74 Mercury 200 20 HP Lower Unit won't budge

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Posted by Wayne Lee ( on July 17, 2005 at 10:08:23:

I'm trying to change my Waterpump impellor on my 74 Merc 20 HP. My manual shows everything to remove, ie: anti cavitation plate to gain access to the nuts. I have all hardware loose/removed leaving the front nut on so it doesn't fall. It feels like the shaft is bound up on the splines. I can get some movement along the mating surface front and rear, can rock ever so slightly front to rear so it's not stuck on any studs etc. I tapped with a plastic/rubber mallot carefully, but of course I don't want to get too persuasive and damage something. If anybody can suggest a good approach short of dropping it off at the Marine shop, it will be greatly appreciated.
Wayne Lee

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