Originally Posted by Hydro Junkie

Had to call in some re-enforcement on this one since I only had a rough idea. What I was told is this:

• If you can't hold the motor by the end caps without burning your fingers, it's too hot. Now then, let's get to the details
• Using a infra-red temp gun, your battery packs, ESC and motor(checked on the ends, not the cooling jacket) should be no warmer than 140 degrees, with cool water going through the boat
• If the water is fairly warm(warm being over 70 degrees) it's not going to cool the electronics as well so you might see temps getting a bit higher, maybe to the mid 150s or so.
• Be sure you're not "over-propping" your boat. Depending on the weight of the boat, a 55-57mm prop is probably the largest you should be trying to run
• You might want to consider using a 200 amp ESC if you decide to really push the boats as my "expert" has recorded spikes up to around 170 amps with a data logger when the boat was jumping on rough water

Now, I've got a little bonus for you. My "Expert" has told me I can give you his contact information, if you want or need it. The restriction is it doesn't get put on the open forum so, if you're interested, let me know