marc, yes you did. at one point, another made mention of his raw water cooled
engine. hence, my post.

Original post

I have an 18HP yanmar 2cyl and would like to put in an aux heater from
the
internal cooling system (glycol). There are many plugs, thermhousing,
side
of block etc... so i am unsure where to tie in for a send return that
won't affect the cooling of the motor. any thoughts?

Taking his post at face value with the reference to the "internal
cooling system (glycol)" I understood him to mean a Yanmar 2GM20 F
and answered accordingly and specifically..




On 30 Mar 2004 19:45:43 GMT, (JAXAshby) wrote:

note that a 2GM20f is **freshwater** cooled. a raw water cooled engine is a
different breed of cat.

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.



On Mon, 29 Mar 2004 16:27:45 -0400, none
wrote:


I have an 18HP yanmar 2cyl and would like to put in an aux heater from the

internal cooling system (glycol). There are many plugs, thermhousing, side

of block etc... so i am unsure where to tie in for a send return that
won't affect the cooling of the motor. any thoughts?
rick