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  1. #1

    Default Yamaha 2000 Model C40TLRY 2 stroke outboard

    New to forum. An owner, not a mechanic. There is water getting into the lower unit of my outboard. The lower unit oil when drained is split pea soup colored. Motor still runs fine.
    My questions are: Excluding the two screws used for adding and draining the lower unit oil, what are the other places where water can enter the lower unit? Could seals be damaged when the impeller is changed?
    Just trying to get an idea of how complicated the problem might be before the motor sees a mechanic.
    Thanks for any help.

  2. #2
    Join Date
    Sep 2010
    Location
    ontario
    Posts
    13,765

    Default Re: Yamaha 2000 Model C40TLRY 2 stroke outboard

    Seals are not damaged when an impeller is changed !----In a cold / freezing climate ??-----Yamaha seals sometimes are " all rubber " and may not grip in housings after many years.-----Not an impossible job to install a seal kit yourself.

  3. #3

    Default Re: Yamaha 2000 Model C40TLRY 2 stroke outboard

    Quote Originally Posted by racerone View Post
    Seals are not damaged when an impeller is changed !----In a cold / freezing climate ??-----Yamaha seals sometimes are " all rubber " and may not grip in housings after many years.-----Not an impossible job to install a seal kit yourself.
    Are there other points of water entry other than the seals?

  4. #4
    Join Date
    Sep 2010
    Location
    ontario
    Posts
    13,765

    Default Re: Yamaha 2000 Model C40TLRY 2 stroke outboard

    Sorry---I guess your best approach is to hurry to a shop.---Have them pressure test the lower unit.----Ask them to fix the leak.----All it takes is $$$

  5. #5

    Default Re: Yamaha 2000 Model C40TLRY 2 stroke outboard

    If water has intruded into the gear box it's because you've got at least 1 bad seal. Good thing you caught it earlier enough before real damage was done. Depending on your level of comfort with engine mechanics, replacing seals is pretty straight forward. Make sure you have the specific model year service manual for your engine handy before digging in.

  6. #6

    Default Re: Yamaha 2000 Model C40TLRY 2 stroke outboard

    Thanks for your insights. With my level of expertise with engine mechanics, as "racerone" said, I "better hurry to the shop" and have a professional do the work.

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