Get instant online access to repair manuals for your Mercury / Mariner outboard. Online Manuals
Order printed Mercury / Mariner service manuals — shipped to your door! Printed Manuals
Use engine diagrams to find & order parts for your Mercury / Mariner engine. Engine Diagrams
Find parts quickly with Mercury application guides. Quick Parts Guide
Results 1 to 2 of 2
  1. #1
    Pat Lincoln's Avatar
    Pat Lincoln Guest

    Default "2000Mercury 90hrp 4-stroke.

    "2000Mercury 90hrp 4-stroke. New plugs, right gap.Cranks right away, Idels with engine shaking, but does not go dead, just rough. Put the throttle all the way and it runs fine."

  2. #2
    Join Date
    Jan 2008
    , Victoria, Australia

    Default "idle air mixture screw, find

    "idle air mixture screw, find it on the carb, wind it in fully then 2.5 turns out anticlockwise and see how it goes, if it stalls or runs rougher wind it in half a turn, if u get to 1.5 turns back in and it is still running rough and it hasnt changed the sound or smoothness of the engine you may need to remove the carb as it may have blocked slow idle jet and needs attention."

Similar Threads

  1. Replies: 4
    Last Post: 12-06-2010, 07:10 AM
  2. 1999 250 hp Won't idle, runs rich, fine @ WOT
    By mike77cj in forum Yamaha Outboard Forum
    Replies: 0
    Last Post: 06-03-2010, 10:07 PM
  3. Chrysler 440 runs bad between idle and 1000 rpm
    By prestonstark in forum Chrysler Inboard and Sterndrive Forum
    Replies: 1
    Last Post: 07-09-2009, 07:26 PM
  4. Evinrude runs rough at low speed
    By sun490 in forum Johnson Evinrude Outboard Archive
    Replies: 1
    Last Post: 12-19-2007, 08:25 AM
  5. b03 mercury 115hp runs rough when running in idle speed
    By rangermercman in forum Mercury Mariner Outboard Archive
    Replies: 5
    Last Post: 09-09-2007, 10:50 PM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts