"Remove the prop nut and space
"Remove the prop nut and spacer. On the face of the propeller hub you will see a row of numbers, something (but not exactly) like 13-1/4x17.
The first number (above 13-1/4) will be the diameter of the propeller. The second number (above 17) will be the distance the prop would travel thru the water in one revolution "IF" no slippage existed."
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