Hardin Marine stainless steel replacement for Merc seawater pump

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  • Dream_InnDream_Inn Member, Moderator Posts: 7,924 mod
    Well, for all you saying the OEM is great, the reason I switched over is because I had the bearing go bad from leaking seals on my OEMs.  I've had this happen with 3 of them across 2 different boats.  They did have quite a few hours on them, but, I do know most of you are getting close to that time with your OEM (I wouldn't brag too much :smile: ).  I saw two OEMs go on my dock just this summer.  & when you try to buy a new OEM, watch out for that price (BOAT). 

    Dream 'Inn III -- 2008 400 Express

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  • LaReaLaRea Member, Moderator Posts: 8,066 mod
    When I switched to the Hardin pump 8 years ago, it was the only pump for my engines that had replaceable wear plates.  
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  • YYZRCYYZRC Member Posts: 5,419 ✭✭✭✭✭
    @LaRea did you have a pump or impeller failure due to scoring?
    2006 390 EC
    2008 350 EC
    Georgian Bay
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  • LaReaLaRea Member, Moderator Posts: 8,066 mod
    Yes.  The OEM pump body didn't look bad, but it wouldn't pump enough water to cool the engine.  That's why I switched to Hardin (plus they were cheaper than OEM).  
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  • Aqua_AuraAqua_Aura Member Posts: 2,702 ✭✭✭✭✭
    Alswagg said:
    A much better designed pump is a “Johnson” brand crank driven pump.   Very very similar to what Volvo uses but better 
    I was gonna make a similar comment. Is it not simple enough to put this type of pump on a Merc?
    1997 Bayliner 3988
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  • YYZRCYYZRC Member Posts: 5,419 ✭✭✭✭✭
    Alswagg said:
    A much better designed pump is a “Johnson” brand crank driven pump.   Very very similar to what Volvo uses but better 
    Are you now using these pumps instead of Hardin, @Alswagg ?
    2006 390 EC
    2008 350 EC
    Georgian Bay
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  • J3ffJ3ff Member Posts: 4,224 ✭✭✭✭✭
    edited September 2021
    Wish I had paid more attention, just had my raw water pump replaced...with another OEM one. Dam. 
    Post edited by raybo3 on
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  • aero3113aero3113 Member Posts: 9,774 ✭✭✭✭✭
    I’ll post pics when I open it up also.


    2008 330EC
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  • aero3113aero3113 Member Posts: 9,774 ✭✭✭✭✭
    The impeller still looks like new. Some scoring on the outer wear plate, not too bad. I can see a little on the inner wear plate also.



    2008 330EC
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  • aero3113aero3113 Member Posts: 9,774 ✭✭✭✭✭
    I shipped it out this morning for overnight delivery. They should have it before 6PM tomorrow. Hopefully they do a quick turn around…..
    2008 330EC
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  • LaReaLaRea Member, Moderator Posts: 8,066 mod
    @aero3113 those wear plates have enough wear to start losing efficiency.  I replaced my port impeller this weekend because the engine was running hot.  It looked not much worse than yours.
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  • LaReaLaRea Member, Moderator Posts: 8,066 mod
    Cool trick for replacing impellers:  

    Sometimes, the inner wear plate falls out easily, but sometimes it refuses to come out.  You can tap the pump with a mallet or 2x4 a million times, and the plate won't shake loose. 

    Here's the trick:  Dry the wear plate with a paper towel.  Stick a little blob of butyl tape onto it.  Pull the butyl tape, and the plate will pull right out.  
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  • aero3113aero3113 Member Posts: 9,774 ✭✭✭✭✭
    @LaRea , I have a new impeller and plates to install when it comes back. But I’m curious if they will be generous to send me new when it returns.
    2008 330EC
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  • aero3113aero3113 Member Posts: 9,774 ✭✭✭✭✭
    Good tip @LaRea , I’ll try that if I have trouble.
    2008 330EC
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  • aero3113aero3113 Member Posts: 9,774 ✭✭✭✭✭

    2008 330EC
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  • YYZRCYYZRC Member Posts: 5,419 ✭✭✭✭✭
    Clock is ticking!!
    2006 390 EC
    2008 350 EC
    Georgian Bay
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  • aero3113aero3113 Member Posts: 9,774 ✭✭✭✭✭
    YYZRC said:
    Clock is ticking!!
    That’s what I said to myself! 😂
    2008 330EC
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  • Dream_InnDream_Inn Member, Moderator Posts: 7,924 mod
    Well, did they send new plates and impeller??  Come on, we are all waiting! :smile:

    Dream 'Inn III -- 2008 400 Express

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  • aero3113aero3113 Member Posts: 9,774 ✭✭✭✭✭
    edited September 2021
    They just received it today @Dream_Inn !! Give them a little bit of slack 😂.
    2008 330EC
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  • YYZRCYYZRC Member Posts: 5,419 ✭✭✭✭✭
    …. Update?!
    2006 390 EC
    2008 350 EC
    Georgian Bay
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  • aero3113aero3113 Member Posts: 9,774 ✭✭✭✭✭
    I haven’t heard anything from them yet. I left a note in the box with my phone number and email address.
    2008 330EC
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  • YYZRCYYZRC Member Posts: 5,419 ✭✭✭✭✭
    Sorry. The board is so slow! I had to ask. 
    2006 390 EC
    2008 350 EC
    Georgian Bay
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  • Aqua_AuraAqua_Aura Member Posts: 2,702 ✭✭✭✭✭
    Yes things are slow on here lately. Getting close to the end of boating season for most. Now we will get the how to winterize questions and some outdrive maintenance questions/below the waterline maintenance. 
    1997 Bayliner 3988
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  • aero3113aero3113 Member Posts: 9,774 ✭✭✭✭✭
    YYZRC said:
    Sorry. The board is so slow! I had to ask. 
    LoL
    I was thinking that also.
    2008 330EC
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  • raybo3raybo3 Administrator Posts: 5,614 admin
    Trust me the break is nice....lol The forum also gets slow around this time of the season. 
    2002 342 Fiesta Vee PC Point Of Pines YC Revere MA. popyc.org     raybo3@live.com
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  • aero3113aero3113 Member Posts: 9,774 ✭✭✭✭✭
    Pump was rebuilt and sent out today, full rebuild with impeller 👍🏻.
    They weren’t as quick as I was hoping, they received it last Wednesday around 1:00. I was told they would work it as soon as they received it. I called yesterday and they said it’s on the bench being worked. It was shipped out today. If there are no leaks when it goes in, I’ll be happy!


    2008 330EC
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  • YYZRCYYZRC Member Posts: 5,419 ✭✭✭✭✭
    Update @aero3113 ? Sure hope you are boating this weekend!
    2006 390 EC
    2008 350 EC
    Georgian Bay
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  • aero3113aero3113 Member Posts: 9,774 ✭✭✭✭✭
    @YYZRC I Installed the pump today and no leaks. Of course my wife and the girls are sick! So not a boating weekend for us. This is the extent of my boating today! Just to test out the pump, and it’s beautiful out!!’😢.



     I was up in the air about leaving the pulley on when I sent it out, I decided to leave it on. When I received the pump there were two dents on the pulley. Not an issue but **** me off to see it come back like that.



    2008 330EC
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  • YYZRCYYZRC Member Posts: 5,419 ✭✭✭✭✭
    Glad you're back in business!
    2006 390 EC
    2008 350 EC
    Georgian Bay
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  • Pat310Pat310 Member Posts: 604 ✭✭✭
    @aero3113. I was at Jones Beach today and was pretty rough. Hope the ladies feel better
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