Wait a minute, you drain through the zincs, blow out strainer then fill with antifreeze, connect to a five gallon bucket and just bump the motor a couple times, not running it, and it takes in four gallons ? That's it?
Russ, yes, that's it. The strainer will take 2 or 3 gallons and the 5 gallons in the bucket so 8 gallons per engine if that was unclear. When I said "bump" I mean the engine operator presses the ignition switch when I tell him/her I'm ready at the engine. Just the turns from the starter will start to suck down the antifreeze. My engine usually starts so fast that the engine does start running but if it starts the antifreeze really goes fast and I am yelling "stop" within seconds because it's all gone.