{"product_id":"raw-water-pump-fits-northern-lights-6kw-and-under-series-generators-replaces-25-12007-145016820-25-18305","title":"Raw Water Pump – Fits Northern Lights 6KW and Under Series Generators (Replaces 25-12007, 145016820, 25-18305)","description":"\u003c!-- 🔧 Table Styles (include only once per page) --\u003e\n\u003cstyle\u003e\n  \/* Outer container allows horizontal scrolling (with iOS momentum) *\/\n  .ss-table-wrap { overflow-x:auto; -webkit-overflow-scrolling:touch; }\n\n  \/* Base table styles *\/\n  table.ss-table { width:100%; border-collapse:collapse; min-width:640px; }\n  table.ss-table th, table.ss-table td {\n    padding:10px 12px; border:1px solid #e5e7eb; text-align:left; vertical-align:top;\n  }\n\n  \/* Key: prevent wrapping, word breaks, and vertical text in headers *\/\n  table.ss-table th {\n    white-space:nowrap;       \/* Do not wrap *\/\n    word-break:normal;        \/* Don’t break words *\/\n    letter-spacing:normal;    \/* Prevent theme styles from stretching letters *\/\n    font-weight:600;\n    background:#f8fafc;\n  }\n\n  \/* Small screen optimization *\/\n  @media (max-width:480px){\n    table.ss-table th, table.ss-table td { padding:8px 10px; font-size:14px; }\n  }\n\u003c\/style\u003e\n\n\u003csection\u003e\n  \u003ch2\u003eProduct Details\u003c\/h2\u003e\n  \u003cp\u003eThis is an aftermarket \u003cstrong\u003eRaw Water Pump – Fits Northern Lights 6KW and Under Series Generators\u003c\/strong\u003e, including M643 and M673 series variants. It is engineered to meet or exceed OEM specifications for reliable cooling performance in marine environments.\u003c\/p\u003e\n  \u003cp\u003eIt serves as a direct replacement for Northern Lights part numbers 25-12007, 145016820, and 25-18305, as well as Jabsco 30415-7001 and JMP JPR-NL08IH.\u003c\/p\u003e\n  \u003cul\u003e\n    \u003cli\u003eDesigned for direct, hassle-free installation.\u003c\/li\u003e\n    \u003cli\u003eConstructed from marine-grade bronze for superior corrosion resistance.\u003c\/li\u003e\n    \u003cli\u003eFeatures bidirectional rotation for flexible setup.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/section\u003e\n\n\u003csection\u003e\n  \u003ch2\u003ePart Number Matrix\u003c\/h2\u003e\n  \u003cp\u003eUse this matrix to confirm equivalent references across OEM and aftermarket.\u003c\/p\u003e\n  \u003cdiv class=\"ss-table-wrap\"\u003e\n    \u003ctable class=\"ss-table\" aria-label=\"Part Number Matrix\"\u003e\n      \u003cthead\u003e\n        \u003ctr\u003e\n          \u003cth\u003eBrand\u003c\/th\u003e\n          \u003cth\u003ePart Number\u003c\/th\u003e\n        \u003c\/tr\u003e\n      \u003c\/thead\u003e\n      \u003ctbody\u003e\n        \u003ctr\u003e\n          \u003ctd\u003eNorthern Lights\u003c\/td\u003e\n          \u003ctd\u003e25-12007\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003ctd\u003eNorthern Lights\u003c\/td\u003e\n          \u003ctd\u003e145016820\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003ctd\u003eNorthern Lights\u003c\/td\u003e\n          \u003ctd\u003e25-18305\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003ctd\u003eJabsco\u003c\/td\u003e\n          \u003ctd\u003e30415-7001\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003ctd\u003eJMP\u003c\/td\u003e\n          \u003ctd\u003eJPR-NL08IH\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003ctd\u003eAncor\u003c\/td\u003e\n          \u003ctd\u003e298\u003c\/td\u003e\n        \u003c\/tr\u003e\n      \u003c\/tbody\u003e\n    \u003c\/table\u003e\n  \u003c\/div\u003e\n\u003c\/section\u003e\n\n\u003csection\u003e\n  \u003ch2\u003eEngine \u0026amp; Model Compatibility\u003c\/h2\u003e\n  \u003cp\u003eConfirm your engine model\/year in the table below.\u003c\/p\u003e\n  \u003cp\u003eThis pump is compatible with a range of Northern Lights generators.\u003c\/p\u003e\n  \u003cdiv class=\"ss-table-wrap\"\u003e\n    \u003ctable class=\"ss-table\" aria-label=\"Engine \u0026amp; Model Compatibility\"\u003e\n      \u003cthead\u003e\n        \u003ctr\u003e\n          \u003cth\u003eBrand\u003c\/th\u003e\n          \u003cth\u003eModel\u003c\/th\u003e\n          \u003cth\u003eOEM Part No.\u003c\/th\u003e\n        \u003c\/tr\u003e\n      \u003c\/thead\u003e\n      \u003ctbody\u003e\n        \u003ctr\u003e\n\u003ctd\u003eNorthern Lights\u003c\/td\u003e\n\u003ctd\u003eM643\u003c\/td\u003e\n\u003ctd\u003e25-12007\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eNorthern Lights\u003c\/td\u003e\n\u003ctd\u003eM643K\u003c\/td\u003e\n\u003ctd\u003e25-12007\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eNorthern Lights\u003c\/td\u003e\n\u003ctd\u003eM643M\u003c\/td\u003e\n\u003ctd\u003e25-12007\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eNorthern Lights\u003c\/td\u003e\n\u003ctd\u003eNL643\u003c\/td\u003e\n\u003ctd\u003e25-12007\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eNorthern Lights\u003c\/td\u003e\n\u003ctd\u003eM673\u003c\/td\u003e\n\u003ctd\u003e25-12007\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eNorthern Lights\u003c\/td\u003e\n\u003ctd\u003eM673D\u003c\/td\u003e\n\u003ctd\u003e25-12007\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eNorthern Lights\u003c\/td\u003e\n\u003ctd\u003eM673L\u003c\/td\u003e\n\u003ctd\u003e25-12007\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eNorthern Lights\u003c\/td\u003e\n\u003ctd\u003eM673L2\u003c\/td\u003e\n\u003ctd\u003e25-12007\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eNorthern Lights\u003c\/td\u003e\n\u003ctd\u003eM673L3\u003c\/td\u003e\n\u003ctd\u003e25-12007\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eNorthern Lights\u003c\/td\u003e\n\u003ctd\u003eM673LD2\u003c\/td\u003e\n\u003ctd\u003e25-12007\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eNorthern Lights\u003c\/td\u003e\n\u003ctd\u003eM673LD3\u003c\/td\u003e\n\u003ctd\u003e25-12007\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eNorthern Lights\u003c\/td\u003e\n\u003ctd\u003eNL673\u003c\/td\u003e\n\u003ctd\u003e25-12007\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eNorthern Lights\u003c\/td\u003e\n\u003ctd\u003eNL673L\u003c\/td\u003e\n\u003ctd\u003e25-12007\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eNorthern Lights\u003c\/td\u003e\n\u003ctd\u003eNL673L2\u003c\/td\u003e\n\u003ctd\u003e25-12007\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eNorthern Lights\u003c\/td\u003e\n\u003ctd\u003eNL673L3\u003c\/td\u003e\n\u003ctd\u003e25-12007\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003c\/tbody\u003e\n    \u003c\/table\u003e\n  \u003c\/div\u003e\n\u003c\/section\u003e\n\n\u003csection\u003e\n  \u003ch2\u003eTechnical Specs\u003c\/h2\u003e\n  \u003cdl\u003e\n    \u003cdt\u003eProduct Type\u003c\/dt\u003e\n\u003cdd\u003eRaw Water Pump\u003c\/dd\u003e\n    \u003cdt\u003eInstallation\u003c\/dt\u003e\n\u003cdd\u003eDirect replacement\u003c\/dd\u003e\n    \u003cdt\u003eConnection\u003c\/dt\u003e\n\u003cdd\u003e1\/2\" Hose\u003c\/dd\u003e\n    \u003cdt\u003eHousing Material\u003c\/dt\u003e\n\u003cdd\u003eBronze (Marine Grade)\u003c\/dd\u003e\n    \u003cdt\u003eHousing Color\u003c\/dt\u003e\n\u003cdd\u003eBronze\u003c\/dd\u003e\n    \u003cdt\u003eDimensions\u003c\/dt\u003e\n\u003cdd\u003e110 × 117 × 81 mm (L×W×H)\u003c\/dd\u003e\n    \u003cdt\u003eWeight\u003c\/dt\u003e\n\u003cdd\u003e1.5 kg (3.3 lbs)\u003c\/dd\u003e\n    \u003cdt\u003eFitting Type\u003c\/dt\u003e\n\u003cdd\u003eHose barb\u003c\/dd\u003e\n    \u003cdt\u003eWarranty\u003c\/dt\u003e\n\u003cdd\u003e1 Year (JMP replacement)\u003c\/dd\u003e\n    \u003cdt\u003eOther Technical Attributes\u003c\/dt\u003e\n\u003cdd\u003eBidirectional rotation (can turn right or left)\u003c\/dd\u003e\n  \u003c\/dl\u003e\n\u003c\/section\u003e\n\n\u003csection\u003e\n  \u003ch2\u003eWhat’s in the Box\u003c\/h2\u003e\n  \u003cul\u003e\n    \u003cli\u003e1 x Raw Water Pump (25-12007)\u003c\/li\u003e\n    \u003cli\u003e1 x O-Ring Mounting Gasket\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/section\u003e\n\n\u003csection\u003e\n  \u003ch2\u003eInstallation Notes\u003c\/h2\u003e\n  \u003col\u003e\n    \u003cli\u003eEnsure the engine is completely cool and disconnect the battery.\u003c\/li\u003e\n    \u003cli\u003eClose the seacock to stop water flow.\u003c\/li\u003e\n    \u003cli\u003ePlace a catch pan under the old pump to collect any residual coolant.\u003c\/li\u003e\n    \u003cli\u003eLoosen the hose clamps and detach the inlet and outlet hoses from the pump.\u003c\/li\u003e\n    \u003cli\u003eUnbolt and remove the old pump from its mounting bracket.\u003c\/li\u003e\n    \u003cli\u003eClean the mounting surface and inspect the hoses for wear or damage, replacing if necessary.\u003c\/li\u003e\n    \u003cli\u003eInstall the new O-ring gasket and mount the new pump.\u003c\/li\u003e\n    \u003cli\u003eReconnect the hoses and tighten the clamps securely.\u003c\/li\u003e\n    \u003cli\u003eRe-open the seacock and reconnect the battery.\u003c\/li\u003e\n    \u003cli\u003eStart the engine and check for leaks at all connections.\u003c\/li\u003e\n  \u003c\/ol\u003e\n\u003c\/section\u003e\n\n\u003csection\u003e\n  \u003ch2\u003eTroubleshooting \u0026amp; FAQ\u003c\/h2\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWhich generator models does this pump fit?\u003c\/summary\u003e\n    \u003cp\u003eThis pump is designed for Northern Lights 6KW and under series generators, including the M643, M673, NL643, and NL673 families and their variants. Please check the compatibility list for your exact model.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWhat are the signs of a failing raw water pump?\u003c\/summary\u003e\n    \u003cp\u003eCommon signs include engine overheating, visible water leaks from the pump housing or weep holes, reduced water flow from the exhaust, and unusual grinding or whining noises from the pump assembly.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eIs this a self-priming pump?\u003c\/summary\u003e\n    \u003cp\u003eLike most raw water pumps with flexible impellers, this unit is self-priming to a certain extent. However, it is always recommended to ensure the system is properly primed upon installation or after maintenance to prevent dry running, which can damage the impeller.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWhat is \"bidirectional rotation\"?\u003c\/summary\u003e\n    \u003cp\u003eBidirectional rotation means the pump can operate correctly whether the engine drive turns it clockwise or counter-clockwise, making it compatible with a wider range of engine configurations without modification.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eHow often should the impeller be replaced?\u003c\/summary\u003e\n    \u003cp\u003eFor preventative maintenance, it is recommended to inspect the impeller annually and replace it every 1-2 years, depending on usage hours and operating conditions (e.g., water quality).\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eCan I buy just the impeller or gasket?\u003c\/summary\u003e\n    \u003cp\u003eThis listing is for the complete pump assembly. While replacement impellers and gaskets are standard service parts, please check our other listings or contact us to inquire about their availability.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eOEM vs. Aftermarket?\u003c\/summary\u003e\n    \u003cp\u003eThis listing is an aftermarket replacement (not OEM). Built to OEM-level specifications with comparable materials. Manufactured in an ISO 9002 facility, batch-inspected for consistency.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eShipping speed \u0026amp; cost\u003c\/summary\u003e\n    \u003cp\u003eWe ship worldwide quickly—typical transit 5–15 days. Standard shipping is free; expedited options appear at checkout where available.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWarranty \u0026amp; returns\u003c\/summary\u003e\n    \u003cp\u003eCovered by a 1-year warranty against manufacturing defects under normal use. If issues arise, contact support with your order details. Returns are accepted within our standard window (unused \u0026amp; in original condition). See our policy page or reach out for instructions.\u003c\/p\u003e\n  \u003c\/details\u003e\n\u003c\/section\u003e\n\n\u003csection\u003e\n  \u003ch2\u003eSafety \u0026amp; Important Info\u003c\/h2\u003e\n  \u003cul\u003e\n    \u003cli\u003eVerify images\/specifications vs your original part. If anything differs—even if your model appears compatible—do not purchase.\u003c\/li\u003e\n    \u003cli\u003eThis is an aftermarket replacement, not an OEM component.\u003c\/li\u003e\n    \u003cli\u003eProfessional installation is recommended for safety and performance.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/section\u003e\n\n\u003csection\u003e\n  \u003ch2\u003eAbout Sea Sierra\u003c\/h2\u003e\n  \u003cul\u003e\n    \u003cli\u003ePro-Grade Standards — We supply marine parts engineered to OEM-level tolerances and tested for real-world conditions.\u003c\/li\u003e\n    \u003cli\u003eFast Global Fulfillment — Free standard delivery to most regions in 5–15 days.\u003c\/li\u003e\n    \u003cli\u003eManufacturer-Direct Value — Fair pricing without compromising on materials or QC.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/section\u003e","brand":"SeaSierra","offers":[{"title":"Default Title","offer_id":50717896474939,"sku":"23FIP147R2","price":419.25,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0826\/8673\/8747\/files\/23FIP147R2.png?v=1762937708","url":"https:\/\/seasierra.com\/products\/raw-water-pump-fits-northern-lights-6kw-and-under-series-generators-replaces-25-12007-145016820-25-18305","provider":"SeaSierra","version":"1.0","type":"link"}