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  1. #1

    Default Nissan NS70AS 70 hp

    I am looking at purchasing a Nissan 70 hp motor. It is a late 80's early 90's model. Anything I should make sure to look for before purchasing besides compression. Not sure about the 2 cylinder and it being a 70 hps. I am wanting to put it on to my pontoon that currently has a 50 hp evinrude.

  2. #2
    Join Date
    Mar 2010
    Location
    Buffalo, NY, USA
    Posts
    2,078

    Default Re: Nissan NS70AS 70 hp

    It's an oldie. Getting a bit obsolete. Nice throttle response: with just 2 cylinders, the mass is low. No wp kits available, but bare impellers are. No carb kits available, but a few carb parts are. CD boxes are still available. Beware the money pit.
    Paul
    Buffalo NY USA

  3. #3

    Default Re: Nissan NS70AS 70 hp

    I'm not sure of what the NS70AS model is but I have a NS70C that at the moment can't be repaired because the magnets on the flywheel have come loose. I've been told that the flywheels on ANY motor with bonded magnet based magneto should be pulled and inspected every couple of years to prevent (?) this but at what cost? Check my post under FLYWHEEL MAGNETS if you want a fuller explanation.

  4. #4
    Join Date
    May 2011
    Location
    slough ,berkshire uk
    Posts
    161

    Default Re: Nissan NS70AS 70 hp

    do yourself a big favour and steer clear of any tohatsu unless its under 10 years old.
    I contacted tohatsu in japan and they cold not tell me the simple wiring diagram of a 2 year old motor, everything over 10 years get deleted by tohatsu

  5. #5
    Join Date
    Mar 2010
    Location
    Buffalo, NY, USA
    Posts
    2,078

    Default Re: Nissan NS70AS 70 hp

    Quote Originally Posted by phillnjack View Post
    do yourself a big favour and steer clear of any tohatsu unless its under 10 years old.
    I contacted tohatsu in japan and they cold not tell me the simple wiring diagram of a 2 year old motor, everything over 10 years get deleted by tohatsu
    Bull.

    The wiring diagram of older motors is right in the owners manuals, which are online.
    The issue with all Japanese motors, and now domestics as well, is that they sub-out all the small bits -- carbs, electrical motors, etc. When models change, the subs drop that product. Sucks for older units, but that is the current way things are going. Try to get alternator magnets for a 1980 Ford. Same thing.
    Paul
    Buffalo NY USA

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