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seized prop, stuck on prop shaft!!!

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  • seized prop, stuck on prop shaft!!!

    over the winter i bought a 1967 Mercury 500 outboard to put on my 1966 Lonestar. i need to put new seals and gaskets into the lower unit but the prop is not coming off the shaft. I've let it soak for a few weeks in various fluids (PB blaster, Diesel, & acetone/ATF mix) and it still wont budge. I also heated the prop shaft up lightly with a propane torch.
    Any suggestions on removing it without completely destroying the prop since its an 11 spline hub?


  • #2
    you can try a puller

    however if the prop is corroded on, usually cutting it off is the only recourse.

    there is a reason its recommended to pull the prop every year and grease the splines.
    Cheesehead boating the Gulf Coast of FLA 27.51° N, 82.53° W

    1988 Cruisers Rogue 2420 -VP 290 DP now powered by custom 468 - https://forums.iboats.com/forum/owner...988-rogue-2420

    Past Boats
    1970 Wooster Hellion - Merc 9.8
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    What’s behind you doesn’t matter.Enzo Ferrari


    • #3
      First pry gently with a 2X4 between the gearcase and the prop blades. Make sure to rotate the prop and pry against all blades. If that doesn't remove it, a puller is next.

      If that doesn't work, you will need to cut the prop body off, cut and tear off the rubber hub and then cut, chistle and crack off the brass hub.


      • #4
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        When/if it gets to the chiseling part, I would drill a series of 1/8" holes along a line where you want it to crack. Not necessarily all the way through, but close. That can save a LOT of pounding....