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      Mercruiser Ignition System Product Listings

      • Key 2B , Mercury - Mercruiser 89491-8
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        $5.99
        $4.99

        Mercury-MerCruiser 89491-8 Replacement Ignition Key - 2B The Mercury-MerCruiser 89491-8 Replacement Ignition Key is a replacement key for compatible Mercury and MerCruiser ignition switches. This...

      • Sierra 18-5352 Distributor Cap Replaces 392-9766Q1
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        $39.19
        $28.29

        Sierra 18-5352 Distributor Cap Replaces 392-9766Q1 Features: For Prestolite Fits Ford & GM V-8 Engines with Prestolite Conventional Ignition Replaces: Volvo - 841070,...

      • Sierra 18-5116-1 Ignition Sensor Replaces 87-892150Q02
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        $105.89
        $76.19

        Sierra 18-5116-1 MerCruiser V6/V8 Ignition Sensor For: V-6 & V-8 with Thunderbolt ignition (1981-1997) nut connectors. Interchangeable...

      • Sierra 18-8803-2 Wiring Plug Set Replaces 84-816761Q9
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        $81.69
        $58.89

        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...

      • Sierra 18-5280 Tune Up Kit Replaces 811635Q2
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        $26.69
        $19.19

        Sierra 18-5280 Tune Up Kit for MerCruiser and OMC Stern Drives Sierra high-quality replacement parts are designed to meet OEM specifications.  Features: In-Line 4 Delco EST Use with: Delco HEI...

      • Sierra 18-5281 Tune Up Kit Replaces 808483Q2
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        $61.59
        $44.29

        Sierra 18-5281 Tune Up Kit Delco Est V8 Used on MerCruiser, Indmar and Pleasurecraft Marine engines. GM V-8 Delco EST Fits 1996-2005 Indmar Monsoon, MCX, RPT & Hammerhead...

      • Champion RV9YC Spark Plug
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        $3.99
        $2.99

        Champion RV9YC Marine Spark Plug Champion marine spark plugs are quality OEM replacements. The Champion RV9YC Spark Plug features a copper core electrode that provides increased conductivity and...

      • Champion RV91MC Spark Plugs
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        $3.99
        $2.99

        Champion RV91MC Marine Spark Plug Champion marine spark plugs are quality OEM replacements. The Champion RV91MC Spark Plug features a copper core electrode that provides increased conductivity and...

      • Sierra 18-5274 Tune Up Kit
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        $48.99
        $35.19

        MerCruiser Tune Up Kit for V6 Thunderbolt HEI Ignitions For Mercury Thunderbolt HEI V-6 Kit Includes: Rotor 18-5432 Distributor Cap 18-5396 Gasket Interchangeable...

      • Sierra 18-5354 Distributor Cap
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        $43.69
        $31.39

        Sierra 18-5354 Distributor Cap - Delco V8 Ignitions Sierra 18-5354 Distributor Cap fits new GM style "module in cap" distributors with V-8 applications except MPI engines with ECM 555. Use...

      • Sierra 18-5395 Distributor Cap Replaces 805759T1
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        $57.09
        $41.09

        Sierra 18-5395 Distributor Cap Replaces 805759T1 Includes Gasket Replaces: Mercrusier 16457A4,805759T2,805759T1,...

      • Sierra 18-5405 Rotor Replaces 8M6001253
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        $17.69
        $12.69

        Sierra 18-5405 V8 Rotor V-8 Fits New GM Style "Module In Cap" Interchangeable...

      • Mercury - Mercruiser 89491-7 Key 2A
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        $5.99
        $4.99

        Mercury-MerCruiser 89491-7 Replacement Ignition Key - 2A The Mercury-MerCruiser 89491-7 Replacement Ignition Key is a replacement key for compatible Mercury and MerCruiser ignition switches. This...

      • Cap & Rotor Kit, Mercury - Mercruiser 805759T-3
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        $68.39
        $56.99

        Mercury-MerCruiser 805759T3 Cap and Rotor Kit for GM V8 Engines The Mercury-MerCruiser 805759T3 Cap and Rotor Kit is a genuine replacement ignition service kit for marinized General Motors V8...

      • Cap & Rotor Kit, Mercury - Mercruiser 805759Q-3 Image
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        $62.39
        $51.99

        Quicksilver 805759Q3 Distributor Cap Kit For GM V8 MerCruiser Engines With Thunderbolt IV & V Quicksilver 805759Q3 Distributor Cap Kit is designed for GM V8 MerCruiser engines equipped with...

      • Sierra 18-5432 Rotor Assembly Replaces 13524A6
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        $16.39
        $12.79

        Sierra 18-5432 Mercruiser V-6 Rotor Assembly Sierra high-quality engine parts are designed to meet OEM speficiations. Fits GM V-6 engines with Thunderbolt IV & V HEI Ignition. Interchangeable...

      • Champion RV12YC Spark Plugs
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        $3.99
        $2.99

        Champion RV12YC Copper Plus Marine Spark Plug Champion marine spark plugs are quality OEM replacements. The Champion RV12YC Spark Plug features a copper core electrode that provides increased...

      • Sierra 18-5250 Tune Up Kit Replaces 34235Q1
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        $32.19
        $23.19

        Tune Up Kit - Delco 4 & 6 Cylinder Kit Includes: Sie-18-53111 Contact Set Sie-18-5345 Condenser Sie-18-5418 Rotor   Replaces: OMC - 0176371,5006182 Mallory - 9-29300 Johnson/Evinrude -...

      • Sierra 18-8801-1 Wiring Plug Set Replaces 84-816761Q7
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        $82.59
        $64.49

        Sierra 18-8801-1 Premium 6 Cyl. Spark Plug Wire Set For 6 cylinder GM based engines with conventional ignition systems. Features: Kit includes coil wire. Kevlar core for maximum durability and...

      • Sierra Marine Distributor Cap - 18-5385
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        $25.99
        $18.69

        Sierra 18-5385 Distributor Cap - Delco 4 Cyl Ignitions Sierra distributor caps are designed to meet OEM specifications. For GM 4 cyl marine engines using a Delco conventional ignition distributor...

      Mercruiser OEM Engine Parts Finder

      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 Wholesale Rewards 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.