I used to have a 3.o merc I/O and winterizing was a breeze. I just drained the manifold and the heat exchanger and I was done.
Now I have a new boat with a 2000 Merc 4.3. From what I can gather, I have 2 ways to winterize.
1) AF method. I have a winterizing kit (Camco 65501). basically run the water for 10 mins to open the thermostat and then shut the water supply valve and open the AF valve and when I see pink AF coming out the exhaust shut the motor off and I'm done.
2) Air Don't Freeze Method - My 4.3, being a 2000 with heat exchanger has 5 drain plugs. Pull all 5 and drain the water, ensure the heat exchanger is empty on the sea water side, and done.
Anyone see any issue with either of these? Thanks in Advance!!
Now I have a new boat with a 2000 Merc 4.3. From what I can gather, I have 2 ways to winterize.
1) AF method. I have a winterizing kit (Camco 65501). basically run the water for 10 mins to open the thermostat and then shut the water supply valve and open the AF valve and when I see pink AF coming out the exhaust shut the motor off and I'm done.
2) Air Don't Freeze Method - My 4.3, being a 2000 with heat exchanger has 5 drain plugs. Pull all 5 and drain the water, ensure the heat exchanger is empty on the sea water side, and done.
Anyone see any issue with either of these? Thanks in Advance!!