303345 prop shaft SKF equivalent

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  • May 2, 2023 at 10:24 am #275805
    JohnRude
    Participant

      Canada Member

      Question:

      Mr. Crosbyman. I’m working on a 58 10hp. How did those 5605 seals work out. Did the thinner .250 make a difference?

      May 2, 2023 at 10:29 am #275806
      crosbyman
      Participant

        Canada Member

        seemed ok  on the prop shaft  I installed 2 . one in each direction.  Outside one facing in and pushed in with a  socket and  hammer   and it did the job,

        on all these  SKF seals  I double coated them with  a latex type glue to help reduce rusting. expecially the outside one where  I brushed on  a third coating.

        the drive shaft  seal used the same size  if I recall….

        tested GC psi at 15           vacum was ok to 🙂

        my worst  reassembly headache  was  fixing the shock absorber  back to 6”- 11/16th ….welded it .

         

        Joining AOMCI has priviledges 🙂

        May 2, 2023 at 7:36 pm #275816
        labrador-guy
        Participant

          US Member

          Guys those SKF seals are stainless steel.   They are made with metal similar to the moldings that used to be on the sides and wheel wells of some cars.  Rusting should not be a problem.   I have pulled original OMC 303345 seals out and the backside was rusted.  As to weather they will hold up good I don’t know.

          dale

          May 2, 2023 at 10:20 pm #275823
          JohnRude
          Participant

            Canada Member

            Not sure what motor you are working on but my shock aborber on an AD 11 was in pieces when I dropped the lower end to fix the shift handle. I found one from a 1955 7.5 Evinrude. Seemed to match up so I dropped it in. Haven’t run the motor yet. Waiting on rubber pluggy things for the leaf plate (ha hem) and leaf plate gaskets from a club friend but it sounds OK on turn over.

            May 2, 2023 at 10:26 pm #275825
            JohnRude
            Participant

              Canada Member

              Did you force them in together or one at a time? Looking at the dynamics of the thing, I would imagine them going in together.

              At least we have seals to choose from for the QD19. I’m also working on a 55 10hp. Can’t find 302495 or 41-62. Sierra doesn’t list them at all.

              Is anyone aware of a cross reference chart for Sierra to OEM?

              JR

              May 3, 2023 at 7:38 am #275832
              crosbyman
              Participant

                Canada Member

                seems you should be able to reassemble your shock absorber parts being all metal…. and just weld it  at the prescribed  lenght just where the top fits over the lower section.

                to make it 6-11/16 I just wacked  it with a wooden hammer…. a  piece 2×4 should work to 🙂  and it won’t mar the end

                 

                the important  aspect is for it not to rub  on the lower pump housing plate.

                Your  flapper  was mailed out Sunday.. it is up to Canada Post now but I see your location is not on the main routes  !  should get to you this week….

                Joining AOMCI has priviledges 🙂

                May 3, 2023 at 11:04 am #275842
                green-thumbs
                Participant

                  US Member - 2 Years

                  OEM chooses STANDARD seals and bearings as they are the least expensive. There are applications where an upgrade to a SPECIL seal r bearing are required and the EXTRA cost is justified. Anyone repairing old machinery should have a seal catalog and a bearing catalog for reference. Mine were free as they were prior year versions. Online cross reference will give the  standard seal number. Catalog will give more choices that might be better… such as a thinner or thicker seal to alter location lip meets shaft,  Extra features … stainless steel shells, springs and lip material options are always extra cost . but, sometimes worth consideration. Look up seals by shaft diameter, then seal diameter and then thickness. Catalog contains lots of things you do not need to know, but, finding the things you need to know is quick and easy.

                  Louis Doering

                   

                   

                   

                   

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                  May 3, 2023 at 11:25 am #275843
                  Steve D
                  Participant

                    “I’m also working on a 55 10hp. Can’t find 302495 or 41-62.”

                    This is what I have:

                    Driveshaft – The 41-62 or 41A62 seal was 307563 and now is 0321788 or Sierra/NAPA #18-2032 or SKF 4985

                    Prop shaft – OMC #302495, CR or SKF 6280, NAPA # NOS 6280, or National 471264. OD is 1.254″ shaft is .625″ width is .313

                    There are some of those on ebay if you do a search. If you have to pay $30 for a seal you might think about getting the whole kit. While I don’t think there is a kit that comes with the 302495 seal, certain vendors will make up a kit for you with it for maybe slightly more than the $30. Some of the names I think I’ve seen mentioned are vintageoutboard.com, Laing’s, among others.

                     

                    May 3, 2023 at 4:37 pm #275847
                    labrador-guy
                    Participant

                      US Member

                      Maybe this chart will help.  I knew I had it someplace!  Stupid thing won’t load!

                      dale

                       

                      May 3, 2023 at 6:33 pm #275850
                      Steve D
                      Participant

                        Dale, Wondering if this is the one that won’t load for you? I forgot I had it until I saw your post.

                        OMC-Seals-chart

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