Merc 3 cyl 2 stroke

Discussion in 'DIY Marinizing' started by steele m.a., Dec 24, 2010.

  1. steele m.a.
    Joined: Dec 2007
    Posts: 44
    Likes: 0, Points: 0, Legacy Rep: 10
    Location: Victoria B.C. Canada

    steele m.a. Designer/Engineer

    I have a strange motor I need assistance with . A mercury 2 stroke , in a
    Bayliner 20 ski boat ( sterndrive ).
    It is a 3 cylinder vertical 2 stroke .
    I need to know more about this beast , if any one out there can assist me.
    A friend got it , with boat , as an insurance adjustment .
    It runs , but is not as reliable as I would like it to be.
    The Merc shop says it's doing what it's supposed to do , but I disagree .
    It won't idle , it has dual carbs , synchro joined , on one side of the thing .
    Answers ?
    marksteele2010@yahoo.ca
     
    steele m.a., Dec 24, 2010
    #1
  2. gonzo
    Joined: Aug 2002
    Posts: 16,475
    Likes: 1,494, Points: 123, Legacy Rep: 2031
    Location: Milwaukee, WI

    gonzo Senior Member

    By don't idle, do you mean it dies?
     
    gonzo, Dec 24, 2010
    #2
  3. steele m.a.
    Joined: Dec 2007
    Posts: 44
    Likes: 0, Points: 0, Legacy Rep: 10
    Location: Victoria B.C. Canada

    steele m.a. Designer/Engineer

    Yes . Rough running beast . Owner has me holding dual throttle open to keep it alive.
    Won't idle - dies .
     
    steele m.a., Dec 25, 2010
    #3

  5. gonzo
    Joined: Aug 2002
    Posts: 16,475
    Likes: 1,494, Points: 123, Legacy Rep: 2031
    Location: Milwaukee, WI

    gonzo Senior Member

    Start with a compression test. Then test the spark on all cylinders. Rebuild the carburators and synchronize them. Adjust the timing.
     
    gonzo, Dec 25, 2010
    #4
Loading...
Similar Threads
  1. jfreemanTMN

    Marinizing a Mercedes 240D Engine??

    jfreemanTMN, Feb 11, 2018, in forum: DIY Marinizing
    Replies:
    15
    Views:
    7,393
    jfreemanTMN
    Feb 17, 2018
  2. jrnj

    VW TDI diesel-Merc Bravo 2 outdrive for houseboat

    jrnj, Jul 19, 2015, in forum: DIY Marinizing
    Replies:
    16
    Views:
    11,267
    FAST FRED
    Nov 19, 2015
  3. TomBradbury

    4.3 Mercruiser to Diesel

    TomBradbury, May 25, 2013, in forum: DIY Marinizing
    Replies:
    8
    Views:
    13,256
    TomBradbury
    Jun 5, 2013
  4. Loosecannon

    MerCruiser 470 heat exchanger on a v8 engine?

    Loosecannon, Jun 6, 2011, in forum: DIY Marinizing
    Replies:
    4
    Views:
    3,761
    Loosecannon
    Jun 7, 2011
  5. mmanning63

    4.3L Vortec mercruiser cracked block - swap with automotive engine block?

    mmanning63, Jun 19, 2010, in forum: DIY Marinizing
    Replies:
    75
    Views:
    157,628
    powerabout
    Aug 22, 2011
  6. Engmark

    Marinizing Audi 2.5 TDi (5 cyl) - Questions

    Engmark, Jun 11, 2014, in forum: DIY Marinizing
    Replies:
    25
    Views:
    12,922
    mydauphin
    Nov 24, 2016
  7. alanrockwood

    AMC 258 six cylinder

    alanrockwood, Apr 3, 2011, in forum: DIY Marinizing
    Replies:
    10
    Views:
    3,692
    Boat Design Net Moderator
    Apr 7, 2011
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.