so i decided to replace my impeller today and found that the impeller already in place was in perfect shape. but when i took it out, not thinking about it. i didnt really pay attention to which way it faces. how do i know which way the blades are suppose to face?
Go with Eric's comment. About a millisecond after you turn the engine over, they'll all be facing the correct way. It doesn't matter which way they are facing when you put it in. Just squish the thing in there and ignore which way the fins go.