496 raw water pump problems
06-01-2011 | 11:01 AM
#12
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Joined: Jan 2004
Posts: 2,777
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From: San Diego, California
Hardin:
Your new Mercruiser late model stainless steel water pump looks like a nice piece and a welcomed addition to the mercruiser grooved bronze pump. I just have a couple of questions, does it have a plate insert or new rear cover as the grooving that occurs on the stock brass plate is one of the pressure and pumping losses that occurs on the stock pump. Is this pump configured to bolt directly back into the stock mercruiser bracket and accept the stock pulley, I assume it is but just clarifying. Good Job on a needed new product!
Best Regards,
Ray @ Raylar
Your new Mercruiser late model stainless steel water pump looks like a nice piece and a welcomed addition to the mercruiser grooved bronze pump. I just have a couple of questions, does it have a plate insert or new rear cover as the grooving that occurs on the stock brass plate is one of the pressure and pumping losses that occurs on the stock pump. Is this pump configured to bolt directly back into the stock mercruiser bracket and accept the stock pulley, I assume it is but just clarifying. Good Job on a needed new product!
Best Regards,
Ray @ Raylar
06-01-2011 | 11:21 AM
#13
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Joined: Nov 2004
Posts: 266
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From: Palm Coast, FL
Hardin:
Your new Mercruiser late model stainless steel water pump looks like a nice piece and a welcomed addition to the mercruiser grooved bronze pump. I just have a couple of questions, does it have a plate insert or new rear cover as the grooving that occurs on the stock brass plate is one of the pressure and pumping losses that occurs on the stock pump. Is this pump configured to bolt directly back into the stock mercruiser bracket and accept the stock pulley, I assume it is but just clarifying. Good Job on a needed new product!
Best Regards,
Ray @ Raylar
Your new Mercruiser late model stainless steel water pump looks like a nice piece and a welcomed addition to the mercruiser grooved bronze pump. I just have a couple of questions, does it have a plate insert or new rear cover as the grooving that occurs on the stock brass plate is one of the pressure and pumping losses that occurs on the stock pump. Is this pump configured to bolt directly back into the stock mercruiser bracket and accept the stock pulley, I assume it is but just clarifying. Good Job on a needed new product!
Best Regards,
Ray @ Raylar
The pump uses an internal wear plate as well as a wear plate between the rear housing and cover so basically on each side of the impeller. All of these dimensions were factored into the design of the pump so that the original bracketry will work. It comes with the gasket for re-assembly to the OEM rear cover
Thanks on the accolades it really is a great pump I think you will hear a lot more positive press.
Sincerely
06-01-2011 | 11:38 AM
#14
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Joined: Nov 2004
Posts: 266
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From: Palm Coast, FL
If your pump requires the re-use of the original rear housing how does that address the potential scoring on that side? It would seem that your pump only addresses half (roughly) of the problem of the scored pumps.
My OEM pump had scoring in the main housing and the back plate. And the shim kits cover both sides.
Am I missing something?
My OEM pump had scoring in the main housing and the back plate. And the shim kits cover both sides.
Am I missing something?
Nothing is wrong with the repair kits sold. If you know EXACTLY what your wear tolerances are and or can machine all of your bronze parts to those spec's and then again modify your mounting bracket they will work fine as well.
06-01-2011 | 04:04 PM
#15
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Joined: Jan 2005
Posts: 965
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From: Mass
Excellent clarification!
OK, so I was one of those pathetic sheep following the herd, and I just plunked in the new wear plates, new impeller, gaskets and machined down my bracket so it would all fit. I did nothing in terms of figuring out what my actual wear tolerances were. To me, it seemed that the new impeller is now riding against two new smooth ends and more or less fixed the pumping problem caused by the soft brass wear and tear.
What exactly are the "real world" experiences when just doing what I did? Will the impeller wear be in question because of the housing variances? To me, I covered over grooves in the housing and back plate that were creating the seal problem. Those grooves I would imagine would have to be measured with a micrometer. Are tolerances really that small in these pumps?
Raylar Ray, you need to set up a "tech corner" on your website. Seems like with all the traffic you get with 496 questions you could easily start one that would help increase traffic to you product web site! Cover all the common issues, like Pumps, Headers, air filters versus stock spark arrester, common part #'s to name a few!
I bet once you did if anyone should ever Google "496" your site would be top hit!!!
Just a thought!
OK, so I was one of those pathetic sheep following the herd, and I just plunked in the new wear plates, new impeller, gaskets and machined down my bracket so it would all fit. I did nothing in terms of figuring out what my actual wear tolerances were. To me, it seemed that the new impeller is now riding against two new smooth ends and more or less fixed the pumping problem caused by the soft brass wear and tear.
What exactly are the "real world" experiences when just doing what I did? Will the impeller wear be in question because of the housing variances? To me, I covered over grooves in the housing and back plate that were creating the seal problem. Those grooves I would imagine would have to be measured with a micrometer. Are tolerances really that small in these pumps?
Raylar Ray, you need to set up a "tech corner" on your website. Seems like with all the traffic you get with 496 questions you could easily start one that would help increase traffic to you product web site! Cover all the common issues, like Pumps, Headers, air filters versus stock spark arrester, common part #'s to name a few!
I bet once you did if anyone should ever Google "496" your site would be top hit!!!
Just a thought!
06-04-2011 | 03:18 PM
#16
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Joined: Jan 2009
Posts: 79
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Hardin Marine Impeller Housing-Kit
Just got my new stainless steel kit referenced above and it went in PERFECTLY!!!!!!!!!!!! No mods, no drilling, swapped pulleys over in minutes with a puller and press, dumps a TON of water!!!!! No rebuild kits for me !
06-10-2011 | 12:25 AM
#18
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Joined: Apr 2001
Posts: 55
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From: West Los Angeles, CA
Hardin:
Is the pump available with a pulley installed? It is a pain to R&R the pulley, so I would like to purchase the stainless version with it attached and keep the original as a back-up.
Also, the companion end plate, is it threaded for hose fitting requiring additional purchases?
Is the pump available with a pulley installed? It is a pain to R&R the pulley, so I would like to purchase the stainless version with it attached and keep the original as a back-up.
Also, the companion end plate, is it threaded for hose fitting requiring additional purchases?
06-10-2011 | 05:51 AM
#19
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Joined: Nov 2010
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So from what your saying it appears your new pump will back fit all the way back to the old style Mercruiser two piece plastic body style impeller housing that used the two stainless steel ware plates and related gaskets? Also it appears it will fit in place of the newer one piece plastic body housing Mercruiser came out with in 1996? Correct? Also it appears your new pump will fit in place of the newer brass style housing all this while using the old style Rubber impeller, Mercruiser part number 47-59362T1.
Also just so that it's clear, the rubber impeller that fits inside the newer brass style Mercruiser housing, Mercruiser part number 47-862232A2 will not fit inside your new pump housing. Correct?
http://www.mercruiserparts.com/bulle...1996/EN_08.PDF
I just wanted to say, If so Good Job, even if it will not fit all three, still you guys did a good job with the new housing. congratulations
As I'm sure all those other repair kits with the stainless steel ware plates are going to work good. I'm going to venture to say i wonder how long they are going to last. I say that because if everyone would think back to the two piece impeller body housing Mercruiser first started using, (See service bulletin Above) We have already went through the real world experience with using stainless steel ware plates.The plates didn't last all that long themselves.
Just about everytime a new impeller was needed it was time to change the stainless steel ware plates due to deep grooves/gouges from either sand or the impeller itself. obviously Mercruise knew of it back then, They sold an impeller kit that came with the stainless steel ware plates that needed to be changed out as well about every 100 hours or so of use.
I am a little curious though, would you be able to elaborate yet on how much testing you have done and how your new pump appears to be holding up thus far? If not, I'll understand.
Thanks.
As a better selling feature you should consider doing/posting a complete step by step write up on all the boating forums you participate in on how to install your new style impeller pump housing from start to finish while working inside a boat with detailed photos attached. Also you should consider doing a youtube video to help demonstrate the actual key points of the demonstration, Then post the link with the write up on the forums. This same write up idea would be good for all the boating Magazines that are still left out there as well.
Your new pump housing goes past just the High performance crowd, You will have the sea rays, Bayliners, cobalt style boats wanting in on the action as well. I hope it goes well for you, Good luck with it.
Also just so that it's clear, the rubber impeller that fits inside the newer brass style Mercruiser housing, Mercruiser part number 47-862232A2 will not fit inside your new pump housing. Correct?
http://www.mercruiserparts.com/bulle...1996/EN_08.PDF
I just wanted to say, If so Good Job, even if it will not fit all three, still you guys did a good job with the new housing. congratulations
Our pump accepts any of the seven different back housings they bolt to our unit just like the factory unit. So to answer your questions you retain that part from your original assembly.
I also had someone call today questions the mounting positions. Our pumps were designed from a clean slate so that when the wear plates were incorporated the mounting positions would be in there original location. We also chose to use the common mercury impeller that has been in every pump for the last 20 years. The original impellers use a larger stronger shaft. But the main reason was if you were in the middle of no where and needed a impeller you more than likely could find it since it is so common as the 496 impeller is tough to find in many places. Other than that it's just better materials and the incorporated wear plates that allow the pump to have a much longer service life.
Happy Boating
I also had someone call today questions the mounting positions. Our pumps were designed from a clean slate so that when the wear plates were incorporated the mounting positions would be in there original location. We also chose to use the common mercury impeller that has been in every pump for the last 20 years. The original impellers use a larger stronger shaft. But the main reason was if you were in the middle of no where and needed a impeller you more than likely could find it since it is so common as the 496 impeller is tough to find in many places. Other than that it's just better materials and the incorporated wear plates that allow the pump to have a much longer service life.
Happy Boating
Just about everytime a new impeller was needed it was time to change the stainless steel ware plates due to deep grooves/gouges from either sand or the impeller itself. obviously Mercruise knew of it back then, They sold an impeller kit that came with the stainless steel ware plates that needed to be changed out as well about every 100 hours or so of use.
I think you should investigate the repair kits in depth and ask the dealers that have installed them for some real world reviews.The whole reason we designed our new pump was we heard endless complaints about the fact that due to varying pump wear these plates could not always bring the pump back to its original performance. They would work initially just to fail prematurely.
But if your wear is in excess of the new plates then you cannot get the pump back to a OEM spec. I'm not saying the kits are bad it's just that providing two wear plates and an impeller for a pump with unknown wear will never fix all applications. Impeller crush or end clearance is what determines how well your pump performs.
But if your wear is in excess of the new plates then you cannot get the pump back to a OEM spec. I'm not saying the kits are bad it's just that providing two wear plates and an impeller for a pump with unknown wear will never fix all applications. Impeller crush or end clearance is what determines how well your pump performs.
Thanks. Maybe your not missing anything I probably wasn't clear. The pump uses a stainless steel wear plate between the body and the rear cover as well as the front housing. The impeller rides against all fresh smooth surface's. and the impeller has factory OEM load spec's. This merely a new pump with wear plates designed into it from the beginning and manufactured from stainless steel.
Your new pump housing goes past just the High performance crowd, You will have the sea rays, Bayliners, cobalt style boats wanting in on the action as well.
I hope it goes well for you, Good luck with it.
06-10-2011 | 02:42 PM
#20
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Joined: Sep 2008
Posts: 916
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From: Tampa Bay Area Florida/ North Miami Florida
As a better selling feature you should consider doing/posting a complete step by step write up on all the boating forums you participate in on how to install your new style impeller pump housing from start to finish while working inside a boat with detailed photos attached. Also you should consider doing a youtube video to help demonstrate the actual key points of the demonstration, Then post the link with the write up on the forums. This same write up idea would be good for all the boating Magazines that are still left out there as well.
Your new pump housing goes past just the High performance crowd, You will have the sea rays, Bayliners, cobalt style boats wanting in on the action as well. I hope it goes well for you, Good luck with it.
This would be an awesome episode of ship shape TV. Instead of the latest and greatest mold cleaner how about the latest and greatest water pump that will stop mercury from mugging us every time we need to service a water pump
Chris
Your new pump housing goes past just the High performance crowd, You will have the sea rays, Bayliners, cobalt style boats wanting in on the action as well. I hope it goes well for you, Good luck with it.
This would be an awesome episode of ship shape TV. Instead of the latest and greatest mold cleaner how about the latest and greatest water pump that will stop mercury from mugging us every time we need to service a water pump
Chris
