1988 50 hp Evinrude throttle problems

Discussion in 'Outboards' started by wwitz757, Jul 22, 2009.

  1. wwitz757
    Joined: Jul 2009
    Posts: 2
    Likes: 0, Points: 0, Legacy Rep: 10
    Location: salisbury

    wwitz757 New Member

    A friend of mine has a 1988 50 hp Evinrude. There is a problem with the throttle. When they open it up it races, but when they try to back it down it won't come back down. They checked the linkage and all that is freed up. The only way to get it to come back down is to shut the key off. Any help would be greatly appreciated.
     
  2. pistnbroke
    Joined: Jan 2009
    Posts: 1,405
    Likes: 34, Points: 48, Legacy Rep: 404
    Location: Noosa.Australia where god kissed the earth.

    pistnbroke I try

    Is the roller that follows the rotation of the advance mechanism and works the trottle following the cam properly ???
     
  3. kenJ
    Joined: Jul 2005
    Posts: 349
    Likes: 5, Points: 0, Legacy Rep: 56
    Location: Williamsburg, VA

    kenJ Senior Member

    Most throttle valves are spring loaded to the closed position. Check to make sure it still works.
     
  4. wwitz757
    Joined: Jul 2009
    Posts: 2
    Likes: 0, Points: 0, Legacy Rep: 10
    Location: salisbury

    wwitz757 New Member

    The butterfly roller valves do work properly. It does disengage when you pull the throttle back. When we pull the throttle back to the neutral position, the governor does not go back to idle.
     
  5. pistnbroke
    Joined: Jan 2009
    Posts: 1,405
    Likes: 34, Points: 48, Legacy Rep: 404
    Location: Noosa.Australia where god kissed the earth.

    pistnbroke I try

    the hand throttle does not work the butterflys it moves the advance mechanism under the flywheel ....as it rotates the roller follows the cam ...if the roller is in contact with the cam then its the linkage to the advance that is at fault ....move it directly by hand to try it ....you should see it all work ok without the engine running ....
     

  6. gonzo
    Joined: Aug 2002
    Posts: 15,516
    Likes: 1,052, Points: 123, Legacy Rep: 2031
    Location: Milwaukee, WI

    gonzo Senior Member

    It seems that is either binding or the spring is broken.
     
Loading...
Forum posts represent the experience, opinion, and view of individual users. Boat Design Net does not necessarily endorse nor share the view of each individual post.
When making potentially dangerous or financial decisions, always employ and consult appropriate professionals. Your circumstances or experience may be different.