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  1. #1

    Default 1993, 90 hp. 3cly. Won't start.

    My starter was on the way out and kept on jamming. When I replaced same, it worked fine, but now the usual reliable starting motor would not start. I replaced the stator, trigger, and the cd box (the brain), to no avail. The coils seem fine, but now I am thinking the regulator. I hate to replace it, but I am running out of options. Any help would be appreciated. I am ready to bring it to the shop (God forbid).

  2. #2
    Join Date
    May 2010
    Sebastian ,Fl

    Default Re: 1993, 90 hp. 3cly. Won't start.

    The motor turns over? Just won't start?
    What model# Serial # always helps to know what motor were working on??

    Compression test?
    Spark Test?

    First: check the battery, weak slow turning battery might not get it turning fast enough??
    Check the kill switch and see if it's working?
    Then unhook the tachometer, sometimes the tach shorts internally and won't allow the motor to fire.
    Unhook the regulator and see if that helps?

    No Fire At All:
    Disconnect the black/yellow kill wire AT THE PACK and retest. If the engine’s ignition fires now, the kill circuit has a fault-possibly the keyswitch, harness or shift switch.
    Disconnect the yellow wires from the stator to the rectifier and retest. If the engine fires, replace the rectifier.
    Check the cranking RPM. A cranking speed less than 250-RPM will not allow the system to fire properly.
    Check the stator resistance and DVA output as given below:

    Outboard ignition.com has test procedures for your motor.

    Do these tests and get back to us.
    88 Bayliner with 2002 225 HP Mercury EFI

    Buy American made Cars and Trucks!!!Towing insurance for a boat,a GREAT thing.
    ​Tools to make my life easier: Battery tester, die grinder, temp.gun, compression tester, DVA meter.

    In Scenic , Beautiful San Sebastian by the sea Florida

  3. #3

    Default Re: 1993, 90 hp. 3cly. Won't start.

    Jerryjerry05, thanks for getting back to me. I see you are a major contributor to this forum, and seem very knowledgeable about mechanics. I tried four times to reply to you but my computer wouldn't let me. Right now, I think I am going to go with a new regulator/rectifier, as this is the only thing that I really didn't change yet.
    I will let you know how it works out. Rather be safe than sorry. Thanks again. Still winter here, so I have some time to think it over.

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