It took me some time to find a good position for the water radiator of the Rotax. Most installations put the radiator to the front of the cowling. I couldn’t find an appropriate position at the front, so a decided to use the air outlet for the radiator.
So picture shows the radiator mounted near the firewall. A special mount connects to the motor mount. If necessary I can fabricate an appropriate shroud later, which will prevent air going around the radiator.