Am finally getting around to replacing the wear ring on my Islandia as it has warmed up and I have an itch to get the boat prepped for spring. I have the merc special socket and was able to get the impeller nut off without a problem. I can't get the impeller to slide off the shaft, as it seems the splines on both the impeller and shaft are rusty and have fused the two together. I have tried wd-40/penetrating oil to no avail. Any suggestions? Thanks in advance for the help.