"Vito" wrote in message ...
Went to winterize my Atomic "bomb". Disconnected the hose from the
thru-hull and stuck it in a jug of anti-freeze like I always do and started
the motor. This time it didn't suck up the antifreeze. No doubt the
raterfratzin pump again.

Do you have a thermostat?





So I order the latest and greatest from Moyer -
marvel over the improvements awhile - then spend hours lying on the cabin
sole working through a small access port to install it. Ahh ... that'll fix
it for good -- NOT. MFr still don't suck. So I disconnect the short hose
between the thermostat and exhaust manifold (like I should have done before
buying a new pump) and start the motor. Presto - antifreeze all over the
cabin! Replace that hose and remove the one from the manifold into the
exhaust mixer. Got water there too but none into the exhaust. That's
plugged solid! Anybody seen that one and know how to fix it?

"Joe" wrote

Do you have a thermostat?

Yes, but it's working. The blockage is downstream after the water comes out
of the jacket around the exhaust manifold - probably in the cast iron
inverted U where it gets injected into the actual exhaust pipeing.

Thanks for the suggestion.

"Vito" wrote in message ...
"Joe" wrote

Do you have a thermostat?

Yes, but it's working.

OK thats great. That is the close loop system.

Now here below what your talking about is your raw water system right?


The blockage is downstream after the water comes out
of the jacket around the exhaust manifold - probably in the cast iron
inverted U where it gets injected into the actual exhaust pipeing.

Diffrent pumps... different system.

The inverted U is called a rise. It is put there to keep water from
coming back on top of your pistons. Now unless you have the system
sealed you will not have enough pressure to overcome the standing
water in the rise. Seal it up, start it up, go outside and look. If
you can see it, not sure how your exhaust is ran it may be under
water. If your winterizing your raw water system that is the wrong way
to do it. What you wanna do is close your seasuction, open your
strainer start the engine as you pour antifreeze into the strainer,
That is if your strainer is properly mounted. This will fill the raw
loop to the riser.

Seldom will any exhaust pipe get clogged before the walls go.

Joe




Thanks for the suggestion.

"Joe" wrote
The inverted U is called a rise. It is put there to keep water from
coming back on top of your pistons. Now unless you have the system
sealed you will not have enough pressure to overcome the standing
water in the rise. Seal it up, start it up, go outside and look. If
you can see it, not sure how your exhaust is ran it may be under
water. If your winterizing your raw water system that is the wrong way
to do it. What you wanna do is close your seasuction, open your
strainer start the engine as you pour antifreeze into the strainer,
That is if your strainer is properly mounted. This will fill the raw
loop to the riser.

Thank's again. I've been too sick to use the boat for several months and it
looks like the riser where the water from the engine goes into the exhaust
has become completely plugged to let any water through. I can run the motor
briefly and exhaust gas comes out normally but without water. And since it
is plugged no water gets pumped out of the strainer. I disconnected the
hose going into the riser and pumped antifreeze thru the motor to winterize
it (the extra went into the bilge) but will have to fix it when I get my
health back. Thanks again for the info.