{"product_id":"mitsubishi-a3tr0093-alternator-volvo-penta-3840181-12v-115a","title":"Mitsubishi A3TR0093 Alternator | Volvo Penta 3840181 | 12V 115A","description":"\u003ch2\u003eMitsubishi A3TR0093 Alternator — Volvo Penta 3840181 | 12V 115A\u003c\/h2\u003e\n\n\u003ctable\u003e\n  \u003ctr\u003e\n\u003cth\u003ePart Number\u003c\/th\u003e\n\u003ctd\u003eA3TR0093 \/ A003TR0093\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003cth\u003eBrand\u003c\/th\u003e\n\u003ctd\u003eMitsubishi Electric\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003cth\u003eOfficial Product Type\u003c\/th\u003e\n\u003ctd\u003eMarine Alternator\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003cth\u003eVoltage\u003c\/th\u003e\n\u003ctd\u003e12V\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003cth\u003eOutput\u003c\/th\u003e\n\u003ctd\u003e115A\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003cth\u003eRotation\u003c\/th\u003e\n\u003ctd\u003eClockwise\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003cth\u003ePulley\u003c\/th\u003e\n\u003ctd\u003e6-groove, approx. 47 mm diameter\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003cth\u003eFan\u003c\/th\u003e\n\u003ctd\u003eInternal\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003cth\u003eRegulator\u003c\/th\u003e\n\u003ctd\u003eInternal\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003cth\u003eGround\u003c\/th\u003e\n\u003ctd\u003eNegative\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003cth\u003ePrimary Volvo Penta Cross-Reference\u003c\/th\u003e\n\u003ctd\u003e3840181\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003cth\u003eSystem\u003c\/th\u003e\n\u003ctd\u003e12V Charging System — Marine Diesel\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003cth\u003eSupersedes\u003c\/th\u003e\n\u003ctd\u003eConfirm supersession history with Volvo Penta parts documentation\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003cth\u003eReplaced By\u003c\/th\u003e\n\u003ctd\u003eVerify current production status at time of order\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eOverview\u003c\/h3\u003e\n\u003cp\u003eThe Mitsubishi A3TR0093 is a 12V, 115A marine alternator that crosses directly to Volvo Penta OEM part number 3840181. It is the correct charging unit for selected Volvo Penta D4 and D6 diesel engine applications, and Volvo Penta's own electrical-supply catalog identifies the 3840181 as the 12V \/ 115A alternator for D2-55, D2-75, D4, and D6 configurations. The A3TR0093 features an internal regulator and internal fan, a 6-groove pulley, and clockwise rotation — confirm all identifiers against your existing alternator before ordering.\u003c\/p\u003e\n\n\u003ch3\u003eCompatible Applications\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eVolvo Penta D4-180\u003c\/li\u003e\n  \u003cli\u003eVolvo Penta D4-210\u003c\/li\u003e\n  \u003cli\u003eVolvo Penta D4-225\u003c\/li\u003e\n  \u003cli\u003eVolvo Penta D4-260\u003c\/li\u003e\n  \u003cli\u003eVolvo Penta D4-300\u003c\/li\u003e\n  \u003cli\u003eVolvo Penta D6-280\u003c\/li\u003e\n  \u003cli\u003eVolvo Penta D6-310\u003c\/li\u003e\n  \u003cli\u003eVolvo Penta D6-330\u003c\/li\u003e\n  \u003cli\u003eVolvo Penta D6-350\u003c\/li\u003e\n  \u003cli\u003eVolvo Penta D6-370\u003c\/li\u003e\n  \u003cli\u003eVolvo Penta D6-435\u003c\/li\u003e\n  \u003cli\u003eSelected IPS350 \/ IPS400 \/ IPS500 \/ IPS600 applications\u003c\/li\u003e\n  \u003cli\u003eD2-55 and D2-75 (per Volvo Penta electrical-supply catalog for OEM 3840181)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eFitment note:\u003c\/strong\u003e Related Mitsubishi alternators A3TR0091, A3TR0092, and A3TR0094 may share similar housing dimensions but can differ in pulley type, terminal arrangement, rotation, or OEM application. Confirm the exact part number on your existing alternator before ordering.\u003c\/p\u003e\n\n\u003ch3\u003eTerminal Configuration\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eB+ — M8 × 1.25\u003c\/li\u003e\n  \u003cli\u003eD+ — M4 × 0.7\u003c\/li\u003e\n  \u003cli\u003eW — M5 × 0.8\u003c\/li\u003e\n  \u003cli\u003eS — spade terminal\u003c\/li\u003e\n  \u003cli\u003eB− — M6 × 1.0\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eKit Contents\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e1 × Mitsubishi A3TR0093 alternator assembly\u003c\/li\u003e\n  \u003cli\u003eMounting hardware not included — reuse existing hardware or source separately\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eService Interval\u003c\/h3\u003e\n\u003cp\u003eInspect the alternator at every annual engine service. Replace or rebuild when the charging system shows any of the following:\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eLow or unstable charging voltage\u003c\/li\u003e\n  \u003cli\u003eBattery warning alarms or repeated battery discharge\u003c\/li\u003e\n  \u003cli\u003eInsufficient output under full electrical load\u003c\/li\u003e\n  \u003cli\u003eBearing noise or rough pulley rotation\u003c\/li\u003e\n  \u003cli\u003ePulley or shaft play\u003c\/li\u003e\n  \u003cli\u003eInternal regulator failure\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eBefore replacing the alternator, verify drive belt condition, cable connections, grounds, and battery health — these are common causes of charging faults that do not require alternator replacement.\u003c\/p\u003e\n\n\u003ch3\u003eInstallation Notes\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eDisconnect battery power before removal\u003c\/li\u003e\n  \u003cli\u003eNote terminal positions and wire routing before disconnecting\u003c\/li\u003e\n  \u003cli\u003eConfirm belt alignment and 6-groove pulley compatibility with the existing drive setup\u003c\/li\u003e\n  \u003cli\u003eVerify mounting-ear dimensions and bolt pattern against the original unit\u003c\/li\u003e\n  \u003cli\u003eConfirm clockwise rotation matches the engine drive configuration\u003c\/li\u003e\n  \u003cli\u003eCheck drive belt condition and tension after installation\u003c\/li\u003e\n  \u003cli\u003eTest charging voltage at idle and under load after installation\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eCross-Reference \/ Alternate Part Numbers\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMitsubishi:\u003c\/strong\u003e A3TR0093\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMitsubishi:\u003c\/strong\u003e A003TR0093\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMitsubishi:\u003c\/strong\u003e A3TR0093ZC\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eVolvo Penta (primary OEM):\u003c\/strong\u003e 3840181\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eVolvo Penta (secondary reference):\u003c\/strong\u003e 3803911 — verify applicability; 3840181 is the strongest confirmed Volvo Penta cross-reference to A3TR0093\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLester:\u003c\/strong\u003e 12745\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eArrowhead:\u003c\/strong\u003e 400-48216\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eRelated Parts\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\u003ca href=\"https:\/\/marisolmarine.com\/products\/volvo-penta-alternator-3840181\"\u003eVolvo Penta Alternator 3840181 — OEM equivalent\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"https:\/\/marisolmarine.com\/collections\/volvo-penta-parts\"\u003eBrowse all Volvo Penta Marine Engine Parts\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"https:\/\/marisolmarine.com\/collections\/electrical-accessories\"\u003eElectrical \u0026amp; Accessories\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eTechnical FAQ\u003c\/h3\u003e\n\u003cdl\u003e\n  \u003cdt\u003eIs A3TR0093 a direct replacement for Volvo Penta 3840181?\u003c\/dt\u003e\n  \u003cdd\u003eYes. Mitsubishi A3TR0093 (also listed as A003TR0093) is the direct Mitsubishi Electric cross-reference for Volvo Penta OEM part 3840181. Both are 12V \/ 115A units with a 6-groove pulley and internal regulator.\u003c\/dd\u003e\n\n  \u003cdt\u003eWhat is the difference between A3TR0093 and A003TR0093?\u003c\/dt\u003e\n  \u003cdd\u003eThese are alternate catalog formats for the same Mitsubishi part. A003TR0093 is a longer format used in some cross-reference catalogs; both refer to the same alternator.\u003c\/dd\u003e\n\n  \u003cdt\u003eCan I use A3TR0091 or A3TR0092 instead?\u003c\/dt\u003e\n  \u003cdd\u003eNot without verification. These related Mitsubishi alternators may share housing dimensions but can differ in pulley groove count, terminal arrangement, or rotation direction. Confirm the exact OEM part number before substituting.\u003c\/dd\u003e\n\n  \u003cdt\u003eWhat should I check before replacing the alternator?\u003c\/dt\u003e\n  \u003cdd\u003eCheck drive belt condition and tension, all battery cable connections, ground straps, and battery health. A failing belt, poor ground, or weak battery can cause charging symptoms that mimic alternator failure.\u003c\/dd\u003e\n\n  \u003cdt\u003eDoes this alternator fit twin-engine installations?\u003c\/dt\u003e\n  \u003cdd\u003eEach engine uses its own alternator. On twin-engine boats, confirm the part number for each engine independently, as port and starboard engines may have different alternator configurations depending on the accessory fit.\u003c\/dd\u003e\n\n  \u003cdt\u003eIs 3803911 the same as 3840181?\u003c\/dt\u003e\n  \u003cdd\u003e3803911 appears in some aftermarket cross-reference catalogs alongside A3TR0093, but 3840181 is the primary and most clearly documented Volvo Penta OEM cross-reference. Verify 3803911 applicability against your engine's parts documentation before relying on it as the matching number.\u003c\/dd\u003e\n\u003c\/dl\u003e\n\n\u003chr\u003e\n\u003ch3\u003eParts Desk Insights\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eBest use case:\u003c\/strong\u003e The A3TR0093 is the correct alternator for Volvo Penta D4 and D6 diesel applications where the OEM unit is 3840181. It’s a well-documented aftermarket source for this charging position and is the right choice for boaters looking to replace or upgrade the charging unit on these engine families without sourcing the OEM part directly. The \u003ca href=\"https:\/\/marisolmarine.com\/products\/volvo-penta-alternator-3840181\"\u003eVolvo Penta OEM 3840181\u003c\/a\u003e is also available if OEM sourcing is preferred.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCommon customer questions:\u003c\/strong\u003e The most frequent point of confusion is the 115A rating alone — customers sometimes assume any 12V\/115A alternator will fit. The 6-groove pulley, 47 mm pulley diameter, terminal layout, and Volvo Penta 3840181 cross-reference are what confirm the correct fit. Customers should also note the 3803911 reference: it appears in aftermarket catalogs but 3840181 is the stronger OEM match. If a customer is unsure, ask for the existing alternator part number from the unit itself or from the engine room label.\u003c\/p\u003e","brand":"FVW","offers":[{"title":"Default Title","offer_id":43563794890788,"sku":"A3TR0093","price":265.0,"currency_code":"CAD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0743\/5799\/7604\/files\/ec32cace-0bc5-4f90-ad14-a3a2c6149fa4.png?v=1788724431","url":"https:\/\/marisolmarine.com\/products\/mitsubishi-a3tr0093-alternator-volvo-penta-3840181-12v-115a","provider":"Marisol Marine Company","version":"1.0","type":"link"}