On Tue, 09 Dec 2008 16:28:17 -0500, Wayne.B
wrote:

On Tue, 09 Dec 2008 13:55:38 -0200, loonfellow@lakeside. wrote:

...I have drained water
from the petcocks on the engine water pump and also
from what appears to be an inline pump that has two lines
for cooling the differential gearbox. ...

Also, somewhere I got the idea that it's good to open the
system where the thermostat would go....

***

The easiest way to do this is to fill a 5 gallon pail with non-toxic
anti-freeze, the pink stuff rated for 100 below zero. If the boat is
still in the water, warm up the engine first. With the engine shut
down, disconnect the water intake hose at the strainer. If the
hose is long enough, put it in the bucket, otherwise make up a short
extension and place that in the bucket. Remove the air filter from
the carburetor. Start up the engine and watch the anti-freeze level
in the bucket. When there is about a gallon left, spray fogging oil
into the carburetor until the engine stalls. If it doesn't stall,
just shut it down. Replace the air filter and re-install the water
intake hose. Close the intake seacock and pour some antifreeze into
the strainer.

The engine is now winterized.

Nice post!

BrianW