[C38] Head Hatch

Wed Nov 9 16:31:42 EST 2005

Hi, everyone,

    As I told you all earlier, my hatch was sprung.  I looked for a new one, but the ones we have are no longer manufactured by Bomar.  I sought help from San Diego Marine exchange.  Jess there helped me get the right measurements, and found the closest BOMAR model.

    It is C130-STD-W   std means smoked glazing, W means white powdercoat.  It requires a 10" by 10" cutout.  I think ours is 9 3/4" x 9 3/4".  So it may drop in, or I may have to do a small amount of surgery.

    The interior trim ring is CT130-offw for off white.  

     You all may want to save this if your hatch is getting ready for replacement.  

    Kudos to Jess for his patience with me and for helping sort out all the details.

    Oh, and as to the water pump.  Brian Tansey of Mechanical Marine came over and went through the replacement with me.  He did replace the impeller, but there is no equivalent pump at this time for the M25-XPB that has the cover plate.  The replacement required removing the hoses, using a 7/16 in. wrency to remove the impeller housing from the mount, and replacing the impeller, gasket and O ring.  The whole thing took him about 1/2 hour, but I am much more mechanically challenged, so my schedule will allow 45 minutes and I will seek some extra screws, just for insurance.  

Regards,
Les H
      Les Howell
      Technical Specialist, Teradyne (retired)
      hlhowell at pacbell.net
      IM: OldETC (Yahoo)
      Professional Profile

  ----- Original Message ----- 
  From: Les Howell 
  To: Catalina 38 Listserve 
  Sent: Sunday, November 06, 2005 8:41 PM
  Subject: Re: [C38] Great help

  I have to talk about aims and hits here.  I aim for every year. I hit about 1.5 to two years, but generally my usage of the engine is pretty low, somewhere around 700 hours total since we got the boat.  This time the engine has 26 hours on it.  I have contacted my friend Brian Tansey to go through it with me.  And to see if there is another pump out there.  I just don't like the idea of opening the engine front to stray material.  Bad oil kills more engines than any other form of abuse. (except for water in diesel fuel).

      And I am getting clumsy (my wife says I just don't remember the last job I did ;-)...   So more parts off, more parts in the bilge.  My rule of thumb is if there are four parts involved I need 8, one of each to sacrifice to the great bilge god and one to get the job done. Sometimes if it is outside, the sacrifice is to Neptune.  

      I am a terrible swimming instructor, out of 100 tools I have taught, none have survived.

  Regards,
  Les H
        Les Howell
        Technical Specialist, Teradyne (retired)
        hlhowell at pacbell.net
        IM: OldETC (Yahoo)
        Professional Profile

    ----- Original Message ----- 
    From: Philip Gay 
    To: Catalina 38 Listserve 
    Sent: Sunday, November 06, 2005 11:59 AM
    Subject: Re: [C38] Great help

    Les,

    I had a Yanmar technician check out my engine a couple of years ago and he showed me how much easier it is to replace the raw water impeller if you unbolt and remove the raw water pump.  It is not necessary on my engine to disconnect any hoses.  Considering the poor access to the back side of my pump, it is the only reasonable way to service it.  Most of my trawler friends replace their raw water impellers once a year.  How often do you think is necessary?

    Phil Gay  
    C38 049 Que Linda
    Everett, WA
      ----- Original Message ----- 
      From: Les Howell 
      To: Catalina 38 Listserve 
      Sent: Saturday, November 05, 2005 11:24 PM
      Subject: [C38] Great help

      Hi, everyone,
          My head hatch lid is sprung.  Has been for some time.  Last week I was 
      going to take it off and work on it some, and broke the screw off in the 
      frame for the support.  So I want a new hatch.

          A very nice gentleman named JESS at San Diego Marine Exchange, has spent 
      literally hours helping me figure out what to use to replace it.  We now 
      have it down to two candidates from Bomar, which should fit the current hole 
      and meet my demands (which are that it fit the hole, Ha! Ha!).

          Anyway, wanted to give these guys a plug.  They are great.  I have 
      replaced my old Universal with a new M25 XPB.  The impeller is due for 
      replacement.  But the pump is a real (explective deleted) with a housing 
      that is bolted from the back, so you have to remove the hoses, remove the 
      mounting collar from the front of the engine, then remove the back screws 
      from the housing to pop it off the impeller.  Then replace the cover to the 
      cuff and rebolt it to the engine, and finally reattach the hoses (NO 
      KIDDING, this is the procedure in the manual).  A gentleman named FRED dug 
      out three differnet Oberdoffer pumps to try to find one that could be put in 
      place of this thing, but I don't have the original one off the engine yet 
      and the diagrams don't show lengths, etc.  So despite Fred's best effort we 
      couldn't replace the housing or the impeller or find a rebuild kit to fit. 
      But they suggested another shop down the street.

          Right now I will have to give San Diego Marine Exchange a real high 5. 
      So, please, if you need something, give these guys a call.  Their website 
      is: http://www.sandiegomarine.com/  And their prices are good as well.

      Regards,
      Les H
      Les Howell Technical Specialist, Teradyne (retired) hlhowell at pacbell.net 

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