{"product_id":"mercury-mercruiser-cap-rotor-kit-805759t05-black-scorpion","title":"Mercury MerCruiser Quicksilver Cap \u0026 Rotor Kit 805759T05 | Black Scorpion Tow Sports","description":"\u003ch2\u003eMercury MerCruiser Quicksilver Cap \u0026amp; Rotor Kit 805759T05\u003c\/h2\u003e\n\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart Number:\u003c\/strong\u003e 805759T05\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Mercury Marine \/ MerCruiser \/ Quicksilver\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOfficial Product Type:\u003c\/strong\u003e Distributor Cap and Rotor Kit\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSystem:\u003c\/strong\u003e Engine ignition — distributor assembly\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGTIN:\u003c\/strong\u003e 745061721159\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSupersedes \/ Replaced By:\u003c\/strong\u003e No confirmed supersession — 805759T05 is current\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eApplication:\u003c\/strong\u003e MerCruiser Black Scorpion Tow Sports and MX 6.2L Black Scorpion Tow Sports engines\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eWhat This Kit Includes\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDistributor cap\u003c\/strong\u003e — PBT\/PET high-strength plastic blend construction with solid brass terminal inserts\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRotor\u003c\/strong\u003e — (reference: \u003cstrong\u003e13524T12\u003c\/strong\u003e as shown in the Black Scorpion distributor diagram)\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eCap gasket\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe cap is designed to resist corrosion, electrical pitting, and radio-frequency interference (RFI). The PBT\/PET construction resists warpage and thermal cracking under marine engine operating conditions.\u003c\/p\u003e\n\n\u003ch2\u003eWhat This Kit Does\u003c\/h2\u003e\n\u003cp\u003eThe Mercury Marine 805759T05 provides the complete primary wear components for the distributor ignition system on MerCruiser Black Scorpion Tow Sports engines. The distributor cap routes high-voltage spark from the coil to each spark plug wire in firing-order sequence via the rotor. Over time the cap terminals erode, carbon tracking develops inside the cap, and the rotor contacts burn — all of which cause misfires, hard starting, and ignition performance loss. Replacing the cap, rotor, and gasket as a kit restores the ignition system to factory specification.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eImportant:\u003c\/strong\u003e This kit is specifically cataloged for \u003cstrong\u003eBlack Scorpion Tow Sports\u003c\/strong\u003e ignition systems. Do not substitute it for other MerCruiser V8 cap-and-rotor kits by displacement alone — confirm by engine serial number and distributor diagram.\u003c\/p\u003e\n\n\u003ch2\u003eCompatible Applications\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMerCruiser Black Scorpion Tow Sports\u003c\/strong\u003e — serial numbers \u003cstrong\u003e0M391600 through 2A460164\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMX 6.2L Black Scorpion Tow Sports\u003c\/strong\u003e — serial numbers \u003cstrong\u003e0M391750 through 2A460138\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eConfirm the engine model and serial number before ordering. This kit is not a direct substitute for other visually similar MerCruiser cap-and-rotor kits.\u003c\/p\u003e\n\n\u003ch2\u003eSerial Number Fitment Notice\u003c\/h2\u003e\n\u003cp\u003eMerCruiser Black Scorpion Tow Sports engines use a specific distributor configuration. Confirm the engine serial number is within the documented ranges above. Related but \u003cstrong\u003enon-interchangeable\u003c\/strong\u003e Mercury kits include:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e805759T3 \/ 805759Q3\u003c\/strong\u003e — GM V8 Thunderbolt IV\/V HEI applications\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e808483K2 \/ 808483Q2\u003c\/strong\u003e — selected GM V8 Delco HEI applications\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e8M0061335\u003c\/strong\u003e — selected 5.0L, 5.7L, and 6.2L MPI ECM 555 applications\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThese kits may appear similar but are not confirmed substitutes for 805759T05 without verifying the ignition system and serial number.\u003c\/p\u003e\n\n\u003ch2\u003eService Interval\u003c\/h2\u003e\n\u003cp\u003eInspect the distributor cap and rotor at every annual service. Replace at the engine manufacturer’s recommended ignition-service interval, or immediately when any of the replacement conditions below are observed. On Tow Sports engines under regular high-load use, proactive replacement at 100-hour intervals is common practice.\u003c\/p\u003e\n\n\u003ch2\u003eWhen to Replace This Kit\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eEngine misfire develops, particularly under load\u003c\/li\u003e\n\u003cli\u003eHard starting or intermittent ignition performance\u003c\/li\u003e\n\u003cli\u003eCarbon tracking is visible on the inside of the cap\u003c\/li\u003e\n\u003cli\u003eCap terminals are corroded or show electrical erosion\u003c\/li\u003e\n\u003cli\u003eRotor contacts are burned or worn\u003c\/li\u003e\n\u003cli\u003eCap is cracked, moisture-damaged, or physically broken\u003c\/li\u003e\n\u003cli\u003eScheduled ignition-system service calls for cap-and-rotor replacement\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eInstallation Notes\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eDisconnect battery power before beginning ignition system service\u003c\/li\u003e\n\u003cli\u003eMark each ignition-wire position on the old cap before removing — preserving firing order is critical\u003c\/li\u003e\n\u003cli\u003eInspect all spark-plug wires and the coil lead for condition before installing the new cap\u003c\/li\u003e\n\u003cli\u003eCompare the new cap and rotor against the removed components to confirm correct fitment\u003c\/li\u003e\n\u003cli\u003eInstall the supplied cap gasket — do not reuse the old gasket\u003c\/li\u003e\n\u003cli\u003eConfirm the rotor seats fully on the distributor shaft before fitting the cap\u003c\/li\u003e\n\u003cli\u003eTransfer ignition leads one at a time from old cap to new cap to preserve firing order\u003c\/li\u003e\n\u003cli\u003eVerify all terminals are fully engaged and the cap retaining clips are secured before startup\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eTechnical FAQ\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eIs 805759T05 the same as 805759T3 or 805759Q3?\u003c\/strong\u003e\u003cbr\u003eNo. These are related Mercury cap-and-rotor kits for different MerCruiser ignition configurations. 805759T3 and Q3 are for GM V8 Thunderbolt IV\/V HEI applications. 805759T05 is specifically cataloged for the Black Scorpion Tow Sports distributor — they are not confirmed interchangeable without serial-number verification.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCan I use 8M0061335 instead of 805759T05 on a Black Scorpion engine?\u003c\/strong\u003e\u003cbr\u003eNo. 8M0061335 is documented for selected 5.0L, 5.7L, and 6.2L MPI ECM 555 applications — not Black Scorpion Tow Sports engines. Always match the kit to the engine serial number and distributor diagram.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat does the PBT\/PET cap construction provide?\u003c\/strong\u003e\u003cbr\u003ePBT\/PET is a high-strength engineering plastic blend used by Mercury for its cap housings. It resists warpage from heat cycling, resists thermal cracking, and is engineered to minimize radio-frequency interference (RFI) from the ignition system — important on boats with onboard electronics.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhy replace the gasket at the same time as the cap and rotor?\u003c\/strong\u003e\u003cbr\u003eThe cap gasket seals the distributor housing against moisture and contamination. A reused gasket may not seal correctly after the cap is removed, allowing condensation inside the distributor — a common cause of ignition misfires in marine environments. This kit includes the gasket to ensure a complete service.\u003c\/p\u003e\n\n\u003ch2\u003eRelated Parts\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"\/products\/8131419668516\"\u003eMercury Distributor Cap \u0026amp; Rotor Kit 811635Q2\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/8131420291108\"\u003eMercury Distributor Cap \u0026amp; Rotor Kit 815407T5\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/8131435790372\"\u003eMercury MerCruiser Distributor Cap \u0026amp; Rotor Kit 898253T28\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/8131419242532\"\u003eMercury Distributor Cap \u0026amp; Rotor Kit 808483K1\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/11167581044772\"\u003eMercury Quicksilver 898253T23 Distributor Cap — MerCruiser 4.3L V6 MPI\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/8131447816228\"\u003eMercury Distributor Rotor 8M6001254\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/11141361827876\"\u003eArco DR001 Distributor Rotor — MerCruiser \/ Volvo Penta \/ OMC GM Module-in-Cap\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/11141361860644\"\u003eArco DR002 Distributor Rotor — MerCruiser \/ Volvo Penta MPI\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eParts Desk Insights\u003c\/h2\u003e\n\u003cp\u003eThe defining characteristic of 805759T05 is its \u003cstrong\u003eBlack Scorpion Tow Sports-specific fitment\u003c\/strong\u003e. Mercury produces several visually similar cap-and-rotor kits for GM-based MerCruiser engines, and selecting the wrong one by displacement alone is the most common ordering error. The serial-number ranges are narrow and specific — if the engine serial falls outside 0M391600–2A460164 (Black Scorpion) or 0M391750–2A460138 (MX 6.2L Black Scorpion), a different kit is required. When servicing the ignition system, use the opportunity to inspect the spark-plug wires and coil lead — on high-use Tow Sports engines, deteriorating plug wires are a frequent companion to cap-and-rotor wear and can cause identical symptoms.\u003c\/p\u003e","brand":"MERC","offers":[{"title":"Default Title","offer_id":43563873796132,"sku":"805759T05","price":119.49,"currency_code":"CAD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0743\/5799\/7604\/files\/5fe7a02f-11e1-43be-97fa-27b912aedb12.png?v=1788756810","url":"https:\/\/marisolmarine.com\/products\/mercury-mercruiser-cap-rotor-kit-805759t05-black-scorpion","provider":"Marisol Marine Company","version":"1.0","type":"link"}