All good points.. but one more little thing. Rotate the prop backwards by hand until it reaches the reverse compression stroke. Not all the way through, just to the beginning of resistance from compression. Then give it the running start approach. This gives the prop a tad bit of momentum needed to get past the first compression stroke and it will start just fine. I have the 46 SF, 50 SF, 75 AX, and 1.20 AX and use the same starter and it works just fine if I use all of the above approachs.