You could not tell because a circle is round.
get a book Run your spark plug wire from the #1 plug to the #1 lug on the distributor cap. Then follow the rest of the firing order going clockwise around the cap.
1.When your index finger is longer than your right finger.2. (ONLY IF YOUR SPIRAL THAT IS ON YOUR LEFT OF THE HEAD) WHEN your spiral direction is going the counter clockwise you are gay, when it is going the way of clockwise you are not gay.
Stand directly under the fan and observe the direction the blades are moving. If the fan blades are moving in a clockwise direction, the fan is set to winter mode (clockwise rotation). If they are moving counter-clockwise, it's set to summer mode (counter-clockwise rotation).
they are going to look at you with a eyes then you are going to know
Look on the part number sticker.
Casting no on the block & then look it up.
Find the tower with the #1 spark plug wire. Going clockwise from here, the firing order is 18436572.
A way to tell is by the sound the motor makes. If it is winding slowly with no force it could be going out. If it skips or whines without action it is out.
The horsepower of the motor is based on the efficiency curve of the pump it is to drive. The higher the head pressure of the pump the more HP it is going to require to drive it. Look up the pump model on line and look for its characteristics curve. there it should tell you the HP you will need for a specific flow.
look at the serial numbers on the side of the block and get a decoding book.
To see if the motor is three phase or single phase look at the motor's nameplate. There it will tell you what the voltage needs to be and what system phase the motor needs to be connected to operate properly.