I want to add another, smaller generator to my boat.
Existing and new sets have indirect water cooling.

I have only one heat exchanger and the expense of
adding another seems a little high.

So I was wondering if anybody tried adding a second
generator to the heat exchanger of another engine,
with two Y connectors at the exchanger?
Engines would have a shared indirect cooling system.
Does this work? Do I need to install one-way valves at
the outlets to the cooler to avoid cooling water to run
through the inactive engine, or is that not an issue?
Cooling capacity should be ok for both engines since the
exchanger was sized for a bigger engine (bigger than my
'big' generator) but I intend to run only one genset at
a time anyway.

Thx, Al