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  1. #1
    Cadet
    Join Date
    Mar 2003
    Location
    Trinidad
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    4

    Default 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. #2
    Commander
    Join Date
    Mar 2002
    Location
    Fort Worth Texas
    Posts
    2,377

    Default 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.

  3. #3
    Supreme Mariner rickdb1boat's Avatar
    Join Date
    Jan 2002
    Location
    St. Louis, Mo
    Posts
    11,183

    Default 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

  4. #4
    Supreme Mariner
    Join Date
    Feb 2001
    Location
    Port Charlotte FL but never the same since hurricane Charlie
    Posts
    16,978

    Default 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!

  5. #5
    Seaman
    Join Date
    Mar 2003
    Location
    naples fl.
    Posts
    73

    Default Re: Stripping oil pump drive gear on Mercury EFI

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

  6. #6
    Cadet
    Join Date
    Mar 2003
    Location
    Trinidad
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    4

    Default 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.

  7. #7
    Cadet
    Join Date
    Mar 2003
    Location
    Trinidad
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    4

    Default Re: Stripping oil pump drive gear on Mercury EFI

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

  8. #8
    Supreme Mariner
    Join Date
    Feb 2001
    Location
    Port Charlotte FL but never the same since hurricane Charlie
    Posts
    16,978

    Default Re: Stripping oil pump drive gear on Mercury EFI

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

  9. #9

    Default 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

  10. #10

    Default 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.

  11. #11
    Cadet
    Join Date
    Sep 2002
    Location
    Waukesha, WI
    Posts
    24

    Default 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.

  12. #12
    Cadet
    Join Date
    Mar 2003
    Location
    Trinidad
    Posts
    4

    Default 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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