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Stripping oil pump drive gear on Mercury EFI

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  • Stripping oil pump drive gear on Mercury EFI

    I am looking for a fix for Mercury 150EFI (1998) oil injection pump gear located on the crankshaft (its plastic). This gear keeps stripping.


  • #2
    Re: Stripping oil pump drive gear on Mercury EFI

    Is it possible to remove the oiler and rn premix on an EFI motor? If so that might be one option.

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    • #3
      Re: Stripping oil pump drive gear on Mercury EFI

      TTRapid There is a steel gear available. It is recommended for a lot of high speed running. Those gears were known to fail and I believe at one time there was talk of a recall. Give the dealer a call and see if they have one or can get one.
      Rick

      "Boating is Life...All the rest is just Details"

      2007 Bentley 200 Cruise
      2007 Merc. 90 4 stroke

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      • #4
        Re: Stripping oil pump drive gear on Mercury EFI

        Rapair / CDI markets a trick little replacement deal that no longer relies on the gear. It's a very nice looking unit.Good luck!

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        • #5
          Re: Stripping oil pump drive gear on Mercury EFI

          just curious, how many times has this failure been repaired?

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          • #6
            Re: Stripping oil pump drive gear on Mercury EFI

            MERTECH, I have dad this failure twice in the last 2 years and it's getting me pissed off.

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            • #7
              Re: Stripping oil pump drive gear on Mercury EFI

              Dhadley, how do I get infomation on the mod you mentioned. Rapair/CDI.

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              • #8
                Re: Stripping oil pump drive gear on Mercury EFI

                Call Clark Beard or TJ at 256-772-3829.Good luck!

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                • #9
                  Re: Stripping oil pump drive gear on Mercury EFI

                  The plastic gears are for Mercury's recommende rpm range,less than 6000 rpm and strip easily. I have some friends that turn over 10000 rpm. Take the oil pump off and replace it with a block off plug that you can get from Mercury. Then mix your own oil/gas. If you continue to run the gear you will have a major melt downDave

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                  • #10
                    Re: Stripping oil pump drive gear on Mercury EFI

                    Just removed the oil pump from a pair or 200 Merc I bought,1 seized due to broke oil tube( they get brittle)Put plug in like mentioned.My motto on oil injection " it's not if it's going to fail,it's when". I like my motors.

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                    • #11
                      Re: Stripping oil pump drive gear on Mercury EFI

                      Call API Marine 800-327-6086 for information on Marine Solution's Electronic Oil Injection system.

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                      • #12
                        Re: Stripping oil pump drive gear on Mercury EFI

                        I installed an electronic oil injection system from G FOrce Technologies today. It works great and not to differcult to install.Thanks

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