MMM Heat Question

[MikeW]

Hey guys, was running my Kyosho 777 today, it is geared 13/46 with a NEU 1512 2.5D 2050kv on 5S 20-30c Turnigy. I was doing ~10 quick laps on a very small track, never giving it the beans.

Today's temp was around 60F.

Motor temp 120F
MMM V3 ESC 120F at the fan in the middle of the run
150F at the end of the run

Batts where around 70 tops.

Is the reason the car is under geared why the ESC was this hot? The ESC fan also did not turn on at all. Is there a way to test if the fan works? Physically the ESC is in great shape, today was the only time the ESC has been this hot.

I'm using a Raytek MT-4 to check the temps.

http://www.toolsource.com/prod_medium/92165.jpg

Thanks in advance for the advice.

Mike.