Please note this thread has been inactive for 90 days. For the best results, please start a new thread.
Results 1 to 2 of 2
  1. #1

    Unhappy 1980 mercury 70 horse power problem.

    ok after talking with the guy i got the boat from, he told me he fooled around with the carbs and i have a feeling that when i put the boat in the lake and it is under load it keeps stalling.
    now i am not a marine mechanic but i have a feeling this is why it runs good with muffs, on but not under load.
    my question is do you turn the idle screws to the leftto gain more fuel ar to the right and by how much????.
    Or would i have a different problem.
    Ok just to recap i put the boat in the water ,start it up it idles fine with out stalling around 900 rpm,700-750, in gear i pour the coal to it and it just dies or i feed the throtle slowly and it starts to die after 10 to 15 seconds.
    any help or suggestions would be great.
    best regards gord maple ridge b.c
    Attached Images Attached Images

  2. #2
    Moderator JB's Avatar
    Join Date
    Mar 2001
    Location
    The Hideout, Whitt, TX, USA
    Posts
    45,241

    Default Re: 1980 mercury 70 horse power problem.

    One thread per topic, Capt.

    13. Please do not post multiple threads in multiple forums about a single problem. This is confusing to those trying to help you. Multiple threads in the same forum about the same issue is also confusing. If you want help fast, one thread in one forum is the best way to get it.

    It would be good to familiarize yourself with our rules.

Similar Threads

  1. 1980 Mercury 9.8: No Power
    By chattfisher in forum Mercury & Mariner Outboards
    Replies: 7
    Last Post: June 6th, 2010, 04:28 PM
  2. 1980 Mercury 90 Power Tilt Trim Problem
    By RLM in forum Mercury & Mariner Outboards
    Replies: 2
    Last Post: April 29th, 2009, 01:36 PM
  3. 1980 115 mercury power trim problem
    By markmac in forum Mercury & Mariner Outboards
    Replies: 3
    Last Post: March 14th, 2009, 07:02 PM
  4. 1980 johnson 15 horse idle problem
    By mike lewis8 in forum Johnson & Evinrude Outboards
    Replies: 4
    Last Post: August 17th, 2005, 06:04 PM
  5. evinrude 1980 70 hp power problem
    By kellytime in forum Johnson & Evinrude Outboards
    Replies: 0
    Last Post: May 24th, 2003, 08:17 AM
  1. iboats Forum Directory - Over 100,000 forum posts organized by topic