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  1. #1
    Member
    Join Date
    Mar 2012
    Location
    Plainfield IL 60586.
    Posts
    191

    New to me Mercury 75 hp questions

    Hello ,
    I have a 2002 75 hp Elpto serial OT 463935
    Just purchased a used pontoon over the winter so i did not get to test in water , seen only running on muffs .
    I have a few questions about how the motor ran on its first week end out .
    This is how it went.
    First started ok had to give it 5 min to warm up to stay running .
    Drove from the dock to the house about 15 min run . Noticed the Tachometer was way off 6 to 7 k rpm
    Then eratic from 4 to 5 k rpm then seemed to smooth out.
    But motor seamed to have stumble if moved to wot.
    IT Smoked alot at idle and seems to shake alot even at higher speeds
    The person i bought it from said to runn it and get fresh gas so i did .
    What should i be looking at carbs or ignition , seems it could run better but not sure .
    Took out the next day and ran same but got harder to start.
    Any help would be appreciated .
    Thank you.

  2. Member
    Join Date
    Jun 2013
    Location
    LONGVIEW TEXAS
    Posts
    14,011
    #2
    fuel system/ pulse pump / be sure you check the oil injection check valve bad about leaking pure oil into fuel line while sitting
    .................................................. ...the scariest thing in life is the unknown ...................................