Recipe for 'glykolering'

In our Volvo Penta B18A 75 hp gasoline engine a mixture of fresh-water and anti-freeze fluid cools the engine, and that mixture is cooled by seawater. It's a cooling system by swedish manufacturer Martec, probably this 901-1015 type (PDF).

Before the winter sets in, one has to get rid of the seawater and replace it with and 50% mix of fresh-water and anti-freeze.

For us, that means:
- put a bucket below the boat under the exhaust pipe
- prepare another 10 liter bucket with the 50% mix
- take off the hose coming from the seawater inlet
- insert one end of a 1 meter hose in the bucket and connect the other end to the water pump

In the photo, the red arrow shows where to connect the "bucket hose":



As the engine has been cold for two weeks now, we use this starting procedure:
- switch on the batteries
- run the engine fan to get rid of any gas vapours
- pull the gear-switch plug up/right to neutral
- as there's currently no choke button/cable, use the hand pump on the side of engine to pump gas
- also spray some "gas starter" on the black thingy
- push the gas about half-way in and turn the key to start the engine

Now the engine is running and the water pump will suck in the 50% mix. Continue until the bucket is about empty (also the water coming from the exhaust pipe should be 50% mix by now).

Then just turn off the engine and wait for springtime!

Shopping list:
- 5 liters of anti-freeze fluid (glycole)
- 1 meter of rubber hose (outer diameter 23mm, inner diameter 19mm, approximately)
- some hose clamps