{"product_id":"338-4733a2-mercury-switch-box-genuine-used-part","title":"338-4733A2 Mercury Switch Box | 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: 338-4733A2\n\u003c\/p\u003e\n\u003cp\u003e\n \u003cbr\u003e\n\u003c\/p\u003e\n\u003cp\u003e\n A genuine Mercury switch box used on selected vintage Mercury and Mariner two-cylinder outboard ignition systems. This CDI module controls ignition triggering and coil firing where the original switch-box number, wiring layout and serial range match.\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 switch box \/ CDI module\n\u003c\/p\u003e\n\u003cp\u003e\n • Correct OEM part number 338-4733A2\n\u003c\/p\u003e\n\u003cp\u003e\n • Cross-references with 332-4911A2, 332-4911A5 and 332-4911A8\n\u003c\/p\u003e\n\u003cp\u003e\n • Used on selected Mercury \/ Mariner 20HP and 40HP two-cylinder outboards\n\u003c\/p\u003e\n\u003cp\u003e\n • Match by serial range, wiring colours and ignition-system diagram\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 • 338-4733 Mercury switch box reference\n\u003c\/p\u003e\n\u003cp\u003e\n • 338-4733A2 Mercury switch box reference\n\u003c\/p\u003e\n\u003cp\u003e\n • 332-4911A2 related Mercury switch box reference\n\u003c\/p\u003e\n\u003cp\u003e\n • 332-4911A5 related Mercury switch box reference\n\u003c\/p\u003e\n\u003cp\u003e\n • 332-4911A8 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 • 338-4733A2\n\u003c\/p\u003e\n\u003cp\u003e\n • 3384733A2\n\u003c\/p\u003e\n\u003cp\u003e\n • 338-4733\n\u003c\/p\u003e\n\u003cp\u003e\n • 3384733\n\u003c\/p\u003e\n\u003cp\u003e\n • 332-4911A2\n\u003c\/p\u003e\n\u003cp\u003e\n • 3324911A2\n\u003c\/p\u003e\n\u003cp\u003e\n • 332-4911A5\n\u003c\/p\u003e\n\u003cp\u003e\n • 3324911A5\n\u003c\/p\u003e\n\u003cp\u003e\n • 332-4911A8\n\u003c\/p\u003e\n\u003cp\u003e\n • 3324911A8\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 module\n\u003c\/p\u003e\n\u003cp\u003e\n • Capacitor discharge ignition box\n\u003c\/p\u003e\n\u003cp\u003e\n • Mercury 20HP \/ 40HP switch box\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: 114-4911\n\u003c\/p\u003e\n\u003cp\u003e\n • Sierra: 18-5787\n\u003c\/p\u003e\n\u003cp\u003e\n • Mallory: 9-25105\n\u003c\/p\u003e\n\u003cp\u003e\n • Aftermarket replacement for 338-4733A2 \/ 332-4911A2 \/ 332-4911A5 \/ 332-4911A8\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 20HP and 40HP vintage CDI 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 20HP Model 200 - 1973-1977, serial 3537531 to 4709592\n\u003c\/p\u003e\n\u003cp\u003e\n • Mercury 40HP Model 402 electric start - 1972-1974, serial 3336258 to 3859434\n\u003c\/p\u003e\n\u003cp\u003e\n • Mercury 40HP Model 402 manual start - 1972-1974, serial 3336258 to 4117709\n\u003c\/p\u003e\n\u003cp\u003e\n • Mercury 40HP Model 402 electric start - 1975-1977, serial 4117710 to 4860102\n\u003c\/p\u003e\n\u003cp\u003e\n • Mercury 40HP manual start - 1975-1981, serial-controlled applications up to 5823917\n\u003c\/p\u003e\n\u003cp\u003e\n • Mercury 40HP electric start - 1978-1981, serial 4860103 to 5823917\n\u003c\/p\u003e\n\u003cp\u003e\n • Mercury \/ Mariner 20HP and 40HP ignition systems where the original switch box is 338-4733A2 or 332-4911A-series\n\u003c\/p\u003e\n\u003cp\u003e\n \u003cbr\u003e\n\u003c\/p\u003e\n\u003cp\u003e\n • HP Range: 20HP - 40HP\n\u003c\/p\u003e\n\u003cp\u003e\n • Engine Type: Mercury \/ Mariner two-cylinder two-stroke CDI ignition system\n\u003c\/p\u003e\n\u003cp\u003e\n • Year Range: approximately 1972 - 1981 depending on engine model and start type\n\u003c\/p\u003e\n\u003cp\u003e\n • Serial Note: Match by exact Mercury \/ Mariner serial number, wiring colours, switch-box mounting, trigger\/stator layout and original switch-box number before installation.\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 switch box receives ignition trigger and stator inputs, stores ignition energy and fires the ignition coil at the correct timing point.\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 • Spark on one cylinder only\n\u003c\/p\u003e\n\u003cp\u003e\n • Hard starting\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 • Heat-related ignition failure\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 \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":53392191455524,"sku":"T483521","price":30.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0994\/8115\/7924\/files\/original_994475b1-6a81-47c0-a1bd-6cfe29db4163.jpg?v=1777259185","url":"https:\/\/www.sawleysautoandmarine.com.au\/products\/338-4733a2-mercury-switch-box-genuine-used-part","provider":"Sawley's Auto and Marine","version":"1.0","type":"link"}