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Old 06-24-2011, 12:32 AM   #1
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Stuck Impellers

Anyone have any advice on pulling stuck water pump impellers?* I guess maybe I'm off to try to find a puller.

*
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Old 06-24-2011, 04:10 AM   #2
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RE: Stuck Impellers

PB blaster , sure it wrecks the rubber , and a thin screw driver to slowly pass around the outside of the impeller , which may be melted in place.

Then 2 screw drivers with mucho care can usually pry it out.

Sometimes simple needle nose on the remaining rubber will do.

Do not damage the cover sealing space.
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Old 06-24-2011, 05:27 AM   #3
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RE: Stuck Impellers

If the space permits you can have someone job the engine a few degrees with the starter while you pull the impeller with vise grips. That will ususlly unstick it. Make sure*whomever is jogging the engine *keeps the stop button depressed.

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Old 06-24-2011, 07:55 AM   #4
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RE: Stuck Impellers

I recommend you buy a Jabsco impeller puller (around $45). It's quite simply the right tool for the job. Various types of levers may work, but most of the*force applied tends to be in the wrong direction and you run the risk* of damaging the corners of your pump casing (does that sound familiar?).*There are two sizes: 2-1/4" to 2-9/16"* and 3-1/16" to 5". Most of us would need the smaller.
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Old 06-25-2011, 03:23 PM   #5
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RE: Stuck Impellers

Thanks for the advice. I just bough the impeller puller - worked like a charm, Mike.
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Old 06-25-2011, 05:09 PM   #6
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RE: Stuck Impellers

Glad it worked Red. Its surprising how many "friends" just happen to drop by when word gets around that you have one of those things!
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Old 06-29-2011, 10:00 AM   #7
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RE: Stuck Impellers

I bought a speed seal kit. Sure makes changing the impeller easy.

I can't for the life of me figgure out why the impeller cover has those slot screws that always strip when you try to get them off. Even a phillips head would be better I guess they dont mak them in brass.

Speed seal addresses the issue.

SD

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Old 06-29-2011, 02:34 PM   #8
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RE: Stuck Impellers

Talking to an old well respected diesel guy a week or so ago and he says that to take out the impeller all he does is remove the cover and*bump the engine a couple of times without starting it.* The impeller will be laying in the bilge.

Anybody done it this way?
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Old 06-29-2011, 03:53 PM   #9
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RE: Stuck Impellers

Quote:
JD wrote:
.... all he does is remove the cover and*bump the engine a couple of times without starting it.* The impeller will be laying in the bilge.

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I've never heard of that but would really like to know if it actually works!
*
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Old 06-29-2011, 04:17 PM   #10
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RE: Stuck Impellers

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SeaHorse II wrote:JD wrote:
.... all he does is remove the cover and*bump the engine a couple of times without starting it.* The impeller will be laying in the bilge.

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I've never heard of that but would really like to know if it actually works.
*I figure you can't really hurt anything, even if the engine starts as long as you do a quick kill.* With no water flow the impeller blades can't go far and you were going to change it anyway.
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Old 07-26-2011, 04:51 PM   #11
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RE: Stuck Impellers

I have just finished changing the impellers on my twin Yanmars. The pump on the port engine is outboard next to the fuel tank, so access and visibility are poor. I had to use a mirror to see what I was doing - I would have made a horrible dentist!

I struggled with the tie-wrap method of compressing the vanes and came up with a plastic version of a piston ring compressor - worked like a charm and cheap too! The plastic strip/sleeve was cut from the side of a gallon ice cream container - sort of Tupperware material. The hose clamp will squeeze the sleeve/impeller sufficiently that it will just slide inside the pump barrel. Push it in 1/2" or so, push the impeller out and withdraw the sleeve. Plenty of silicone grease on the impeller and sleeve, plus Never Seize (thank you Charles) on the splines.
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Old 02-22-2013, 02:40 PM   #12
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I had to pull my stbd pump due to a water seal leak around the shaft. I found the seal kit online for about $65 but the skills required to remove the old seals and press the new seals into place exceeded my skillset. A trip to the local pump repair shop took care of that for about $90.

I had considered the SpeedSeal conversion, but at $150 for both engines, it seemed a bit expensive. Since I had the pump in hand, I headed to the local hardware store and found SS allen wrench head 8-32 screws for $0.23 a piece. I bought enough for both pumps (a whopping $3!) and installed them on the new pump with anti-corrosive grease. This should make impeller replacement much simpler than struggling with the old stbd slot and port phillips head screws.

A bead blasted pump, new coat of primer and a few coats of Ford Blue engine paint and we're ready to reinstall.

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Old 02-22-2013, 03:01 PM   #13
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Quote:
Originally Posted by JD View Post
Talking to an old well respected diesel guy a week or so ago and he says that to take out the impeller all he does is remove the cover and*bump the engine a couple of times without starting it.* The impeller will be laying in the bilge.

Anybody done it this way?
I guess this is one of those things where "your mileage may vary". I tried it when I was going through the frustration of removing the impeller from my main and this didn't do a thing. I like the look of that puller - next time it gives me trouble I'll be getting one.

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Old 02-22-2013, 03:26 PM   #14
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Nice job FlyWright, do you own a bead blaster? If so, details please.

A guy on BoatDiesel had modified his Jabsco puller to work in confined spaces - easy enough to do and worth the effort.
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Old 02-22-2013, 03:45 PM   #15
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Or this for the impeller ? :
tie wrap - Buscar con Google

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Old 02-22-2013, 05:27 PM   #16
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Changing my impellers turned out to be a tougher job than I had imagined due to the short clearance around the impeller housing plate. Here's a link to a thread on another boating website where I detailed how I installed the new impellers.

http://www.boatingabc.com/forums/ubb...tml#Post534238
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Old 02-22-2013, 05:41 PM   #17
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Only my Lehmanns works with impeller pump. My two Westerbeke runs with this type of pump:
March AC-5A-MD Magnetic Drive Pump
The best impeller-pump !
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Old 02-22-2013, 06:08 PM   #18
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Originally Posted by Shoalwaters View Post
Nice job FlyWright, do you own a bead blaster? If so, details please.

A guy on BoatDiesel had modified his Jabsco puller to work in confined spaces - easy enough to do and worth the effort.
The guys who rebuilt the pump bead blasted the housing for me at no cost. If I need a bead blaster, I have access to one in a friend's shop.

If I need to coax an impeller out, I found these tools helps me get a hold on the part. I slide them in between the blades and pull from the forward edge of the impeller. I tried a puller, but I don't have the required clearance behind the pump to use it.

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Old 02-22-2013, 06:23 PM   #19
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Al are those packing removers? Whatever they are, where'd you get them?
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Old 02-22-2013, 06:30 PM   #20
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Changing my impellers turned out to be a tougher job than I had imagined due to the short clearance around the impeller housing plate. Here's a link to a thread on another boating website where I detailed how I installed the new impellers.
Good thinking on those longer bolts Mike. Matt and I managed to change our starboard impeller and hired out the port one. Neither of us could come close to reaching it. The mechanic said it was the worst one he'd ever done.
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