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Mercruiser Ignition System

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guidebook

Parts Selection Guide

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Prop Selection Guide

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      • NGK BPR6EFS Spark Plug
        $4.49
        $3.49

        NGK BPR6EFS Spark Plug This standard spark plug features a copper core to promote heat dissipation and more efficient spark plug operation; has a threaded terminal. Check your engine and maintenance manual for the correct spark plug and only use as...

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      • NGK BR6FS Spark Plug
        $4.49
        $3.49

        NGK BR6FS Spark Plug The NGK BR6FS Spark Plug is a standard NGK plug. NGK Standard plugs are an OE cornerstone that have provided decades of reliable performance. The solid copper core offers superior heat dissipation, conductivity, and broad heat range...

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      • Champion QL77JC4 Spark Plug
        $4.99
        $3.49

        Champion QL77JC4 Marine Spark Plug Champion marine spark plugs are quality OEM replacements. The Champion QL77JC4 Spark Plug features a copper core electrode that provides increased conductivity and heat control for good overall wear. These marine spark...

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      • Champion RV15YC4 Spark Plug
        $3.49
        $2.49

        Champion RV15YC4 Copper Plus Marine Spark Plug Champion marine spark plugs are quality OEM replacements. The Champion RV15YC4 Spark Plug features a copper core electrode that provides increased conductivity and heat control for good overall wear. These...

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      • Champion RS12YC Spark Plug
        $3.49
        $2.49

        Champion RS12YC Copper Plus Marine Spark Plugs Champion marine spark plugs are quality OEM replacements. The Champion RS12YC Spark Plug features a copper core electrode that provides increased conductivity and heat control for good overall wear. These...

        Add to Cart
      • Sierra 18-5273 Tune Up Kit Replaces 805759Q3
        $49.99
        $34.99

        Sierra 18-5273 Mercruiser Tune Up Kit for V8 Thunderbolt HEI Ignitions  Sierra high-quality engine parts are designed to meet OEM specifications. Fits GM V-8 engines with Thunderbolt IV & V HEI ignitions. Voltage Regulator 18-5710 Kit...

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      • Sierra 18-5226 Ignition Wire Replaces 0772584 - Per Foot
        $2.49
        $1.99

        Sierra 18-5226 Hypalon Ignition Wire - Sold by the Foot Sierra high-quality hypalon ignition wire. Sold by the foot. Material: Metallic Core Wire: 7mm Hypalon Interchangeable with: Johnson/Evinrude Outboard 772584 510883

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      • Sierra 18-5438 Ignition Coil Replaces 300-8M0079202
        $65.49
        $45.99

        Ignition Coil for Thunderbolt Mercruiser & Crusader Ignitions Replaces: Crusader 37068 Mercury 392-805570A2, 392-7803A4, 392-7803, 3000-8M0079202, 392-805570A1 Mallory 9-29701 GLM 72115 Pro...

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      • NGK BR6HS Spark Plug
        $4.49
        $3.49

        NGK BR6HS Spark Plug NGK Standard Spark Plugs are proven technology that offer reliable performance. Standard spark plugs are treated with corrosion-resistant plating to ensure ease of installation and removal. The solid copper core offers superior heat...

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      • Sierra 18-8800-1 Wiring Plug Set Replaces 84-816761Q5
        $49.99
        $34.99

        Premium 4cyl Spark Plug Wire Set by Sierra For 4 cylinder engines with conventional ignition systems. Used on Mercruiser and OMC 2.5L and 3.0L marine engines. Kit includes coil wire. Kevlar® core for maximum durability and long life. Durable...

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      • Sierra 18-5268 Tune Up Kit
        $40.99
        $28.99

        Sierra 18-5268 Tune Up Kit  - Delco In-line 4 Single Point For marine engines with Delco In-Line 4 - Single Point distributors Used on Mercruiser, OMC, Crusader and Chris Craft Marine engines. Kit Includes: Contact Set 18-5311 Condenser...

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      • Sierra 18-8810-1 Wiring Plug Set Replaces 84-816761Q16
        $56.49
        $39.49

        Sierra 18-8810-1 Mercruiser Thunderbolt V6 Spark Plug Wire Set Sierra replacement spark plug wire set for Mercruiser Stern Drives. For 6 cylinder engines with Thunderbolt ignition systems. Kit includes coil wire. Kevlar core for maximum durability...

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      • Sierra 18-8821-1 Spark Plug Wiring Plug Set
        $81.49
        $56.99

        Sierra 18-8821-1 Mercruiser Thunderbolt V8 Gen+ Spark Plug Wire Set Sierra replacement engine parts are designed to meet or exceed OEM requirements. This spark wire set is used on Mercruiser engines. Kit includes coil wire. Kevlar core for maximum...

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      • Champion J4C Spark Plugs
        $3.49
        $2.49

        Champion J4C Marine Spark Plug Champion marine spark plugs are quality OEM replacements. The Champion J4C Spark Plug features a copper core electrode that provides increased conductivity and heat control for good overall wear. These marine spark plugs...

        Add to Cart
      • Sierra 18-8802-1 Wiring Plug Set Replaces 84-816761Q12
        $74.49
        $51.99

        Sierra 18-8802-1 Premium 8 Cyl Spark Plug Wire Set For 8 cylinder GM based engines with conventional ignition systems. Key Features: Kit includes coil wire. Kevlar core for maximum durability and long life. Durable stainless steel wound conductor...

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      • Sierra 18-8803-2 Wiring Plug Set Replaces 84-816761Q9
        $67.49
        $46.99

        Sierra 18-8803-2 Premium 8 Cyl Spark Plug Wire Set Sierra 18-8803-2 Premium Spark Plug Wire set is for 8 cylinder engines with conventional ignition systems. Used on Mercruiser and OMC V8 GM and Ford marine engines. Features: Kit includes coil...

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      • Sierra 18-5433 Ignition Coil Replaces 898253T24
        $52.49
        $39.99

        Ignition Coil - Delco Ignitions All engines that use Points and Condenser Distributors Product Details: Use with: High Performance Ignition Coil: 18-5469 For Universal: Atomic Four, Super Sabre Fits: 3.0L (1991 & Up) 5.7 EFI (1996 & Up) 7.4L...

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      • Sierra 18-5275 Tune Up Kit
        $58.99
        $40.99

        Tune Up Kit - Prestolite V8 Single Point Screw Cap For marine V8 engines that use a Prestolite Distributor with a Single Point, Screw Down Cap. Used on Christ Craft, Crusader, Indmar, Pleasurecraft, Mercruiser and OMC marine engines. Kit Includes: ...

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      Mercruiser Ignition Tune Up

      The condition of your Mercruiser ignition system is critical to its performance. Over time your outboard’s electrical components can be effected by wear, corrosion or system leaks. A faulty ignition can scuttle a planned outing on the water, and possibly require an expensive repair. When your Mercruiser is hard to start or will not start, Wholesale Marine offers these suggestions for troubleshooting your ignition system. This procedure enables owners to fault trace if it requires a simple fix or a significant repair.

      When it’s Time to Tune Up Your Mercruiser Ignition System

      1)  First, check the obvious. Is there plenty of gas in the tank? Are all the fluids at the correct levels? Lastly, make sure all the wires are corrosion-free and connected properly. Try to start the engine. A quick fix may be all that it required.

      2)  If there is no start from the engine, a faulty or worn spark plug may be the culprit. Pull the plug and ensure that it is clean. If it is wet, this may be an indication of a bigger issue. If the plug is dry but discolored, it may have been the wrong type of plug for your motor. Check your owner’s manual and install the right plug.

      3)  If the plug is working disconnect the black/yellow wire from the engine to check the kill circuit. If the engine still does not start, the white/green and green/white stator wires need to be replaced. This will impact the engine starting cylinder. If the engine still will not start, the stator is bad and requires replacement.

      When it is time to troubleshoot or tune-up your Mercruiser ignition system, know that Wholesale Marine has everything you need. We offer a competitive pricing guarantee and most items flat rate ship the same day. Returns are stress free and we welcome your questions. Make us your one-stop boating shop! Join our Loyalty Program and use the points toward any future purchases. We’re here to take your call Monday through Friday from 9:00 AM until 6:00 PM EST at (877) 388-2628.