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around 1990 suzuki dt 40 runs good to full speed then slows by itself

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  • around 1990 suzuki dt 40 runs good to full speed then slows by itself

    my dt40 idles great takes off to full speed with no problem and then just slows to about 18 miles per hour,motor still sounds good with no excessive rpm's.Put it back in neautral and it will go back to full speed with no problem and then will slow to about half speeed by itself ,I cant see anything loose,this is a used motor I bought.this motor runs good and sounds better.

  • #2
    Re: around 1990 suzuki dt 40 runs good to full speed then slows by itself

    does rpm stay the same? yhen try another prop,sounds like prop slip
    sigpic[FONT="System"][/. ase master tech

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    • #3
      Re: around 1990 suzuki dt 40 runs good to full speed then slows by itself

      [QUOTE=stylesabu;4260389]does rpm stay the same? yhen try another prop,sounds like prop slip[/QUOT rpm's go down it is as I am reducing speed myself,when the motor slows by itself to around half speed it sounds completely normal

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      • #4
        Re: around 1990 suzuki dt 40 runs good to full speed then slows by itself

        Originally posted by markb2360 View Post
        my dt40 idles great takes off to full speed with no problem and then just slows to about 18 miles per hour,motor still sounds good with no excessive rpm's.Put it back in neautral and it will go back to full speed with no problem and then will slow to about half speeed by itself ,I cant see anything loose,this is a used motor I bought.this motor runs good and sounds better.
        Did you ever resolve this problem. I am having the exact same issue.

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        • #5
          Re: around 1990 suzuki dt 40 runs good to full speed then slows by itself

          Could be fuel supply issue. Is the primer bulb firm when this happens? Fuel filter clean?

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          • #6
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            Re: around 1990 suzuki dt 40 runs good to full speed then slows by itself

            This thread is almost a year old. Please start your own thread if you have questions......

            http://forums.iboats.com/forum-rules...es-397820.html

            Thanks,
            WIMUSKY

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