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Discussion Starter #1
So the last time I changed the water impeller it took some work, but it came off.
Not so this time. Would not budge. And now all the vanes are torn off and I'm left w/ the damn hub stuck on and no way to run the engine to boot!

Even thought about shelling out big bucks for a fancy impeller puller, but Noooo, the one at the local Marine store was for big impellers. Mine is 1 9/16".

Any ideas?
 

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Barquito
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I find that the correct swear word incantation works. The trick is finding the right words in the right order: Usually G*d d#mb [email protected]*r f^(king sum bee-atch does the trick. If not then I reach for PB Blaster and a bigger tool.
 

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Master Mariner
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8,957 Posts
Unfortunately, what you are getting into here is the possibility that you have or will destroy the seal in the process of removing the impeller hub. Removing the pump and getting it in a vice or at least on a bench, will probably help. Soaking the pump in diesel for a few days or longer might help, if the Blaster isn't doing the job. You may have to completely disassemble the pump and get the shaft out to fix this, At any rate, it's probably going to take vice grips and a hammer, which will surely destroy the seal.
Look around for a used pump that you can keep around (after rebuilding) to use for a quick change out, if an impeller goes.
Next time, lube the shaft with Never Seeze and you won't have this problem again.
 
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This happened to me just 3 days ago. Sailing to Subic Bay in the Philippines I overnighted in a little backwater and left the next day overheating. It was time to replace the impellor but could not get it out and only, like you, had the hub. I got a vice grip on it perpendicular to it and could not wiggle it off. Placed a large (1 1/2 foot) screwdriver through the hole between the impellor and the jaws then something on the waterpump to keep the tip from scratching and levered it right off. Had to return again to pick pieces of rubber out of heat exchanger.
:) good luck
 

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Dremel tool, cut a grove in it and pop it with a small hammer and chisel. Butane torch would do the trick also but might catch your boat on fire when the rubber takes off, so ignore the last idea. Defiantly put antisieze on it when you go back with the new one.
 

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Dremel tool, cut a grove in it and pop it with a small hammer and chisel. Butane torch would do the trick also but might catch your boat on fire when the rubber takes off, so ignore the last idea. Defiantly put antisieze on it when you go back with the new one.
I agree if you can cut a grove in it to the shaft. Just like removing stubborn berring races on a trailer.
 

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Another aproach

put two rags on the edge of the impeller housing so you don't damage the edge. Jam two larger flat head screwdrivers, opposite each other into the impeller barrel based (as close as you can) at an angle and against the rags. At the same time, push down of the screwdrivers to pry off the impeller. I couldn't pull mine off by the other methods, but this method popped it right off.
 
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