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  1. #1
    Cadet MdCrappie's Avatar
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    Default 1991 Tohatsu 25 to 30

    First off let me say that I have been "lurking" on the forum for a few years now, and up till now I have been able to find all of my answers without posting, hence the reason I just registered. This forum is filled with info.

    Now my question - I'm looking at purchasing a 1991 25 HP tohatsu. I have been looking for a 30hp outboard.
    Can the 1991 tohatsu 25 (I think it would be an M25C2) be converted to the 30hp (M30A3) with just the carb restrictor plate removal, like the newer models?

    Also - I have a newer (2002) 9.8 and it has been a great motor. The motor I am thinking about buying is about 100 miles away. Anything in particuliar with the older Tohatsu that I should look for that were problems areas?

    Thanks for any help.

  2. #2
    Vice Admiral TOHATSU GURU's Avatar
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    Default Re: 1991 Tohatsu 25 to 30

    "Can the 1991 tohatsu 25 (I think it would be an M25C2) be converted to the 30hp (M30A3) with just the carb restrictor plate removal, like the newer models?"

    No/yes.

    You have to replace the gasket that is on there now with a 30 hp gasket.

    "Anything in particuliar with the older Tohatsu that I should look for that were problems areas?"

    Nope
    Elvin
    My answers are like Zen...It may not be the answer you want, but it is generally the answer you need.

    The 3 Rules:

    1) Look in your service manual first...Then ask me if it is correct.
    2) Understand that your desire to repair your engine does not mean that you have the ability to do so.
    3) If you are confused, take your engine into a dealer..Then let them be confused...At least, in theory, they sent someone to outboard 101.

  3. #3
    Cadet MdCrappie's Avatar
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    Default Re: 1991 Tohatsu 25 to 30

    Thanks - That's what I was hoping for

  4. #4
    Chief Petty Officer kandil's Avatar
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    Default Re: 1991 Tohatsu 25 to 30

    it is very easy to convert there is a link her on how to do it I well try to find and repost later.I would look for fuel leak from the check valve you will see some fuel under it at the bottom on the port side other than that if it was maintained you will be very happy with it good luck
    http://rib.net/forum/showthread.php?t=25933
    http://forums.iboats.com/showthread....tsu+cold+start

  5. #5

    Default Re: 1991 Tohatsu 25 to 30

    Would this same procedure work on a 2005 Nissan 2 cycle 25HP to convert it to a 30HP?

  6. #6
    Vice Admiral TOHATSU GURU's Avatar
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    Default Re: 1991 Tohatsu 25 to 30

    Yep
    Elvin
    My answers are like Zen...It may not be the answer you want, but it is generally the answer you need.

    The 3 Rules:

    1) Look in your service manual first...Then ask me if it is correct.
    2) Understand that your desire to repair your engine does not mean that you have the ability to do so.
    3) If you are confused, take your engine into a dealer..Then let them be confused...At least, in theory, they sent someone to outboard 101.

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