{"product_id":"throttle-position-sensor-3857487-fits-volvo-penta-mercruiser","title":"Throttle Position Sensor 3857487 – Fits Volvo Penta \u0026 MerCruiser","description":"\u003cdiv style=\"margin: 0 0 24px; padding: 24px; background: linear-gradient(135deg, #f5f8fb 0%, #ffffff 100%); border: 2px solid #0b3a63; border-left: 5px solid #0b3a63; border-radius: 12px; box-shadow: 0 4px 12px rgba(11, 58, 99, 0.08);\"\u003e\n  \u003ch2 style=\"margin: 0 0 16px; padding: 0; font-size: 24px; line-height: 1.3; font-weight: 700; color: #132238;\"\u003eHow to Match This Part\u003c\/h2\u003e\n  \u003cp style=\"margin: 0 0 14px; font-size: 16px; line-height: 1.6; color: #132238;\"\u003eThis aftermarket throttle position sensor (TPS) replaces Volvo Penta \/ OMC \u003cstrong style=\"font-weight: 700; color: #132238;\"\u003e3857487\u003c\/strong\u003e and the matching MerCruiser \/ Mercury numbers in the cross-reference below (including \u003cstrong style=\"font-weight: 700; color: #132238;\"\u003e853678T\u003c\/strong\u003e and current \u003cstrong style=\"font-weight: 700; color: #132238;\"\u003e8M0221731\u003c\/strong\u003e). It mounts on the throttle body and reports throttle-shaft angle to the ECM so fuel delivery and spark timing stay coordinated on GM-based marine MPI engines.\u003c\/p\u003e\n  \u003cp style=\"margin: 0 0 14px; font-size: 16px; line-height: 1.6; color: #132238;\"\u003e\n    \u003cstrong style=\"font-weight: 700; color: #132238;\"\u003eMatch this part in this order:\u003c\/strong\u003e\u003cbr\u003e\n    1. \u003cstrong\u003eOEM number on the removed sensor\u003c\/strong\u003e — 3857487 (Volvo Penta \/ OMC) or MerCruiser 853678T \/ 8M0097035 \/ 8M0221731 (Sierra 18-7700 family)\u003cbr\u003e\n    2. \u003cstrong\u003eEngine brand and application\u003c\/strong\u003e — Volvo Penta \/ OMC gasoline 4.3–8.2L, or MerCruiser MCM \/ MIE MPI models listed below (often ECM 555)\u003cbr\u003e\n    3. \u003cstrong\u003ePhysical form\u003c\/strong\u003e — two-hole flange mount, three-wire connector, and a D-shaped throttle-shaft drive with O-ring seal\n  \u003c\/p\u003e\n  \u003cp style=\"margin: 0; font-size: 16px; line-height: 1.6; color: #132238;\"\u003eCompare the flange holes, D-drive, and connector with the product images before ordering. This is \u003cstrong style=\"font-weight: 700; color: #132238;\"\u003enot\u003c\/strong\u003e the MerCruiser 805226A1 (Sierra 18-7630) family or the 803148 Mag \/ Black Scorpion TPS — those are separate listings.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv style=\"margin: 0 0 24px; padding: 24px; background: #ffffff; border: 1px solid #e0e6ed; border-radius: 12px; box-shadow: 0 2px 8px rgba(19, 34, 56, 0.04);\"\u003e\n  \u003ch2 style=\"margin: 0 0 16px; font-size: 24px; font-weight: 700; color: #132238;\"\u003ePart Number Cross-Reference\u003c\/h2\u003e\n  \u003cp style=\"margin: 0 0 14px; font-size: 16px; line-height: 1.6; color: #132238;\"\u003eUse these verified numbers to confirm you have the correct throttle position sensor. Brand names and OEM numbers are for identification only.\u003c\/p\u003e\n  \u003cdiv style=\"margin: 16px 0 0; overflow-x: auto; border: 1px solid #e0e6ed; border-radius: 8px;\"\u003e\n    \u003ctable style=\"width: 100%; min-width: 600px; border-collapse: collapse; font-size: 15px;\"\u003e\n      \u003cthead\u003e\n        \u003ctr style=\"background: #132238; color: #ffffff;\"\u003e\n          \u003cth style=\"padding: 12px 14px; text-align: left; font-weight: 700; font-size: 14px; text-transform: uppercase; border-bottom: 2px solid #0b3a63;\"\u003eType\u003c\/th\u003e\n          \u003cth style=\"padding: 12px 14px; text-align: left; font-weight: 700; font-size: 14px; text-transform: uppercase; border-bottom: 2px solid #0b3a63;\"\u003eBrand\u003c\/th\u003e\n          \u003cth style=\"padding: 12px 14px; text-align: left; font-weight: 700; font-size: 14px; text-transform: uppercase; border-bottom: 2px solid #0b3a63;\"\u003ePart Number\u003c\/th\u003e\n          \u003cth style=\"padding: 12px 14px; text-align: left; font-weight: 700; font-size: 14px; text-transform: uppercase; border-bottom: 2px solid #0b3a63;\"\u003eNotes\u003c\/th\u003e\n        \u003c\/tr\u003e\n      \u003c\/thead\u003e\n      \u003ctbody\u003e\n        \u003ctr\u003e\n          \u003ctd style=\"padding: 12px 14px; border-bottom: 1px solid #e0e6ed;\"\u003e\u003cstrong\u003eOEM\u003c\/strong\u003e\u003c\/td\u003e\n          \u003ctd style=\"padding: 12px 14px; border-bottom: 1px solid #e0e6ed;\"\u003eVolvo Penta \/ OMC\u003c\/td\u003e\n          \u003ctd style=\"padding: 12px 14px; border-bottom: 1px solid #e0e6ed;\"\u003e3857487\u003c\/td\u003e\n          \u003ctd style=\"padding: 12px 14px; border-bottom: 1px solid #e0e6ed;\"\u003ePrimary reference (shared Volvo Penta \/ OMC number)\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr style=\"background: #f5f8fb;\"\u003e\n          \u003ctd style=\"padding: 12px 14px; border-bottom: 1px solid #e0e6ed;\"\u003e\u003cstrong\u003eOEM\u003c\/strong\u003e\u003c\/td\u003e\n          \u003ctd style=\"padding: 12px 14px; border-bottom: 1px solid #e0e6ed;\"\u003eMercury MerCruiser \/ Quicksilver\u003c\/td\u003e\n          \u003ctd style=\"padding: 12px 14px; border-bottom: 1px solid #e0e6ed;\"\u003e853678T\u003c\/td\u003e\n          \u003ctd style=\"padding: 12px 14px; border-bottom: 1px solid #e0e6ed;\"\u003eAlso catalogued as 853678 and 802623; superseded to 8M0221731\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003ctd style=\"padding: 12px 14px; border-bottom: 1px solid #e0e6ed;\"\u003e\u003cstrong\u003eOEM\u003c\/strong\u003e\u003c\/td\u003e\n          \u003ctd style=\"padding: 12px 14px; border-bottom: 1px solid #e0e6ed;\"\u003eMercury MerCruiser \/ Quicksilver\u003c\/td\u003e\n          \u003ctd style=\"padding: 12px 14px; border-bottom: 1px solid #e0e6ed;\"\u003e8M0221731\u003c\/td\u003e\n          \u003ctd style=\"padding: 12px 14px; border-bottom: 1px solid #e0e6ed;\"\u003eCurrent number; supersedes 8M0097035 and 853678T\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr style=\"background: #f5f8fb;\"\u003e\n          \u003ctd style=\"padding: 12px 14px; border-bottom: 1px solid #e0e6ed;\"\u003e\u003cstrong\u003eOEM\u003c\/strong\u003e\u003c\/td\u003e\n          \u003ctd style=\"padding: 12px 14px; border-bottom: 1px solid #e0e6ed;\"\u003eIndmar\u003c\/td\u003e\n          \u003ctd style=\"padding: 12px 14px; border-bottom: 1px solid #e0e6ed;\"\u003e556103\u003c\/td\u003e\n          \u003ctd style=\"padding: 12px 14px; border-bottom: 1px solid #e0e6ed;\"\u003eInterchange OEM number\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003ctd style=\"padding: 12px 14px; border-bottom: 1px solid #e0e6ed;\"\u003e\u003cstrong\u003eOEM\u003c\/strong\u003e\u003c\/td\u003e\n          \u003ctd style=\"padding: 12px 14px; border-bottom: 1px solid #e0e6ed;\"\u003eCrusader\u003c\/td\u003e\n          \u003ctd style=\"padding: 12px 14px; border-bottom: 1px solid #e0e6ed;\"\u003eR020041\u003c\/td\u003e\n          \u003ctd style=\"padding: 12px 14px; border-bottom: 1px solid #e0e6ed;\"\u003eInterchange OEM number\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr style=\"background: #f5f8fb;\"\u003e\n          \u003ctd style=\"padding: 12px 14px; border-bottom: 1px solid #e0e6ed;\"\u003e\u003cstrong\u003eAftermarket\u003c\/strong\u003e\u003c\/td\u003e\n          \u003ctd style=\"padding: 12px 14px; border-bottom: 1px solid #e0e6ed;\"\u003eSierra Marine\u003c\/td\u003e\n          \u003ctd style=\"padding: 12px 14px; border-bottom: 1px solid #e0e6ed;\"\u003e18-7700\u003c\/td\u003e\n          \u003ctd style=\"padding: 12px 14px; border-bottom: 1px solid #e0e6ed;\"\u003eDirect cross-reference\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003ctd style=\"padding: 12px 14px; border-bottom: 1px solid #e0e6ed;\"\u003e\u003cstrong\u003eAftermarket\u003c\/strong\u003e\u003c\/td\u003e\n          \u003ctd style=\"padding: 12px 14px; border-bottom: 1px solid #e0e6ed;\"\u003eMallory Marine\u003c\/td\u003e\n          \u003ctd style=\"padding: 12px 14px; border-bottom: 1px solid #e0e6ed;\"\u003e9-33702\u003c\/td\u003e\n          \u003ctd style=\"padding: 12px 14px; border-bottom: 1px solid #e0e6ed;\"\u003eDirect cross-reference\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr style=\"background: #f5f8fb;\"\u003e\n          \u003ctd style=\"padding: 12px 14px; border-bottom: 1px solid #e0e6ed;\"\u003e\u003cstrong\u003eAftermarket\u003c\/strong\u003e\u003c\/td\u003e\n          \u003ctd style=\"padding: 12px 14px; border-bottom: 1px solid #e0e6ed;\"\u003eCDI Electronics\u003c\/td\u003e\n          \u003ctd style=\"padding: 12px 14px; border-bottom: 1px solid #e0e6ed;\"\u003eE13-0006\u003c\/td\u003e\n          \u003ctd style=\"padding: 12px 14px; border-bottom: 1px solid #e0e6ed;\"\u003eDirect cross-reference\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003ctd style=\"padding: 12px 14px;\"\u003e\u003cstrong\u003eAftermarket\u003c\/strong\u003e\u003c\/td\u003e\n          \u003ctd style=\"padding: 12px 14px;\"\u003eEMP\u003c\/td\u003e\n          \u003ctd style=\"padding: 12px 14px;\"\u003e1300-13600\u003c\/td\u003e\n          \u003ctd style=\"padding: 12px 14px;\"\u003eDirect cross-reference\u003c\/td\u003e\n        \u003c\/tr\u003e\n      \u003c\/tbody\u003e\n    \u003c\/table\u003e\n  \u003c\/div\u003e\n  \u003cp style=\"margin: 14px 0 0; font-size: 16px; line-height: 1.6; color: #132238;\"\u003eThis is an aftermarket part manufactured by JLM Marine. It is not sold as a genuine Volvo Penta, OMC, Mercury, MerCruiser, Quicksilver, Indmar, or Crusader component.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv style=\"margin: 0 0 24px; padding: 24px; background: #ffffff; border: 1px solid #e0e6ed; border-radius: 12px;\"\u003e\n  \u003ch2 style=\"margin: 0 0 16px; font-size: 24px; font-weight: 700; color: #132238;\"\u003eCompatible Engine Models\u003c\/h2\u003e\n  \u003cp style=\"margin: 0 0 14px; font-size: 16px; line-height: 1.6; color: #132238;\"\u003eConfirm brand, displacement, and the original sensor number before ordering. On Volvo Penta and OMC gasoline engines the identification plate is typically on the block or flywheel housing; on MerCruiser sterndrive and inboard engines it is on the block or near the flame-arrestor cover. MerCruiser owners can also cross-check diagrams at \u003ca href=\"https:\/\/jlmmarine.com\/blogs\/diagrams\/mercury-parts-catalog\" target=\"_blank\" rel=\"nofollow noopener\" style=\"color: #0b3a63; text-decoration: underline; font-weight: 600;\"\u003eMercury Parts Diagrams\u003c\/a\u003e. Always match the OEM number and physical form of the sensor you remove.\u003c\/p\u003e\n  \u003cdiv style=\"margin: 16px 0 0; overflow-x: auto; border: 1px solid #e0e6ed; border-radius: 8px;\"\u003e\n    \u003ctable style=\"width: 100%; min-width: 700px; border-collapse: collapse; font-size: 15px;\"\u003e\n      \u003cthead\u003e\n        \u003ctr style=\"background: #132238; color: #ffffff;\"\u003e\n          \u003cth style=\"padding: 12px 14px; text-align: left; font-weight: 700; font-size: 14px;\"\u003eBrand\u003c\/th\u003e\n          \u003cth style=\"padding: 12px 14px; text-align: left; font-weight: 700; font-size: 14px;\"\u003eEngine Model\u003c\/th\u003e\n          \u003cth style=\"padding: 12px 14px; text-align: left; font-weight: 700; font-size: 14px;\"\u003eNotes\u003c\/th\u003e\n        \u003c\/tr\u003e\n      \u003c\/thead\u003e\n      \u003ctbody\u003e\n        \u003ctr\u003e\n          \u003ctd style=\"padding: 12px 14px; border-bottom: 1px solid #e0e6ed;\"\u003eVolvo Penta\u003c\/td\u003e\n          \u003ctd style=\"padding: 12px 14px; border-bottom: 1px solid #e0e6ed;\"\u003e4.3L, 5.0L, 5.7L, 8.1L, 8.2L gasoline\u003c\/td\u003e\n          \u003ctd style=\"padding: 12px 14px; border-bottom: 1px solid #e0e6ed;\"\u003eReplaces 3857487\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr style=\"background: #f5f8fb;\"\u003e\n          \u003ctd style=\"padding: 12px 14px; border-bottom: 1px solid #e0e6ed;\"\u003eOMC Cobra\u003c\/td\u003e\n          \u003ctd style=\"padding: 12px 14px; border-bottom: 1px solid #e0e6ed;\"\u003eGasoline sterndrive applications using 3857487\u003c\/td\u003e\n          \u003ctd style=\"padding: 12px 14px; border-bottom: 1px solid #e0e6ed;\"\u003eSame OEM number as Volvo Penta\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003ctd style=\"padding: 12px 14px; border-bottom: 1px solid #e0e6ed;\"\u003eMerCruiser\u003c\/td\u003e\n          \u003ctd style=\"padding: 12px 14px; border-bottom: 1px solid #e0e6ed;\"\u003eMCM \/ MIE 4.3L MPI; 5.0L MPI\u003c\/td\u003e\n          \u003ctd style=\"padding: 12px 14px; border-bottom: 1px solid #e0e6ed;\"\u003eReplaces 853678T \/ 8M0221731 family\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr style=\"background: #f5f8fb;\"\u003e\n          \u003ctd style=\"padding: 12px 14px; border-bottom: 1px solid #e0e6ed;\"\u003eMerCruiser\u003c\/td\u003e\n          \u003ctd style=\"padding: 12px 14px; border-bottom: 1px solid #e0e6ed;\"\u003eMX 6.2L MPI with ECM 555; 350 Mag MPI\u003c\/td\u003e\n          \u003ctd style=\"padding: 12px 14px; border-bottom: 1px solid #e0e6ed;\"\u003eReplaces 853678T \/ 8M0221731 family\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003ctd style=\"padding: 12px 14px; border-bottom: 1px solid #e0e6ed;\"\u003eMerCruiser\u003c\/td\u003e\n          \u003ctd style=\"padding: 12px 14px; border-bottom: 1px solid #e0e6ed;\"\u003eBlack Scorpion Tow Sports; 377 Scorpion Tow Sports\u003c\/td\u003e\n          \u003ctd style=\"padding: 12px 14px; border-bottom: 1px solid #e0e6ed;\"\u003eReplaces 853678T \/ 8M0221731 family\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr style=\"background: #f5f8fb;\"\u003e\n          \u003ctd style=\"padding: 12px 14px; border-bottom: 1px solid #e0e6ed;\"\u003eMerCruiser\u003c\/td\u003e\n          \u003ctd style=\"padding: 12px 14px; border-bottom: 1px solid #e0e6ed;\"\u003e7.4L MPI (L29); MCM 496 Mag \u0026amp; HO\u003c\/td\u003e\n          \u003ctd style=\"padding: 12px 14px; border-bottom: 1px solid #e0e6ed;\"\u003eReplaces 853678T \/ 8M0221731 family\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003ctd style=\"padding: 12px 14px;\"\u003eMerCruiser\u003c\/td\u003e\n          \u003ctd style=\"padding: 12px 14px;\"\u003eMIE 8.1S \u0026amp; 8.1S HO\u003c\/td\u003e\n          \u003ctd style=\"padding: 12px 14px;\"\u003eReplaces 853678T \/ 8M0221731 family\u003c\/td\u003e\n        \u003c\/tr\u003e\n      \u003c\/tbody\u003e\n    \u003c\/table\u003e\n  \u003c\/div\u003e\n  \u003cp style=\"margin: 14px 0 0; font-size: 15px; line-height: 1.6; color: #5c6b7a;\"\u003eNot for 2006-and-up drive-by-wire throttle systems or LT1 applications. If your stamped number is 805226A1 or 803148, use the listing that matches that number instead.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv style=\"margin: 0 0 24px; padding: 24px; background: #ffffff; border: 1px solid #e0e6ed; border-radius: 12px;\"\u003e\n  \u003ch2 style=\"margin: 0 0 16px; font-size: 24px; font-weight: 700; color: #132238;\"\u003eTechnical Specifications\u003c\/h2\u003e\n  \u003ctable style=\"width: 100%; border-collapse: collapse; font-size: 15px;\"\u003e\n    \u003cthead\u003e\n      \u003ctr style=\"background: #132238; color: #ffffff;\"\u003e\n        \u003cth style=\"padding: 12px 14px; text-align: left; font-weight: 700;\"\u003eSpecification\u003c\/th\u003e\n        \u003cth style=\"padding: 12px 14px; text-align: left; font-weight: 700;\"\u003eValue\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding: 12px 14px; border-bottom: 1px solid #e0e6ed;\"\u003ePart type\u003c\/td\u003e\n        \u003ctd style=\"padding: 12px 14px; border-bottom: 1px solid #e0e6ed;\"\u003eThrottle Position Sensor (TPS)\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"background: #f5f8fb;\"\u003e\n        \u003ctd style=\"padding: 12px 14px; border-bottom: 1px solid #e0e6ed;\"\u003ePrimary OEM replaced\u003c\/td\u003e\n        \u003ctd style=\"padding: 12px 14px; border-bottom: 1px solid #e0e6ed;\"\u003eVolvo Penta \/ OMC 3857487\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding: 12px 14px; border-bottom: 1px solid #e0e6ed;\"\u003eDrive \/ seal\u003c\/td\u003e\n        \u003ctd style=\"padding: 12px 14px; border-bottom: 1px solid #e0e6ed;\"\u003eD-shaped throttle-shaft drive with O-ring seal\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"background: #f5f8fb;\"\u003e\n        \u003ctd style=\"padding: 12px 14px; border-bottom: 1px solid #e0e6ed;\"\u003eConnector\u003c\/td\u003e\n        \u003ctd style=\"padding: 12px 14px; border-bottom: 1px solid #e0e6ed;\"\u003eThree-wire \/ three-terminal sender\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding: 12px 14px; border-bottom: 1px solid #e0e6ed;\"\u003eMounting\u003c\/td\u003e\n        \u003ctd style=\"padding: 12px 14px; border-bottom: 1px solid #e0e6ed;\"\u003eBolt-on throttle-body flange (two mounting holes)\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"background: #f5f8fb;\"\u003e\n        \u003ctd style=\"padding: 12px 14px;\"\u003eEngine systems\u003c\/td\u003e\n        \u003ctd style=\"padding: 12px 14px;\"\u003eGM-based marine MPI \/ multi-port injected sterndrive and inboard engines (not drive-by-wire)\u003c\/td\u003e\n      \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/div\u003e\n\n\u003cdiv style=\"margin: 0 0 24px; padding: 24px; background: #ffffff; border: 1px solid #e0e6ed; border-radius: 12px;\"\u003e\n  \u003ch2 style=\"margin: 0 0 16px; font-size: 24px; font-weight: 700; color: #132238;\"\u003eInstallation Guide\u003c\/h2\u003e\n  \u003col style=\"margin: 0; padding: 0; list-style: none;\"\u003e\n    \u003cli style=\"position: relative; margin: 0 0 14px; padding: 0 0 0 40px; font-size: 16px; line-height: 1.6; color: #132238;\"\u003e\n      \u003cspan style=\"position: absolute; left: 0; top: 0; width: 28px; height: 28px; background: #0b3a63; color: #ffffff; font-size: 14px; font-weight: 700; border-radius: 50%; display: inline-flex; align-items: center; justify-content: center;\"\u003e1\u003c\/span\u003e\n      Disconnect the battery negative cable and let the engine cool. Remove the flame arrestor if it blocks access to the throttle body.\n    \u003c\/li\u003e\n    \u003cli style=\"position: relative; margin: 0 0 14px; padding: 0 0 0 40px; font-size: 16px; line-height: 1.6; color: #132238;\"\u003e\n      \u003cspan style=\"position: absolute; left: 0; top: 0; width: 28px; height: 28px; background: #0b3a63; color: #ffffff; font-size: 14px; font-weight: 700; border-radius: 50%; display: inline-flex; align-items: center; justify-content: center;\"\u003e2\u003c\/span\u003e\n      Unplug the three-wire harness from the old sensor. Note connector routing so the new lead is not strained against the throttle linkage.\n    \u003c\/li\u003e\n    \u003cli style=\"position: relative; margin: 0 0 14px; padding: 0 0 0 40px; font-size: 16px; line-height: 1.6; color: #132238;\"\u003e\n      \u003cspan style=\"position: absolute; left: 0; top: 0; width: 28px; height: 28px; background: #0b3a63; color: #ffffff; font-size: 14px; font-weight: 700; border-radius: 50%; display: inline-flex; align-items: center; justify-content: center;\"\u003e3\u003c\/span\u003e\n      Remove the two mounting screws and lift the sensor off the throttle shaft. Compare old and new side by side: flange holes, D-shaped drive, and connector position must match.\n    \u003c\/li\u003e\n    \u003cli style=\"position: relative; margin: 0 0 14px; padding: 0 0 0 40px; font-size: 16px; line-height: 1.6; color: #132238;\"\u003e\n      \u003cspan style=\"position: absolute; left: 0; top: 0; width: 28px; height: 28px; background: #0b3a63; color: #ffffff; font-size: 14px; font-weight: 700; border-radius: 50%; display: inline-flex; align-items: center; justify-content: center;\"\u003e4\u003c\/span\u003e\n      Align the D-drive with the throttle shaft, seat the sensor fully against the throttle body, then fit the screws and tighten evenly to the torque in your engine service manual. Reuse the original screws unless they are corroded or damaged.\n    \u003c\/li\u003e\n    \u003cli style=\"position: relative; margin: 0 0 14px; padding: 0 0 0 40px; font-size: 16px; line-height: 1.6; color: #132238;\"\u003e\n      \u003cspan style=\"position: absolute; left: 0; top: 0; width: 28px; height: 28px; background: #0b3a63; color: #ffffff; font-size: 14px; font-weight: 700; border-radius: 50%; display: inline-flex; align-items: center; justify-content: center;\"\u003e5\u003c\/span\u003e\n      Reconnect the harness until it locks, refit the flame arrestor, and reconnect the battery. If your service manual specifies a TPS voltage check or idle reset, follow that procedure with a digital multimeter or the manufacturer diagnostic tool.\n    \u003c\/li\u003e\n    \u003cli style=\"position: relative; margin: 0; padding: 0 0 0 40px; font-size: 16px; line-height: 1.6; color: #132238;\"\u003e\n      \u003cspan style=\"position: absolute; left: 0; top: 0; width: 28px; height: 28px; background: #0b3a63; color: #ffffff; font-size: 14px; font-weight: 700; border-radius: 50%; display: inline-flex; align-items: center; justify-content: center;\"\u003e6\u003c\/span\u003e\n      Start the engine, let it idle, and open and close the throttle slowly while checking for smooth response and no stored fault codes.\n    \u003c\/li\u003e\n  \u003c\/ol\u003e\n  \u003cp style=\"margin: 12px 0 0; padding: 12px 14px; background: #f5f8fb; border-left: 3px solid #0b3a63; font-size: 14px; line-height: 1.5; color: #5c6b7a; border-radius: 4px;\"\u003e\u003cstrong\u003eNote:\u003c\/strong\u003e Professional installation is recommended for EFI throttle-body sensors.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv style=\"margin: 0 0 24px; padding: 24px; background: #ffffff; border: 1px solid #e0e6ed; border-radius: 12px;\"\u003e\n  \u003ch2 style=\"margin: 0 0 16px; font-size: 24px; font-weight: 700; color: #132238;\"\u003eTroubleshooting \u0026amp; FAQ\u003c\/h2\u003e\n  \u003cdetails style=\"margin: 0 0 12px; padding: 0; background: #ffffff; border: 1px solid #e0e6ed; border-radius: 8px; overflow: hidden;\"\u003e\n    \u003csummary style=\"display: block; padding: 14px 16px; font-size: 16px; font-weight: 700; color: #132238; cursor: pointer; list-style: none;\"\u003e\n      How do I confirm this is the correct TPS?\n      \u003cspan style=\"float: right; font-size: 20px; color: #0b3a63;\"\u003e+\u003c\/span\u003e\n    \u003c\/summary\u003e\n    \u003cp style=\"margin: 0 16px 14px; font-size: 16px; line-height: 1.6; color: #132238;\"\u003eRead the number on your existing sensor first. If it is Volvo Penta \/ OMC 3857487, MerCruiser 853678T \/ 8M0097035 \/ 8M0221731, Indmar 556103, or a verified Sierra 18-7700 cross, this is the correct replacement for the applications listed above. Compare the D-drive, O-ring seal face, and three-wire connector with the product images.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails style=\"margin: 0 0 12px; padding: 0; background: #ffffff; border: 1px solid #e0e6ed; border-radius: 8px; overflow: hidden;\"\u003e\n    \u003csummary style=\"display: block; padding: 14px 16px; font-size: 16px; font-weight: 700; color: #132238; cursor: pointer; list-style: none;\"\u003e\n      Will this replace MerCruiser 805226A1 or 803148?\n      \u003cspan style=\"float: right; font-size: 20px; color: #0b3a63;\"\u003e+\u003c\/span\u003e\n    \u003c\/summary\u003e\n    \u003cp style=\"margin: 0 16px 14px; font-size: 16px; line-height: 1.6; color: #132238;\"\u003eNo. 805226A1 (Sierra 18-7630) and 803148 \/ 8M0230659 (later Mag \/ Black Scorpion applications) are different MerCruiser TPS families. Order the listing that matches the number stamped on your removed sensor.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails style=\"margin: 0 0 12px; padding: 0; background: #ffffff; border: 1px solid #e0e6ed; border-radius: 8px; overflow: hidden;\"\u003e\n    \u003csummary style=\"display: block; padding: 14px 16px; font-size: 16px; font-weight: 700; color: #132238; cursor: pointer; list-style: none;\"\u003e\n      What symptoms point to a failing throttle position sensor?\n      \u003cspan style=\"float: right; font-size: 20px; color: #0b3a63;\"\u003e+\u003c\/span\u003e\n    \u003c\/summary\u003e\n    \u003cp style=\"margin: 0 16px 14px; font-size: 16px; line-height: 1.6; color: #132238;\"\u003eCommon signs include rough or hunting idle, hesitation when the throttle opens, poor throttle response, and engine fault codes related to throttle position. Confirm the fault by testing before replacing the sensor — wiring and connector problems can produce the same symptoms.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails style=\"margin: 0; padding: 0; background: #ffffff; border: 1px solid #e0e6ed; border-radius: 8px; overflow: hidden;\"\u003e\n    \u003csummary style=\"display: block; padding: 14px 16px; font-size: 16px; font-weight: 700; color: #132238; cursor: pointer; list-style: none;\"\u003e\n      Is this an OEM or aftermarket part?\n      \u003cspan style=\"float: right; font-size: 20px; color: #0b3a63;\"\u003e+\u003c\/span\u003e\n    \u003c\/summary\u003e\n    \u003cp style=\"margin: 0 16px 14px; font-size: 16px; line-height: 1.6; color: #132238;\"\u003eThis is an aftermarket replacement manufactured by JLM Marine. It is not a genuine Volvo Penta, OMC, Mercury, MerCruiser, or Quicksilver part. OEM and aftermarket numbers are listed only for cross-matching.\u003c\/p\u003e\n  \u003c\/details\u003e\n\u003c\/div\u003e\n\n\u003cdiv style=\"margin: 0 0 24px; padding: 24px; background: #ffffff; border: 1px solid #e0e6ed; border-radius: 12px;\"\u003e\n  \u003ch2 style=\"margin: 0 0 16px; font-size: 24px; font-weight: 700; color: #132238;\"\u003eImportant Notes\u003c\/h2\u003e\n  \u003cul style=\"margin: 0; padding: 0 0 0 24px; font-size: 16px; line-height: 1.6; color: #132238;\"\u003e\n    \u003cli style=\"margin: 0 0 8px;\"\u003eMatch the OEM number and the physical form of your original sensor before ordering. A different connector or drive shape means a different part.\u003c\/li\u003e\n    \u003cli style=\"margin: 0 0 8px;\"\u003eNot for 2006-and-up drive-by-wire systems or LT1 applications. Not for MerCruiser 805226A1 or 803148 TPS families.\u003c\/li\u003e\n    \u003cli style=\"margin: 0 0 8px;\"\u003eThis is an aftermarket part. Brand names and part numbers are for reference only.\u003c\/li\u003e\n    \u003cli style=\"margin: 0;\"\u003e\n\u003cspan style=\"color: #d32f2f; font-weight: 700;\"\u003eProfessional installation is recommended\u003c\/span\u003e for EFI throttle-body sensors.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/div\u003e\n\n\u003cdiv style=\"margin: 0; padding: 24px; background: #ffffff; border: 1px solid #e0e6ed; border-radius: 12px;\"\u003e\n  \u003ch2 style=\"margin: 0 0 16px; font-size: 24px; font-weight: 700; color: #132238;\"\u003eWhy Choose JLM MARINE?\u003c\/h2\u003e\n  \u003cul style=\"margin: 0; padding: 0 0 0 24px; font-size: 16px; line-height: 1.6; color: #132238;\"\u003e\n    \u003cli style=\"margin: 0 0 8px;\"\u003e\n\u003cstrong style=\"font-weight: 700;\"\u003ePrecision Fit:\u003c\/strong\u003e Cross-referenced to Volvo Penta \/ OMC 3857487 and the MerCruiser 853678T \/ 8M0221731 (Sierra 18-7700) family for the MPI applications listed above.\u003c\/li\u003e\n    \u003cli style=\"margin: 0 0 8px;\"\u003e\n\u003cstrong style=\"font-weight: 700;\"\u003eQuality Control:\u003c\/strong\u003e Each batch is inspected for dimensional consistency and workmanship.\u003c\/li\u003e\n    \u003cli style=\"margin: 0;\"\u003e\n\u003cstrong style=\"font-weight: 700;\"\u003eDirect from Manufacturer:\u003c\/strong\u003e Aftermarket marine sensors engineered for reliable throttle-position feedback on GM-based marine MPI systems.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/div\u003e","brand":"JLM Marine","offers":[{"title":"Default Title","offer_id":51981004636473,"sku":"23PS377","price":55.77,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0885\/0433\/6697\/files\/A81649595573b4a5ab7c80860f148f50bf.webp?v=1772455201","url":"https:\/\/jlmmarine.com\/products\/throttle-position-sensor-3857487-fits-volvo-penta-mercruiser","provider":"JLM Marine Boat Parts Limited","version":"1.0","type":"link"}