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Results 1 to 7 of 7
  1. #1

    Default Merc 115Hp will turn over but not start. Help!

    I have a 1993 Mercury 115 HP, 4 Cyl, 2 stroke. Went to the lake the other day, unloaded it, started it up, boated to fishing spot, fished for an hour, went to move to another spot. Boat wouldn't start! Motor turns over easily, but won't start. Check for fuel, got it. Check for Spark, don't got it. Check the kill switch, it's good and in place. Where do I look next??????

  2. #2

    Default Re: Merc 115Hp will turn over but not start. Help!

    Your going to have to get yourself a wiring diagram. Possible causes, bad ignition module, bad coil, poor ignition wires or bad ignition trigger. Do you have an multimeter and now how to use it?

  3. #3
    Join Date
    Sep 2010
    Location
    ontario
    Posts
    9,664

    Default Re: Merc 115Hp will turn over but not start. Help!

    It can be difficult to check for spark in broad daylight.----------Try again in the evening or out of the sun with a proper spark checker.

  4. #4

    Default Re: Merc 115Hp will turn over but not start. Help!

    Yes I have a multimeter and know how to use it. I think the wiring diagram is on the bottom side of the deck lid. I have looked for broken wires, loose connections. I have even replaced ignition module. Still nothing. I just don't know what to check for with the meter.
    I will check for spark with a spark checker tonight.

  5. #5

    Default Re: Merc 115Hp will turn over but not start. Help!

    If the resut is no spark you can test the ignition trigger at the modue connector. will prodce an AC voltage while cranking. Test the primary wires on the coils using a test light One will have power and the other will fash when the engine is cranked. Report back.

  6. #6

    Default Re: Merc 115Hp will turn over but not start. Help!

    Quote Originally Posted by Ruggybuggy View Post
    If the resut is no spark you can test the ignition trigger at the modue connector. will prodce an AC voltage while cranking. Test the primary wires on the coils using a test light One will have power and the other will fash when the engine is cranked. Report back.
    Hey Ruggybuggy,
    I notice my starter drive stays engaged in the flywheel, even with the key off. It's loose, but it won't come down away from the flywheel. Does this mean anything?

  7. #7
    Join Date
    May 2012
    Location
    Maui
    Posts
    114

    Default Re: Merc 115Hp will turn over but not start. Help!

    Stator, trigger or switch box will leave no spark on all cyl. coil plugs and wire don't all go out at same time

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