Welcome Guest - Sign Up today
Welcome Guest - Sign Up today

Announcement

Collapse

Help Tip: If you have a question that has not been answered to your satisfaction in the archives, it is always best to start a new thread of your own. By starting your own thread, you will receive the maximum number of views by forum members.

Please note this topic has been inactive for 90 days. For the best results, please start a new topic.

Thank you all in advance for doing your part in helping iboats run a smooth ship.

Additional forum rules linked below.
http://forums.iboats.com/forum-rules-guidelines-405/
See more
See less

1983 7.5 hp mercury carb to throttle linkage

Collapse
X
  • Filter
  • Time
  • Show
Clear All
new posts

  • 1983 7.5 hp mercury carb to throttle linkage

    Hi.i Need some help with with this motor.sn is 6240895.after water pump change I started the motor and idle is pretty high.noticed that there is no linkage between carburetor and throttle,only choke is hooked up to butterfly, and it stays wide open when advancing the spark/trigger lever.is this normal that carb butterfly stays in one(open) position at all times?.also....what is tune up procedure?i just acquired this engine and any help would be nice.thanx

  • #2
    Re: 1983 7.5 hp mercury carb to throttle linkage

    There should be linkage from the throtal to the carb and a cable from the choke nob to the shutter in the throat of the carb. A picture of the carb would help. PO might have had the carb off the motor and did not replace it as it should be or lost some of the linkage. The shutter in the throat of the carb is for the choke and should open and close when the nob is moved.
    JMO
    Oldman570

    Comment


    • #3
      Re: 1983 7.5 hp mercury carb to throttle linkage

      her is some picsClick image for larger version

Name:	018.jpg
Views:	1
Size:	145.9 KB
ID:	7060651Click image for larger version

Name:	014.jpg
Views:	1
Size:	146.0 KB
ID:	7060653Click image for larger version

Name:	015.jpg
Views:	1
Size:	143.9 KB
ID:	7060654Click image for larger version

Name:	016.jpg
Views:	1
Size:	138.1 KB
ID:	7060655.
      i see.there is two shutters in that carb.one for choke and one for throttle.did not see the one further inside the carb.is there a special procedure for link and sync on this engine.i tried to adjust carb idle for lover revs with no result.its still reving too high.thanx

      Comment


      • #4
        Re: 1983 7.5 hp mercury carb to throttle linkage

        The idle has to be set with the motor in a barrel of water or in water with the motor in FWD gear. It has to have that backpressure to be set correcly. The RPM's should be set at 650 to 700 RPM and the idle jets should be set at 1 1/2 turns out from lightly seated and adjusted alittle rich from best idle. The adjusting screw for the idle is on the lever of the linkage above the cables with the set lock nuts, from the way it looks to me, to set the idle at the recommended RPM as the idle jet is being set. JMO
        Oldman570

        Comment


        • #5
          Sign up today
          Re: 1983 7.5 hp mercury carb to throttle linkage

          Ok.will do that.thanx.

          Comment

          Working...
          X