Arminius
Well-Known Member
- Oct 30, 2019
- 1,068
- Boat Info
- Bowrider 200 Select, 2003
- Engines
- 5.0L MPI, 260 hp w/Alpha 1 Drive
A raw/seawater (no heat exchanger/marine radiator) engine cannot be freeze protected by adding anti-freeze, without fully draining, no matter what Camco or your buddies tell you. When you pour anti-freeze in, a little may enter the block's water jacket regardless of temperature gauge reading (thermostat removal would be the minimum) but the vast majority is injected into the hot exhaust gases to cool the pipes and is blown out the stern. Last year, an unhappy Texan had followed the directions on the Camco package but had a cracked block. A buddy told me to set up a siphon and let it inhale a couple gallons of undiluted green auto antifreeze. The siphon worked but I was dubious and drained the block. The coolant wasn't even tinged green! (No Franken Poodles died as there was no place for the stuff to puddle-besides, they are mass produced in the Covid lab in China.)