I have a 2001 200 hp ficht E200FPXSIF with 480 hrs and I just swaped out the thermostats with the etec 5005440 to help the the carbon buildup issues. Before the replacement, the engine temp was around 131 deg F at idle. After installing the etec thermostat, the engine temp is around 165 deg F at idle in the driveway with no load. The temp readings are from the diagnostics software hooked up to my laptop. I was expecting about a 15 to 20 deg increase, but not 35 deg. From other posts I've seen 150 deg idle temp, but nothing close to the 165 deg F. Should I be concerned or is this normal?