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Parts Selection Guide

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Mercruiser Tune Up Kit

Mercruiser Ignition Coils

Mercruiser Spark Plug Wires

Mercruiser Spark Plugs

Mercruiser Ignition Modules

Mercruiser Electronic Conversion Kits

Mercruiser Distributors

      Mercruiser Ignition System

      • Sierra 18-8802-1 Wiring Plug Set Replaces 84-816761Q12
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        Sierra 18-8802-1 Wiring Plug Set Replaces 84-816761Q12

        $78.49
        $54.99

        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 18-5433 Ignition Coil Replaces 898253T24
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        Sierra 18-5433 Ignition Coil Replaces 898253T24

        $56.99
        $43.49

        Sierra 18-5433 Ignition Coil Sierra replacement ignition coil. All Sierra aftermarket parts are manufactured to meet or exceed OEM requirements. Fits: MCM 4 Cyl., V-6 & V-8 Engines With Conventional Ignition & Some Outboard Applications For...

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      • Sierra 18-5275 Tune Up Kit
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        Sierra 18-5275 Tune Up Kit

        $61.99
        $43.49

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

        $70.99
        $49.99

        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 18-5116-1 Ignition Sensor Replaces 87-892150Q02
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        Sierra 18-5116-1 Ignition Sensor Replaces 87-892150Q02

        $90.99
        $63.49

        Sierra Ignition Sensor Kit for Mercruiser For: V-6 & V-8 with Thunderbolt ignition (1981-1997) nut connectors. Replaces: Mercury 87-892150Q02, 87-892150K02  Mercruiser 87-861780A2, 87-8611780Q4, 87-892150A02, 87-892150Q02, 87-91019A6,...

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      • Sierra 18-5352 Distributor Cap Replaces 392-9766Q1
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        Sierra 18-5352 Distributor Cap Replaces 392-9766Q1

        $33.49
        $23.49

        Sierra 18-5352 Distributor Cap Replaces 392-9766Q1 Replaces: Volvo - 841070, 3853815 Johnson/Evinrude - 984401 OMC - 0984401,3853815 Mercrusier - 392-9766Q1, 392-9766, 392-9766T, FI6900185 Pleasure Craft - RA108003 Crusader - 41076 Chrysler -...

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      • Sierra 18-5443 Ignition Coil Replaces 898253T27
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        Sierra 18-5443 Ignition Coil Replaces 898253T27

        $116.99
        $81.99

        Sierra 18-5443 Ignition Coil Sierra 18-5443 Ignition Coil is a replacement part for Mercruiser, OMC, and Volvo Penta Sterndrives. All Sierra aftermarket parts are manufactured to meet or exceed OEM requirements. Fits: 4 Cyl., GM V-6 & V-8 Engines...

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      • Sierra 18-5280 Tune Up Kit Replaces 811635Q2
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        Sierra 18-5280 Tune Up Kit Replaces 811635Q2

        $23.49
        $16.49

        Sierra 18-5280 Tune Up Kit for Mercruiser and OMC Stern Drives Sierra high-quality replacement parts are designed to meet OEM specifications.  In-Line 4 Delco EST Kit Includes: (1) 18-5361 Distributor Cap (1) 18-5406...

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      • Champion RV9YC Spark Plug
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        Champion RV9YC Spark Plugs

        $3.49
        $2.49

        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 heat control for good overall wear. These marine spark...

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      • Sierra 18-8828-1 Wiring Plug Set Replaces 84-863656A1
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        Sierra 18-8828-1 Wiring Plug Set Replaces 84-863656A1

        $129.99
        $90.99

        Sierra 18-8828-1 Wiring Plug Set For Mercruiser 5.0L MIE MPI V8 with Delco HEI ignition system. Sierra replacement engine parts are manufactured to meet or exceed OEM requirements. Ignition Type: Delco HEI Wire Lengths: (2) Spark Plug Wires...

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      • Sierra 18-5274 Tune Up Kit
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        Sierra 18-5274 Tune Up Kit

        $42.99
        $29.99

        Mercruiser Tune Up Kit for V6 Thunderbolt HEI Ignitions Kit Includes: Rotor 18-5432 Distributor Cap 18-5396 Gasket  Replaces: Mercury 815407Q 5, 815407T5 Pro...

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      • Champion RV91MC Spark Plugs
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        Champion RV91MC Spark Plugs

        $3.49
        $2.49

        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 heat control for good overall wear. These marine spark...

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      • NGK ITR4A15 Spark Plug
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        NGK ITR4A15 Spark Plug

        $15.49
        $10.99

        NGK ITR4A15 Spark Plug NGK Laser Iridium spark plugs offer the best combination of performance and longevity. The iridium tipped center electrode provides durability six times harder than platinum. NGK's high-grade pure alumina ceramic and 98% pure...

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      • Sierra 18-5281 Tune Up Kit Replaces 808483Q2
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        Sierra 18-5281 Tune Up Kit Replaces 808483Q2

        $53.99
        $37.99

        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 Engines Contains: 18-5354 Distributor Cap 18-5405...

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      • Cap & Rotor Kit, Mercury - Mercruiser 805759Q-3
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        Cap & Rotor Kit, Quicksilver 805759Q-3

        $59.99
        $49.99

        Cap & Rotor Kit, Mercury - Mercruiser 805759T-3 Fits GM V-8 engines with Thunderbolt IV and V HEI ignitions Replaces: GLM 71780 Mallory 9-29350 Sierra 18-5273 Mercury 805759T-3  

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      • Sierra 18-5247 Tune Up Kit Replaces 8M0061335
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        Sierra 18-5247 Tune Up Kit Replaces 8M0061335

        $115.99
        $80.99

        Sierra 18-5247 Tune Up Kit for Mercruiser V8 Stern Drives Sierra high-quality engine parts are designed to meet OEM specifications. For late model V-8 (Alpha/Bravo 350 Mag. 5.0L, 5.7L & 6.2L MPI engines w/ ECM 555 s/n 0M300000 & Up) Kit...

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      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 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.