PS 2 electronics gets very hot

Is that 7.5 Amps all the time at any track voltage - or just when you start moving?

Your arrow is pointing to the bridge rectifier.  All power into the PS2 electronics goes through that device.  7.5 Amps at, say, 15V is over 100 Watts!  That energy is going somewhere.  Nothing on the board can sustain that kind of power without melting, smoking, or whatever.  Tell us more, but I'm guessing the power is going into the motor(s) possibly from a sticky mechanism or whatever.  Can you turn each flywheel smoothly with binding in both directions?

Jeff,

Has the electronics been removed from the engine lately?  If so, was white thermally conductive grease used on the bridge rectifier mount to dissipate the heat?

Back that screw off a bit right by the arrow, also check to see if any of the bridge rectifier connections (4) aren't touching the metal holder.

You need to take a closer look at the motors.  The starting current sounds pretty close to right, and since everything works, I'd suspect either the motors themselves or binding in the truck gears.

FWIW, I have a motor here that appears to run perfectly normal, but uses over twice the current of an identical motor with no load.  With a load it does pretty much what you describe, the power goes up a ton!

Are either of the motors getting warmer than the other?

Thanks for thE replies.  I will check it out and let you know. Thanks and I totally appreciate it!