Should have bought a 7". With the coupler in there and so on it was VERY tight getting the 4" in there to cut. I had to cut into the shaft, turn it and cut again, repeating this process 4-5 times and then I went at it with a hacksaw blade.
Got it down pretty good with that, then used all my pent up frustration with the boat to RIP it out with my bare hands! AAAARRRRRRRRR!!!!!
Pirate Pete strikes again!