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1989 mercury hard start when cold and runs ruff

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  • 1989 mercury hard start when cold and runs ruff

    I am new here and to outboards and need help I have a 1989 mercury 25hp 2 stroke 2 cylinder single carbureted and I can barely get it to start I have to put starting floud in order for it to start and sometimes that doesn't work but when I get it running it runs very ruff and want to die on me I have replaced both coils wires and plugs but it still doing the same thing what should I do??

  • #2
    The choke system on that engine doesn't work very good. The passages in carb has to be perfectly clean in order to get fuel to primer and have to make sure primer diaphragm is in good condition, there is a service kit, part number 9844A1 to rebuild choke primer.
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