- Aug 5, 2010
- Burnet, TX
- Kubota L2800 HST, Kubota Z781KWTi
What is the source of your water. Is it possible that it may be your water? Also when flushing most engines, all of the water will not drain out when finished, some engines may retain up to 50% of the system capacity. In the case of my L2800, it only took half of the system capacity to refill after flushing. I suggest also not using 50/50 premix for this reason. You may only end up with a 25/75 ratio of antifreeze to water. That will only give freeze protection down to 10 degrees. I do not know what will happen to the antifreeze solution when it freezes, but what you describe may be the result. When flushing it is suggested to add 100% antifreeze first. Add 50% of the system capacity and then top off with distilled water.