto engine)
The heat exchanger is bolted directly bellow the exaust manifold/surge
tank.
The zinc and cap are located on the bottom of the heat exchanger just
forward of the rubber end cap. You can replace the zinc with the cap in
place but often the old zinc will break off inside and need to bee cleaned
out. You also need to check the length of the new zinc, I usually have to
cut off 3/4" or so to clear the plate above the zinc fitting. I always
remove the rubber end cap for this job. Make a mark to index the cap to
the heat exchanger before you remove it, it has to line up exactly and
seal to the center plate inside the exchanger when you put it back on. Be
carefull with this cap, I was told by Westerbeke that these are no longer
available.