On Mon, 25 Oct 2010 16:36:56 -0700 (PDT), Jack
wrote:

On Oct 25, 5:47*pm, bpuharic wrote:
marina will pull the boat this week and set it up on blocks

i have a freshwater cooled engine, with a heat exchanger. * my plan is
to pull the hose leading from the seacock and put it in a 5 gal bucket
of fresh water to flush the sal****er out.

then fill the bucket with 4 gallons of propylene glycol (the pink
antifreeze) and flush this through the engine, out the exhaust
manifolds and through the mufflers...

is this going to be enough? how fast is the engine going to empty the
bucket at 1000 rpm? any other secrets i should know about?

thanks much all

I've never owned an inboard or I/O, but do they have thermostats? If
so, it may be possible that without the thermostat opening, there
could be some passages that retain the raw water?

I thought I'd heard or read somewhere that some of those engines have
petcocks that drain the block, maybe just because of this?

Sounds like it's time for a professional opinion.

He has a fresh water cooled engine with heat exchangers. That means
that he already has (or should have) anti-freeze circulating through
the block and the thermostat. No worries there except to test the
anti-freeze and make sure you are protected for your climate.

On the raw water side, the technique you describe will work fine, and
4 to 5 gallons of the pink stuff will get the job done. It doesn't
take long to drain a 5 gallon bucket so this becomes a two man job
unless you have an on/off switch in the engine room.