I have a thunderbird 18 amp controller, it has three wires, red, black and white.

The engine (don't know the brand, came with a package), has three wires, Red, Black and yellow.

Question, is the yellow - White in this instance? I assume red to red, black to black, and remaining two are white to yellow.

Oh for a standard.....must have been bargain on yellow wires that month.....

Thanks,
Chris

Hi, I've just replied to your question in the other section you posted it in.

Any coloured wire to any coloured wire works on a brushless motor.
swap any 2 wires to reverse the direction if you need to.