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  1. #1
    Member
    Join Date
    Jun 2004
    Location
    brown county IL
    Posts
    636

    1998 merc 200 efi rering ?'s

    Last fall when I put my boat up I did a lk down test and it getting on the high side. Runs great just doesn't carry the load as well feels lazy.
    Upgrades that I have done to this motor Heads cut by Jay Smith, TDR reeds, Det box removed timing set 25 and oil inj removed premix. I synk and link ck it every spring plus change filters
    Anyway as long as the piston and hole mic out ok any do' or don'ts to look out for. I also plan to have injectors cleaned been a few years for them.
    Thanks Justin
    JUSTIN LAWSON
    IL ANG 183FW Retired SMSGT
    1998 ASTRO2000 DC[Hooter Scooter] 200MERC EFI TRO4 23P
    Engine by Jay Smith Racing

  2. Member
    Join Date
    Jun 2013
    Location
    LONGVIEW TEXAS
    Posts
    14,037
    #2
    id bore it one size over 6 new pis / 98 mod prob got lil wear on pistons
    .................................................. ...the scariest thing in life is the unknown ...................................

  3. Mercury 3L/4 Stroke/Verado Moderator EuropeanAM's Avatar
    Join Date
    Apr 2008
    Location
    Greenville, SC (US)
    Posts
    95,253
    #3
    It will help you to receive faster, and more accurate responses if you will post your questions in the appropriate forum:

    Mercury - 2.0/ 2.4/ 2.5 Liter High Performance
    For discussions related to 2.0/ 2.4/ 2.5L motors (Carb, EFI, Optimax or Racing).


    Dual Mercury Master Technician- for Mercury Outboards, Mercruiser and Mercury Racing at European Marine in Greenville, SC.
    Still consider myself a "Marine Apprentice" after 47 years (learn something new every day).
    Mercury Parts, Mercury Outboards, Smartcraft & Accessories, Injector Service, TDR Reeds- BBC Sponsor

  4. Member
    Join Date
    Jun 2004
    Location
    brown county IL
    Posts
    636
    #4
    Got it moved over
    Thanks Don
    JUSTIN LAWSON
    IL ANG 183FW Retired SMSGT
    1998 ASTRO2000 DC[Hooter Scooter] 200MERC EFI TRO4 23P
    Engine by Jay Smith Racing