{"product_id":"7452a21-mercury-cdi-genuine-used-part","title":"7452A21 Mercury CDI | Genuine Used Part","description":"\u003cp\u003e\n 🔧 Product Description\n\u003c\/p\u003e\n\u003cp\u003e\n \u003cbr\u003e\n\u003c\/p\u003e\n\u003cp\u003e\n Genuine Mercury Switch Box \/ CDI Module - Part Number: 339-7452A21\n\u003c\/p\u003e\n\u003cp\u003e\n \u003cbr\u003e\n\u003c\/p\u003e\n\u003cp\u003e\n A genuine Mercury ignition switch box \/ CDI module used on selected Mercury and Mariner 2-cylinder two-stroke outboards. This bullet-connector ignition module controls spark triggering from the stator and trigger circuits to the ignition coils.\n\u003c\/p\u003e\n\u003cp\u003e\n \u003cbr\u003e\n\u003c\/p\u003e\n\u003cp\u003e\n ⚙️ Key Features\n\u003c\/p\u003e\n\u003cp\u003e\n \u003cbr\u003e\n\u003c\/p\u003e\n\u003cp\u003e\n • Genuine Mercury CDI \/ switch box\n\u003c\/p\u003e\n\u003cp\u003e\n • Correct Mercury part number 339-7452A21\n\u003c\/p\u003e\n\u003cp\u003e\n • Bullet-connector ignition pack\n\u003c\/p\u003e\n\u003cp\u003e\n • Used on selected 6HP to 35HP 2-cylinder Mercury \/ Mariner two-stroke outboards\n\u003c\/p\u003e\n\u003cp\u003e\n • Cross-references with CDI Electronics 114-7452K1 and Sierra 18-5776 style replacements\n\u003c\/p\u003e\n\u003cp\u003e\n \u003cbr\u003e\n\u003c\/p\u003e\n\u003cp\u003e\n 🔄 Supersession \u0026amp; Cross Reference\n\u003c\/p\u003e\n\u003cp\u003e\n \u003cbr\u003e\n\u003c\/p\u003e\n\u003cp\u003e\n OEM Supersession Chain:\n\u003c\/p\u003e\n\u003cp\u003e\n \u003cbr\u003e\n\u003c\/p\u003e\n\u003cp\u003e\n • 339-7452A21 later Mercury switch box reference\n\u003c\/p\u003e\n\u003cp\u003e\n • 339-7452A20 earlier related Mercury switch box reference\n\u003c\/p\u003e\n\u003cp\u003e\n • 339-7452A19 earlier related Mercury switch box reference\n\u003c\/p\u003e\n\u003cp\u003e\n • 339-7452A18 earlier related Mercury switch box reference\n\u003c\/p\u003e\n\u003cp\u003e\n • 339-7452A15 earlier related Mercury switch box reference\n\u003c\/p\u003e\n\u003cp\u003e\n • 339-7452A14 earlier related Mercury switch box reference\n\u003c\/p\u003e\n\u003cp\u003e\n • 339-7452A13 earlier related Mercury switch box reference\n\u003c\/p\u003e\n\u003cp\u003e\n • 339-7452A11 earlier related Mercury switch box reference\n\u003c\/p\u003e\n\u003cp\u003e\n • 339-7452A10 earlier related Mercury switch box reference\n\u003c\/p\u003e\n\u003cp\u003e\n • 339-7452A9 earlier related Mercury switch box reference\n\u003c\/p\u003e\n\u003cp\u003e\n • 339-7452A8 earlier related Mercury switch box reference\n\u003c\/p\u003e\n\u003cp\u003e\n • 339-7452A7 earlier related Mercury switch box reference\n\u003c\/p\u003e\n\u003cp\u003e\n • 339-7452A1 earlier related Mercury switch box reference\n\u003c\/p\u003e\n\u003cp\u003e\n \u003cbr\u003e\n\u003c\/p\u003e\n\u003cp\u003e\n OEM \/ Related Numbers:\n\u003c\/p\u003e\n\u003cp\u003e\n \u003cbr\u003e\n\u003c\/p\u003e\n\u003cp\u003e\n • 339-7452A21\n\u003c\/p\u003e\n\u003cp\u003e\n • 7452A21\n\u003c\/p\u003e\n\u003cp\u003e\n • 3397452A21\n\u003c\/p\u003e\n\u003cp\u003e\n • 339-7452A20\n\u003c\/p\u003e\n\u003cp\u003e\n • 339-7452A19\n\u003c\/p\u003e\n\u003cp\u003e\n • 339-7452A18\n\u003c\/p\u003e\n\u003cp\u003e\n • 339-7452A15\n\u003c\/p\u003e\n\u003cp\u003e\n • 339-7452A14\n\u003c\/p\u003e\n\u003cp\u003e\n • 339-7452A13\n\u003c\/p\u003e\n\u003cp\u003e\n • 339-7452A11\n\u003c\/p\u003e\n\u003cp\u003e\n • 339-7452A10\n\u003c\/p\u003e\n\u003cp\u003e\n • 339-7452A9\n\u003c\/p\u003e\n\u003cp\u003e\n • 339-7452A8\n\u003c\/p\u003e\n\u003cp\u003e\n • 339-7452A7\n\u003c\/p\u003e\n\u003cp\u003e\n • 339-7452A1\n\u003c\/p\u003e\n\u003cp\u003e\n • Switch box\n\u003c\/p\u003e\n\u003cp\u003e\n • CDI module\n\u003c\/p\u003e\n\u003cp\u003e\n • Ignition pack\n\u003c\/p\u003e\n\u003cp\u003e\n \u003cbr\u003e\n\u003c\/p\u003e\n\u003cp\u003e\n Aftermarket \/ Verified Equivalents:\n\u003c\/p\u003e\n\u003cp\u003e\n \u003cbr\u003e\n\u003c\/p\u003e\n\u003cp\u003e\n • CDI Electronics: 114-7452K1\n\u003c\/p\u003e\n\u003cp\u003e\n • Sierra: 18-5776\n\u003c\/p\u003e\n\u003cp\u003e\n \u003cbr\u003e\n\u003c\/p\u003e\n\u003cp\u003e\n 🚤 Compatibility\n\u003c\/p\u003e\n\u003cp\u003e\n \u003cbr\u003e\n\u003c\/p\u003e\n\u003cp\u003e\n Commonly used on:\n\u003c\/p\u003e\n\u003cp\u003e\n \u003cbr\u003e\n\u003c\/p\u003e\n\u003cp\u003e\n • Mercury \/ Mariner 2-cylinder two-stroke bullet-connector ignition systems\n\u003c\/p\u003e\n\u003cp\u003e\n \u003cbr\u003e\n\u003c\/p\u003e\n\u003cp\u003e\n Typically suits:\n\u003c\/p\u003e\n\u003cp\u003e\n \u003cbr\u003e\n\u003c\/p\u003e\n\u003cp\u003e\n • Engine models:\n\u003c\/p\u003e\n\u003cp\u003e\n • Mercury 6HP 2-cylinder - 1980-1997\n\u003c\/p\u003e\n\u003cp\u003e\n • Mercury 8HP 2-cylinder - 1980-1997\n\u003c\/p\u003e\n\u003cp\u003e\n • Mercury 9.9HP 2-cylinder - 1980-1997\n\u003c\/p\u003e\n\u003cp\u003e\n • Mercury 10HP 2-cylinder - 1980-1997\n\u003c\/p\u003e\n\u003cp\u003e\n • Mercury 15HP 2-cylinder - 1980-1997\n\u003c\/p\u003e\n\u003cp\u003e\n • Mercury 18HP 2-cylinder - 1980-1997\n\u003c\/p\u003e\n\u003cp\u003e\n • Mercury 20HP 2-cylinder - 1980-1997\n\u003c\/p\u003e\n\u003cp\u003e\n • Mercury 25HP 2-cylinder - 1980-1997\n\u003c\/p\u003e\n\u003cp\u003e\n • Mercury 35HP 2-cylinder - 1980-1997\n\u003c\/p\u003e\n\u003cp\u003e\n • Mariner 6HP 2-cylinder - 1980-1997\n\u003c\/p\u003e\n\u003cp\u003e\n • Mariner 8HP 2-cylinder - 1980-1997\n\u003c\/p\u003e\n\u003cp\u003e\n • Mariner 9.9HP 2-cylinder - 1980-1997\n\u003c\/p\u003e\n\u003cp\u003e\n • Mariner 10HP 2-cylinder - 1980-1997\n\u003c\/p\u003e\n\u003cp\u003e\n • Mariner 15HP 2-cylinder - 1980-1997\n\u003c\/p\u003e\n\u003cp\u003e\n • Mariner 18HP 2-cylinder - 1980-1997\n\u003c\/p\u003e\n\u003cp\u003e\n • Mariner 20HP 2-cylinder - 1980-1997\n\u003c\/p\u003e\n\u003cp\u003e\n • Mariner 25HP 2-cylinder - 1980-1997\n\u003c\/p\u003e\n\u003cp\u003e\n • Mariner 35HP 2-cylinder - 1980-1997\n\u003c\/p\u003e\n\u003cp\u003e\n \u003cbr\u003e\n\u003c\/p\u003e\n\u003cp\u003e\n • HP Range: 6HP - 35HP\n\u003c\/p\u003e\n\u003cp\u003e\n • Engine Type: Mercury \/ Mariner 2-cylinder two-stroke outboard ignition system\n\u003c\/p\u003e\n\u003cp\u003e\n • Year Range: approximately 1980 - 1997\n\u003c\/p\u003e\n\u003cp\u003e\n • Serial Note: Match by engine serial number, bullet-connector pack layout and original switch-box number.\n\u003c\/p\u003e\n\u003cp\u003e\n \u003cbr\u003e\n\u003c\/p\u003e\n\u003cp\u003e\n 🔌 Function\n\u003c\/p\u003e\n\u003cp\u003e\n \u003cbr\u003e\n\u003c\/p\u003e\n\u003cp\u003e\n The CDI \/ switch box stores and releases ignition energy to trigger spark at the correct timing point for the ignition coils.\n\u003c\/p\u003e\n\u003cp\u003e\n \u003cbr\u003e\n\u003c\/p\u003e\n\u003cp\u003e\n Common signs of failure:\n\u003c\/p\u003e\n\u003cp\u003e\n \u003cbr\u003e\n\u003c\/p\u003e\n\u003cp\u003e\n • No spark\n\u003c\/p\u003e\n\u003cp\u003e\n • Weak or intermittent spark\n\u003c\/p\u003e\n\u003cp\u003e\n • Engine starts then loses spark\n\u003c\/p\u003e\n\u003cp\u003e\n • Misfire under load\n\u003c\/p\u003e\n\u003cp\u003e\n • Spark returns when a known-good switch box is fitted\n\u003c\/p\u003e\n\u003cp\u003e\n • Heat-related ignition failure\n\u003c\/p\u003e\n\u003cp\u003e\n • Damaged or corroded bullet connectors\n\u003c\/p\u003e\n\u003cp\u003e\n \u003cbr\u003e\n\u003c\/p\u003e\n\u003cp\u003e\n 📦 Condition\n\u003c\/p\u003e\n\u003cp\u003e\n \u003cbr\u003e\n\u003c\/p\u003e\n\u003cp\u003e\n • Genuine used part\n\u003c\/p\u003e\n\u003cp\u003e\n • Removed from running engine where applicable\n\u003c\/p\u003e\n\u003cp\u003e\n • In good working condition unless otherwise stated\n\u003c\/p\u003e\n","brand":"Sawley's Auto and Marine","offers":[{"title":"Default Title","offer_id":53388209258788,"sku":"360572Z","price":60.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0994\/8115\/7924\/files\/original_e7eb5810-c21a-47e3-9cab-366f8da2f3c4.jpg?v=1777212898","url":"https:\/\/www.sawleysautoandmarine.com.au\/products\/7452a21-mercury-cdi-genuine-used-part","provider":"Sawley's Auto and Marine","version":"1.0","type":"link"}