"Looking at the prop with it f
"Looking at the prop with it fixed to the motor, if it will push water while rotating clockwise it's right handed.
Right handed is considered "normal" - a left hand prop would normally be fitted to a "counter rotating" set-up, such as used in a dual motor rigging. The counter rotating prop helps balance out the torque between the two motors - if both were "normal" rotation, the boat would pull significantly to one side.
However, some small horsepower motors (those mostly without neutral or reverse gears - or "in" gear all the time) have a left hand prop.
That's because in an outboard set-up "reverse" (or counter-clockwise) is the natural rotation of the prop shaft. The driveshaft turns clockwise and if only one gear is present on the propshaft it will turned counter-clockwise.
On outboards that have forward, neutral and reverse, engaging the "forward" gear causes the propshaft to also spin in a clockwise direction, so it will use a right hand prop.
Hope I didn't confuse you more
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