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  1. #1

    Default 1998 force 75 hp 2 stroke chocolate milk coming out of exhaust

    Hello all
    So my engine started "surging" about 150 rpm at WOT and Im down 4-6mph at top speed. I changed fuel line, filter and pulled carb and cleaned very well.
    I went out and ran it again still same problem. Only ran at WOT for 5 miles and when I pulled the boat this time I had chocolate milk colored sludge pouring out of the exhaust on back of engine. Nothing coming out of prop though.
    Im kinda leaning twords head gasket but I have no water on plugs that I can tell. Im really just looking at a place to start troubleshooting and any other advice is greatly appreciated.
    Thanks in advance.

  2. #2
    Join Date
    Sep 2010
    Location
    ontario
    Posts
    15,351

    Default Re: 1998 force 75 hp 2 stroke chocolate milk coming out of exhaust

    Compression test needs to be done.----Checked fuel pump diaphragm ?----Thermostat checked ?

  3. #3

    Default Re: 1998 force 75 hp 2 stroke chocolate milk coming out of exhaust

    Im getting a compression tester this morning.
    Have not checked anything yet. This just happened yesterday so Im jumping on it today. What should I look for in the pump? the motor pumps water well but I will inspect the thermostat as well.
    Thank you

  4. #4
    Join Date
    May 2010
    Location
    Sebastian ,Fl
    Posts
    2,604

    Default Re: 1998 force 75 hp 2 stroke chocolate milk coming out of exhaust

    Compression results?
    PLEASE,NO PERSONAL MESSAGES IF THE QUESTION CAN BE ASKED ON THE OPEN FORUM
    88 Bayliner with 2002 225 HP Mercury
    Buy American made Cars and Trucks!!!Towing insurance,get it.
    In Scenic Beautiful Sebastian by the sea Florida

  5. #5

    Default Re: 1998 force 75 hp 2 stroke chocolate milk coming out of exhaust

    Compression checked perfect 125-127 psi on all 3 cylinders.
    It wound up being the diaphram in the fuel pump broke and was sucking extra fuel into the engine and pouring raw fuel from the exhaust.
    I rebuilt the pump and all is well!!!
    Thanks

  6. #6
    Join Date
    May 2010
    Location
    Sebastian ,Fl
    Posts
    2,604

    Default Re: 1998 force 75 hp 2 stroke chocolate milk coming out of exhaust

    Glad it works.
    PLEASE,NO PERSONAL MESSAGES IF THE QUESTION CAN BE ASKED ON THE OPEN FORUM
    88 Bayliner with 2002 225 HP Mercury
    Buy American made Cars and Trucks!!!Towing insurance,get it.
    In Scenic Beautiful Sebastian by the sea Florida

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