912 ULS2-01
Posted: Sun Feb 13, 2022 11:03 am
I have a new 912 ULS2-01 installed in my Gobosh. The mechanic who installed my engine used Evans Waterless coolant.
I am going to drain it and fill with an approved coolant.
1. What is the optimum coolant?
2. Do modern coolants have surfactants?
I've heard horror stories about how critical it is to "purge" the cooling system when refilling. Any tips? I've searched the Rotax website but can't seem to find the SI that details coolant installation.
I'm aware these questions have probably been answered again and again. I appreciate your patience. I have decades of Lycoming and Continental experience, but the 9 series Rotax engine is still a puzzlement to me.
Jim
I am going to drain it and fill with an approved coolant.
1. What is the optimum coolant?
2. Do modern coolants have surfactants?
I've heard horror stories about how critical it is to "purge" the cooling system when refilling. Any tips? I've searched the Rotax website but can't seem to find the SI that details coolant installation.
I'm aware these questions have probably been answered again and again. I appreciate your patience. I have decades of Lycoming and Continental experience, but the 9 series Rotax engine is still a puzzlement to me.
Jim