I am having problems with my Hammer EP.
It will run fine for 5-7 minutes(with 3000 mah batteries) then it will stall out for a few seconds then start for a few seconds, then stall again.
Dont think its radio problem, since it will do this even at very close range.
The motor is staying cool, the water coil seems to work well.
Wondering if the ESC could be going into protect mode and shutting off power to the engine.
The boat is stock, have tried different batteries, but that is not the problem. The batteries do seem to get a little on the hot side of warm.
The boat seems to still have plenty of power left when it does the stop and start routine.
I greased the shaft and oiled the engine.

Also wondering if some boats do this when the batteries start to drain, normally a boat will just gradually slow down, so you know to start bringing it back to shore. My boat starts stalling befor I notice it slowing down.

Any help will be appreciated.