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  1. Thread: Nissan NS40D2

    by fastcatt
    Replies
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    11,891

    As far as putting larger than stock carbs,...

    As far as putting larger than stock carbs, cutting heads and port timing changes. I am still trying to retain some tractability with the motor and fuel as it is on a fishing boat. I will probably...
  2. Thread: Nissan NS40D2

    by fastcatt
    Replies
    11
    Views
    11,891

    Is the 50D1 tuner enough of an improvement that...

    Is the 50D1 tuner enough of an improvement that it is worth taking the powerhead off to install?

    Thanks,

    Mark
  3. Thread: Nissan NS40D2

    by fastcatt
    Replies
    11
    Views
    11,891

    Hi all The 40 carbs are smaller than the 50...

    Hi all

    The 40 carbs are smaller than the 50 carbs. The 40 carbs were only opening up 2/3 from the factory.

    I think I am going to go with Boyesen Reeds and remover the stops.

    Did the...
  4. Thread: Nissan NS40D2

    by fastcatt
    Replies
    11
    Views
    11,891

    thanks for the replys Are the reed stops which...

    thanks for the replys

    Are the reed stops which are set at about .250 on the 40hp vs .360 on the 50hp hurting top end power? I am probably getting more flow thru the carbs with them opening more. ...
  5. Thread: Nissan NS40D2

    by fastcatt
    Replies
    11
    Views
    11,891

    Nissan NS40D2

    Hi all,

    New to the site, love the info I have found so far.

    I have a Nissan(tohatsu) NS40D2 tiller on a 16 foot shallow v aluminum boat. It probably weighs 400-450lbs. the cavitation plate is...
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