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    • Mars Lion 7 inch DD waterproof search coil for Fisher F2 and F4 metal detectors, top view with mounting bracket and cable
    • Mars Lion 7 inch round DD search coil for Fisher F2 and F4 metal detectors with coiled cable and connector
    • Mars Lion 7 inch DD waterproof search coil for Fisher F2 and F4 with black cable, red strain relief and mounting bracket
    • Mars Lion 7 inch DD search coil in black with a red-collared cable and mounting bracket, for Fisher F2 and F4 detectors
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    Mars Lion 7 inch DD Waterproof Search Coil for Fisher F2 and F4 Metal Detectors

    Vendor:Mars Type:Coils
    SKU: MMD-FISHER-LION-F2F4
    Sale Price $93.00 Regular Price $135.00

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    4.9 from 3,100+ verified reviews · 4.8 on Google
    • Authorized U.S. dealer Genuine Mars, full manufacturer warranty.
    • Ships today Order by 3 PM ET Mon to Fri, noon ET Sat. Free shipping on orders $99+.
    • 30-day free returns Prepaid return label included.
    • Talk to a detectorist (844) 771-0707, Mon to Fri, 10 AM to 4 PM ET.

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    The MarsMD 7 inch DD coil (sold as the Lion 7) is a Double-D search coil measuring 7 inch (18 cm), in the version made for the Fisher F2 and F4. MarsMD made its 7 inch coil for challenging places: it is lightweight and compact, and it picks out non-ferrous targets even in very trashy areas.

    Configuration
    Coil Lion 7, 7 in
    Type Double-D (DD)
    Fits Fisher F2, F4
    Waterproof Yes

    What is in the box with the Lion 7

    MarsMD's standard contents for the MarsMD 7

    • Lion 7 inch DD search coil
    • Coil cover
    • Connector protection cap to keep dirt and dust out when the coil is not in use
    • Coil attachment bolt with mounting nut
    • Two rubber rings

    Cable end-boot color may vary.

    Which detectors the Lion 7 fits

    • Fisher F2
    • Fisher F4

    We carry separate versions of the Lion 7 for different detectors, each listed by the detector it fits. The version here is for the Fisher F2 and F4, so check the model on your control box before you order. Versions for other detectors are in our MarsMD Search Coils collection.

    When to use the Lion 7

    The Lion 7 is a Double-D coil with high discrimination, at home in thickets and tall grass where reliable identification of non-ferrous targets matters. MarsMD makes only Double-D coils, and every MarsMD coil is waterproof. MarsMD gives its weight as from 370 g (13.1 oz), since the weight can run higher depending on the detector version. The coil body is filled with high quality epoxy resin inside a high impact resistant, UV protected plastic shell. It has a robust mounting bracket and a screw-on connector, and the cable strain relief keeps the cable entry waterproof. The coil is protected against electrical interference.

    For the F2 or F4, the Lion is the close-work coil for thickets, tall grass and iron-heavy ground. Short sweeps let you pull a good signal apart from the iron beside it. On open ground, switch to the 10 x 6 inch Sniper or the 13 inch Discovery, which we also carry for the F2 and F4 and which take in more ground per pass. Our metal detector coil guide explains how coil size and type trade coverage for separation.

    Lion 7 specifications

    Specification Lion 7
    Size 7 in (18 cm)
    Type Double-D (DD)
    Weight from 370 g (13.1 oz)
    Feature High discrimination
    Waterproof Yes
    Connector Screw-on
    Construction Epoxy resin filled, impact resistant UV protected shell
    Fits Fisher F2, F4
    Warranty 3 years from the date of purchase

    MarsMD gives its coils a 3-year warranty from the date of purchase. Every MarsMD coil we carry is in our MarsMD Search Coils collection.

    Serious Detecting is a family-owned, authorized MarsMD dealer with a showroom in Ypsilanti, Michigan, and our staff help by phone or email.

    Product Specifications
    Specification Name Specification Value
    Compatibility
    Fits Fisher Fisher F2 and Fisher F4
    Coil
    Coil Size 7" (18 cm)
    Coil Type Double-D (DD)
    Coil Shape Round
    Coil Build Open
    Coil Connection Wired
    Waterproofing
    Water Resistance Waterproof
    Details
    Color Black
    Box & Warranty
    Warranty 3 Years
    Service & Support

    Warranty & Product Assurance

    At Serious Detecting, we stand behind the quality of every product we offer. Warranty coverage is provided directly by the manufacturer and may vary depending on the item. We’re here to help you understand your coverage and assist with the warranty process when needed. If you ever have questions or need support navigating a warranty claim, our team is happy to guide you.

    Technical Support & Expert Guidance

    Whether you’re setting up new gear, optimizing performance, or troubleshooting an issue in the field, our knowledgeable support team is here to help. We use this equipment ourselves, so we can offer real-world tips and step-by-step assistance to get you detecting with confidence. Message us anytime and we’ll do our best to get you pointed in the right direction fast.

    Manuals, Resources & Downloads

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    Replacement Parts & Accessories

    Keep your equipment running strong with genuine parts and accessories. We carry coils, batteries, chargers, protective gear, digging tools, and more — fully compatible with your detector and backed by manufacturer standards. Not sure what fits your model? Just ask — we’re here to help.

    Training & Tutorials

    New to detecting or upgrading to advanced equipment? Our resource library includes helpful guides, maintenance tips, how-to videos, and expert advice from experienced detectorists. From ground balancing and coil choices to target ID basics and field technique, you’ll find the knowledge you need to level up your success.

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