Anyone tried this coil?

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This topic contains 11 replies, has 8 voices, and was last updated by Avatar johng 4 weeks, 1 day ago.

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    drifter
    US Member - 1 Year
    Replies: 98
    Topics: 59
    #167491

    I have some coils that the box label states BBT-B16421. “Replaces Lawnboy 580184”. Will these replace OMC P/N 580118? 1957 Sea King 5.5hp.
    Drifter

    seakaye12
    seakaye12
    US Member - 1 Year
    Replies: 358
    Topics: 96
    #167493

    Well I think so because if I put that part number into Google it comes back to an Amazon page that shows the OMC style coils (universal magneto) that would fit your Sea King.

    https://www.amazon.de/Z%C3%BCndspulen-584477-582995-Au%C3%9Fenborder-Zylinder-ROP-Shop/dp/B06XK884M3

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    drifter
    US Member - 1 Year
    Replies: 98
    Topics: 59
    #167496

    Yes, that’s what I see too. But…there is always a but…..I have the coils and the ones I have do not fit. There is an extra “brace” on the coil body that supports the spark plug wire port. This brace – on my coils – interferes with a land cast into the armature plate thus not allowing the coils to sit flat on the mounting plates. The attached photos show the interference areas (pencil pointing to them). Maybe the coils manufacturer changed how the coils are made????

    • This reply was modified 1 month ago by Mumbles Mumbles.
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    XR55
    US Member - 2 Years
    Replies: 285
    Topics: 29
    #167508

    Take a dremel and shape the coil to fit the mag plate.

    • This reply was modified 1 month ago by Avatar XR55.
    outboardnut
    outboardnut
    US Member - 1 Year
    Replies: 397
    Topics: 307
    #167511

    folllowing

    frankr
    frankr
    US Member - 1 Year
    Replies: 3936
    Topics: 43
    #167525

    The original Lawn Boy and OMC coils were interchangeable, but it appears you are dealing with modern aftermarket coils.

    Ignorance is simply a lack of education. Ignorance can be cured. There is no cure for Stupid.

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    crosbyman
    Canada Member - 1 Year
    Replies: 1108
    Topics: 147
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    jeff-register
    US Member - 1 Year
    Replies: 1037
    Topics: 41
    #167576

    Just checked, Amazon is out of them now. 2/18/19 @ 19:40 hrs

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    crosbyman
    Canada Member - 1 Year
    Replies: 1108
    Topics: 147
    #167591

    try eBay

    Avatar
    drifter
    US Member - 1 Year
    Replies: 98
    Topics: 59
    #167603

    The gentleman I bought them from has graciously offered to take them back. I could grind off the land (which is filled with potting “epoxy”?) but I feel that modifying these parts is just not the way I want to rebuild a magneto.

    Avatar
    crosbyman
    Canada Member - 1 Year
    Replies: 1108
    Topics: 147
    #167604

    McGiver does it all the time and finds alternatives but that is a personal choice . imho adapting the coil or the base is not likely a reason to worry about reliability if that is your main concern.

    Case in point most folks replace outboard rectifiers with OEM eqpt at a high price.

    Rectifiers are simple 4 way diode bridges and you can buy a high capacity 4 way bridge rectifier for 3-4 dollars …. but it does not come with a fancy molding and mounting hardware leaving room to imagination as to how it can be fitted in…. but it is still a rectifier.

    Avatar
    johng
    US Member - 1 Year
    Replies: 75
    Topics: 8
    #167660

    I was told that the OMC Lawnboy Coils will not work in a Outboard Motor. They are a bolt in replacement but have less Secondary Windings. The motor will not Rev up to the correct RPM due to this fact. (they are intended for Low RPM 1 Cyl Air Cooled Lawn Mower Engines). You can identify these by the Small Pin in the Spark Wire Socket. I think we need ” Garry Spencer” to comment on this.

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