Seawater Pump

onislandtimeonislandtime MarylandPosts: 136Member ✭✭
Hey guys, I have noticed rust water underneath the pulley of the seawater pump. I understand the bearings are shot. Do I replace just the pulley or does the seawater pump have to be replaced also?
Mercrusier 350 MPI bravo III

Comments

  • zaverin1zaverin1 Saint Clair Shores,MIPosts: 794Member ✭✭✭
    The entire housing 
    just like it would be for the engine pump
  • onislandtimeonislandtime MarylandPosts: 136Member ✭✭
    I seem not to be able to find the pulley attached to the pump. I have air fittings but Im thinking I only have to replace the front part. Am I correct or not?
  • zaverin1zaverin1 Saint Clair Shores,MIPosts: 794Member ✭✭✭
    Pulley is fine 
    housing n impeller 
  • Black_DiamondBlack_Diamond Holland, MichiganPosts: 4,017Member ✭✭✭✭✭
    Go with the Hardin Marine SS replacement pump. 

    2003 342FV "Black Diamond", 350 MAG MPI, 20P 4x4 Props, PC BYC, Holland, MI
  • LaReaLaRea Alexandria VirginiaPosts: 2,075Member ✭✭✭✭✭
    +1 Hardin Marine

    Last water pump you'll ever need.  Any questions, call them.  Their customer service is pretty good.
  • reneechris14reneechris14 Pawcatuck river CTPosts: 1,048Member ✭✭✭
    +2 harding Marine
    Yes just the front,need tool to pull pulley,and press back on.
    2005 Rinker FV342  boat name "Ten Forty"  Pawcatuck river,Ct
  • onislandtimeonislandtime MarylandPosts: 136Member ✭✭
    @LaRea I'm mechanically incline. Is this a project easily performed?
    I checked out the Hardin Marine and like what I see! Thanks
  • Black_DiamondBlack_Diamond Holland, MichiganPosts: 4,017Member ✭✭✭✭✭
    Oh yeah. Hardest part is just getting the old one out with the usual contortions required. lol. 

    2003 342FV "Black Diamond", 350 MAG MPI, 20P 4x4 Props, PC BYC, Holland, MI
  • rasburyrasbury Sanford, FLPosts: 3,737Member ✭✭✭✭
    If you can stand on your head you can do it!
  • LaReaLaRea Alexandria VirginiaPosts: 2,075Member ✭✭✭✭✭
    If you like using "the right tool for the job" ... get a set of indexing ratchet wrenches like this:

    http://www.homedepot.com/p/GearWrench-Indexing-Combination-Ratcheting-Wrench-Set-12-Piece-85488/204621316

    It will cut the job time in half compared to a straight combo wrench.
  • reneechris14reneechris14 Pawcatuck river CTPosts: 1,048Member ✭✭✭
    www.perfprotech.com/mercury-marine-parts-catalog/sea-water-pump-assembly/assembly/7585/270?model=784
    remove bolts form bracket pull pump a little forward then losing hoses.they are right under the motor mount  
    2005 Rinker FV342  boat name "Ten Forty"  Pawcatuck river,Ct
  • reneechris14reneechris14 Pawcatuck river CTPosts: 1,048Member ✭✭✭
    2005 Rinker FV342  boat name "Ten Forty"  Pawcatuck river,Ct
  • rasburyrasbury Sanford, FLPosts: 3,737Member ✭✭✭✭
    that's a pretty pump!
  • onislandtimeonislandtime MarylandPosts: 136Member ✭✭
    Its going to look good on my engine in the spring! Thanks for all the help and Hardin Marine
  • AlswaggAlswagg Posts: 1,829Member ✭✭✭✭✭
    Remember to use the proper pulley remover and installation tool. Do Not use a press.  These are special tools for this particular job.  Aka power steering pulley tool   Proper pulley alignment is cridical for long belt life 
  • rasburyrasbury Sanford, FLPosts: 3,737Member ✭✭✭✭
    Speaking of belt life...i have replaced my pump but do not have any if the fancy tools to get that belt tension to spec- same for cars for that matter...how critical is that tension and do the pro's really use those gauges? I understand to tight is a belt killer and to lose slippage...
  • AlswaggAlswagg Posts: 1,829Member ✭✭✭✭✭
    Yes use a tension gauge 
  • AlswaggAlswagg Posts: 1,829Member ✭✭✭✭✭
    Simple devise I have had one for years 
  • rasburyrasbury Sanford, FLPosts: 3,737Member ✭✭✭✭
    Then I will invest- would hate to call sea tow for such a simple problem...I blew mine out when a water pump seized and I actually put an auto one on there on the water but did not realize the pump had seized until I put the belt on- it has held up but probably should get the merc one and put on it or at least have it on the boat. Thanks Al.
  • Dream_InnDream_Inn Annapolis, MDPosts: 3,885Member, Moderator mod
    Ras, a spare belt is also a good thing to have.  But I agree, tension gauge is a good thing.  Mine has a spring type tensioner that is supposed to automatically keep the correct tension on it.

    Dream 'Inn III -- 2008 400 Express

  • rasburyrasbury Sanford, FLPosts: 3,737Member ✭✭✭✭
    now that I think about it, mine does too.....? 350 MPI horizon....it was a while ago...
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