Also a good idea to put a bypass on the heater lines, that way you
don't have to fill (6gals) the heater with pink stuff. Or at least
make the lines long enough and accesible. Mine is a PITA to get to.
And don't forget to drain the heater for winter.

Scott


Marc wrote in message . ..
If you put an inline tee fitting with a cap, you can fill the hoses
with anti freeze and bleed them much more easily.

On Tue, 30 Mar 2004 11:22:09 -0400, none
wrote:

thanks a lot Marc.
Out thru the T-stat housing (which i see) return thru the water pump low
press side...which i will locate.
My manual doesn't appear to have that info.
Rick
.
On Tue, 30 Mar 2004 14:29:16 GMT, Marc wrote:
I am referencing the Official Yanmar Service Manual for the 2gm20f.

One connection is a plug on the fresh water pump on the hose side that
leads from the heat exchanger. The other is a plug on the side of the
thermostat housing that leads to the heat exchanger. They are both
3/8" npt fittings.
snip...