Early 1957 Evinrude 18 Prop Seals

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  • January 11, 2023 at 10:34 am #271024
    JohnRude
    Participant

      Canada Member

      New guy needing help. I’m attempting my first 18 hp overhaul. Great motor. Magneto and carb are done. New gear oil. Starts and runs well BUT…no water coming out. Took the lower unit off. Only white sludge and mud came out. The prop seal literally fell out. BRP says seal 302495 is discontinued and there is no sub. Can’t find one at Sierra.
      Someone here a few years ago, Chris, had some made but so far no response from him. Would a gear head housing from a 57 Johnson or later 57 Evinrude with the smaller 1 1/8 OD bearing fit. The skeg castings look the same but have different numbers. This motor is mint in most respects. I don’t want to abandon it because of a $20 seal.

      January 11, 2023 at 10:41 am #271025
      seakaye12
      Participant

        US Member

        You should verify dimensions but I show in my notes that a National # 471264  or a SKF/Timkin #6280 would work.

        Either or both of those may not be Stainless Steel so they would not be as long lasting (especially in salt water) as the SS variety.

        January 11, 2023 at 11:06 am #271028
        crosbyman
        Participant

          Canada Member - 2 Years

          I installed some SKF on one oldy few years ago…..  before installing I coated the exposed portion facing outward  with 2-3 coats of  latex  glue which  when dry  gave it a  good waterproof   rubbery  surface to face the elements (water)

          Did this as a trial  and pretty confident the non stainless  steel  will last much longer .   I presume  the same  “minimum protection”  could be obtained  with  any product  like epoxy to coat the outside surface of the seal  after the seal is installed.   The inside surfaces will soak in oil so no worries on that side of the seal  🙂

          I can’t vouch  for longetivity because I sold the engine.

          Joining AOMCI has priviledges 🙂

          January 11, 2023 at 11:33 am #271034
          frankr
          Participant

            US Member
            JohnRude wrote:

            New guy needing help. I’m attempting my first 18 hp overhaul. Great motor. Magneto and carb are done. New gear oil. Starts and runs well BUT…no water coming out. Took the lower unit off. Only white sludge and mud came out. The prop seal literally fell out. BRP says seal 302495 is discontinued and there is no sub. Can’t find one at Sierra.
            Someone here a few years ago, Chris, had some made but so far no response from him. Would a gear head housing from a 57 Johnson or later 57 Evinrude with the smaller 1 1/8 OD bearing fit. The skeg castings look the same but have different numbers. This motor is mint in most respects. I don’t want to abandon it because of a $20 seal.

            Yes, the newer gearcase head & seal will work.

            January 11, 2023 at 2:23 pm #271039
            Steve D
            Participant

              Another option that some have used is a spacer allowing you to use the more readily available smaller seal 313284 in the earlier larger gearcase head. A member made them a few years back, not sure if he still does.

              https://www.aomci.org/forums/topic/qd-16-prop-shaft-seal/

              prop-head-reducer-spacer-ring-302495-to-313284
              302495-313284-Seal-and-Adapter-Ring

               

              January 11, 2023 at 6:14 pm #271057
              fisherman6
              Participant

                US Member - 2 Years
                Steve D wrote:

                Another option that some have used is a spacer allowing you to use the more readily available smaller seal 313284 in the earlier larger gearcase head. A member made them a few years back, not sure if he still does.

                https://www.aomci.org/forums/topic/qd-16-prop-shaft-seal/

                prop-head-reducer-spacer-ring-302495-to-313284
                302495-313284-Seal-and-Adapter-Ring

                 

                I made some of those reducer bushings a few years ago.  I still have some.  DM me if you’re interested. I’ll try to keep an eye on my messages on this board.

                -Ben

                OldJohnnyRude on YouTube

                • This reply was modified 1 year, 10 months ago by fisherman6.
                January 11, 2023 at 6:18 pm #271059
                JohnRude
                Participant

                  Canada Member

                  Thanks to all for the quick answers. Went to my local Canada Bearings and showed him the seal. The last install was a Chicago Rawhide seal which they carry. Also Timken and SKF. At least it gets the motor back onto the water.
                  These seals do come with a magic synthetic coating to protect them but Crosbyman (again) is correct. The company also suggested coating the exterior end with epoxy or Teflon or some sticky protector. The seal I took out was a CR seal and showed no signs of rust at least from the outside. And, anybody with extra parts lying around could just look for a later model and use that bearing housing with 1 1/8 common seal as frankr confirmed.
                  Brilliant. Thanks again.
                  BTW A seal is $14.00 CDN including shipping.

                  January 11, 2023 at 7:42 pm #271063
                  crosbyman
                  Participant

                    Canada Member - 2 Years

                    Johnrude…. with all the crows I have eaten I have no claim to fame !

                    Joining AOMCI has priviledges 🙂

                    • This reply was modified 1 year, 10 months ago by crosbyman.
                    January 11, 2023 at 10:01 pm #271065
                    JohnRude
                    Participant

                      Canada Member

                      Crows always seem to get a bad rap. Processers of carrion, smart, family centric, great memory, likes shiny things. What’s up with that?

                      January 12, 2023 at 12:05 am #271067
                      crosbyman
                      Participant

                        Canada Member - 2 Years

                        Every time I erred  in my “outboard” comments crow was served to me 🙂

                        BTW as an adolescent I raised 2 crows at the  summer cottage .  They would come at the blow of  a wistle land on my head or shoulders.

                        Neighbours did not  like their high dives and swoops very much… especially the ladies

                        Yes they stole shiny  stuff… nickels dimes  anything shiny

                        One day after a 2 day trip to the city… when I returned to  rejoin my 2 friends….  they were nowhere to be found ….. maybe the neighbors scared them away ….

                        The opportunity never  came again to make  such  obedient friends.

                         

                        Sorry I digress… back to  seals ….

                         

                        Joining AOMCI has priviledges 🙂

                        • This reply was modified 1 year, 10 months ago by crosbyman.
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