No forward / reverse thrust

Discussion in 'Jet Drives' started by barrygb, Jun 9, 2007.

  1. barrygb
    Joined: Jun 2007
    Posts: 2
    Likes: 0, Points: 0, Legacy Rep: 10
    Location: Westminster, MA

    barrygb New Member

    Hello All -
    I have a Boston Whaler jet boat with a 90 HP Johnson motor. After having it worked on last year, cleaned out, I finally got it started. I can get the engine to remain running and can move in a forward or reverse motion, and increase RPM's, still the boat only travels at about 2 MPH ... feels similar to a car with a transmission problem ...
    Any ideas / suggestions would be greatly appreciated.
     
    barrygb, Jun 9, 2007
    #1
  2. alan white
    Joined: Mar 2007
    Posts: 3,730
    Likes: 123, Points: 0, Legacy Rep: 1404
    Location: maine

    alan white Senior Member

    Have you checked your shear pin? Do jet boats use a common shear pin?

    Alan
     
    alan white, Jun 9, 2007
    #2
  3. alan white
    Joined: Mar 2007
    Posts: 3,730
    Likes: 123, Points: 0, Legacy Rep: 1404
    Location: maine

    alan white Senior Member

    Hey--- I know Westminster--- had a Jehovah Witness girlfriend there one time long ago, not too far fron Rte 2. My brother now lives in Princeton.
     
    alan white, Jun 9, 2007
    #3
  4. redtech
    Joined: Feb 2007
    Posts: 253
    Likes: 3, Points: 18, Legacy Rep: 27
    Location: suger pine, ca

    redtech Senior Member

    check the shimming of your impellor
    if plus .030 move shims from bottom of impeller to top this will bring the impellerdown into the liner and give you more thrust once the clearance is correct
     
    redtech, Jun 9, 2007
    #4

  6. barrygb
    Joined: Jun 2007
    Posts: 2
    Likes: 0, Points: 0, Legacy Rep: 10
    Location: Westminster, MA

    barrygb New Member

    Thanks for all the advice, guys, but as my girlfriend says "yikes" ... I'm not that mechanically inclined ...

    Barry
     
    barrygb, Jun 9, 2007
    #5
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