{"product_id":"arco-wp003-raw-water-pump-indmar-ford-351-gm","title":"ARCO WP003 Raw Water Pump for Indmar Ford 351 and GM Engines","description":"\u003cp class=\"nvn-hero\"\u003eThe ARCO WP003 is an OEM premium replacement raw water pump for Indmar Ford 351 and most GM inboard engines. It ships as a complete impeller and housing assembly, so you replace the whole pump in one part and get your cooling system flowing again. Built in the USA by ARCO Marine.\u003c\/p\u003e\n\n\u003cdiv class=\"nvn-description\"\u003e\n\u003cp\u003eWhen an inboard starts creeping up the temp gauge on a hot afternoon, the raw water pump is the first thing most techs check. The ARCO WP003 is an OEM premium replacement raw water pump built for Indmar Ford 351 engines and most GM inboards. It's the engine-mounted pump that pulls lake or sea water through the raw water side of your cooling system and moves it through the engine to carry heat away. When the impeller wears down or the housing starts to weep, water flow drops off and temperature climbs fast. This part puts that right.\u003c\/p\u003e\n\u003cp\u003eARCO ships the WP003 as a complete impeller and housing assembly. You're not rebuilding a tired pump or chasing down a separate impeller, cover plate, and body. You get the whole unit ready to bolt on, which is the way most owners want to handle a cooling failure that already cost them a day on the water. Swap the pump, prime the system, and you're back to running cool.\u003c\/p\u003e\n\u003cp\u003eWho's this for? Ski and wakeboard boat owners running Indmar Ford 351 power, and a wide range of GM-based inboards. If your boat came with one of those engines and the water pump is original, weeping, or pushing weak flow at the outlet, this is the replacement. Not sure it's your exact pump? Every raw water pump carries an OEM part number, and the WP003 cross-references the common ones. We've listed those numbers in the specs below so you can match them against the pump that's on your engine right now before you order.\u003c\/p\u003e\n\u003cp\u003eA failing raw water pump doesn't always let go all at once. Sometimes it's a slow thing. You notice the engine runs a few degrees warmer than it used to, or you spot a rusty drip under the pump after a weekend out. That drip is usually the weep hole telling you the seal is going. Left alone, a worn impeller sheds vanes into the cooling system, and now you're not just replacing a pump, you're fishing rubber out of your heat exchanger or exhaust elbows. Catching it early and dropping in a fresh WP003 is the cheap way out.\u003c\/p\u003e\n\u003cp\u003eARCO has been building marine engine parts since 1960, out of Pensacola, Florida. That's not a marketing line, it's why shops keep going back to them. Every unit gets tested and retested past normal operating conditions before it ships, so what shows up in the box behaves like the part that left the factory on your engine. For a component that stands between your engine and an overheat on open water, that track record matters.\u003c\/p\u003e\n\u003cp\u003eInstallation is a job most hands-on owners can handle with basic tools, though access depends on your boat. On tight ski and wake hulls, the pump can sit close to the exhaust manifold, so give yourself room and let the engine cool first. Reuse or renew your mounting gaskets per your engine's service procedure, snug the fasteners evenly, and check for leaks at first start. If you'd rather have a shop do it, ARCO's warranty even reimburses professional-installation labor on a unit they determine to be defective, which is a level of backing you don't see on every replacement pump.\u003c\/p\u003e\n\u003cp\u003eHow often should you touch a raw water impeller? There's no single number, but plenty of owners make it part of their regular service, checking it at the start of the season and replacing it on a sensible interval based on hours and water conditions. Boats that run in sandy, silty, or debris-heavy water wear impellers faster. If you've been putting it off and you're already in there, replacing the full pump assembly with the WP003 saves you from opening it back up next season.\u003c\/p\u003e\n\u003cp\u003eBottom line, the WP003 is the straightforward, OEM-quality fix for a raw water pump that's past its prime on an Indmar Ford 351 or GM inboard. Complete assembly, made in the USA, backed by a company that's been doing marine cooling for over sixty years. Confirm the cross-reference, get it on the engine, and get back to running cool.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul class=\"nvn-features\"\u003e\n  \u003cli\u003eOEM premium replacement raw water pump, engineered as a drop-in for Indmar Ford 351 and most GM inboard engines\u003c\/li\u003e\n  \u003cli\u003eComplete impeller and housing assembly, so you replace the whole pump in one part instead of rebuilding\u003c\/li\u003e\n  \u003cli\u003eCross-references common OEM part numbers, listed in the specs so you can confirm fitment before ordering\u003c\/li\u003e\n  \u003cli\u003eBuilt by ARCO Marine, a US manufacturer making marine engine parts since 1960\u003c\/li\u003e\n  \u003cli\u003eManufactured in Pensacola, Florida, and tested past normal operating conditions before it ships\u003c\/li\u003e\n  \u003cli\u003eBacked by ARCO's limited warranty, which reimburses professional-installation labor on units found defective\u003c\/li\u003e\n  \u003cli\u003eRestores full raw water flow to keep your inboard running cool and head off an overheat\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cdiv class=\"nvn-trust\"\u003e\n  \u003ch2\u003eWhy Buy from NVN Marine\u003c\/h2\u003e\n  \u003cul\u003e\n    \u003cli\u003eAuthorized ARCO Marine reseller, full manufacturer warranty\u003c\/li\u003e\n    \u003cli\u003eNMEA member and ABYC certified, advice from real boat techs\u003c\/li\u003e\n    \u003cli\u003eSame-day shipping before 3 PM ET on in-stock items\u003c\/li\u003e\n    \u003cli\u003eNY headquarters and Fort Lauderdale flagship retail store\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/div\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cdiv class=\"nvn-faq\"\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWhat engines does the ARCO WP003 fit?\u003c\/summary\u003e\n    \u003cp\u003eIt's built for Indmar Ford 351 engines and most GM inboards. Because fitment comes down to the exact pump on your engine, match the OEM cross-reference numbers in the specs against your current pump before you order.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWhat comes in the box?\u003c\/summary\u003e\n    \u003cp\u003eYou get the complete impeller and housing assembly. It's a full pump unit, not just a loose impeller, so you replace the whole thing in one shot.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eIs this a raw water pump or a coolant pump?\u003c\/summary\u003e\n    \u003cp\u003eIt's the raw water pump, the one that draws lake or sea water through the raw side of your cooling system to carry engine heat away. It isn't the freshwater circulating pump on a closed-cooling setup.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eHow do I know my water pump is failing?\u003c\/summary\u003e\n    \u003cp\u003eThe usual signs are the engine running warmer than normal, weak water flow at the outlet, or a rusty drip from the weep hole under the pump. A worn impeller can also shed vanes into the cooling system, so don't wait it out.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWill this replace my original OEM pump?\u003c\/summary\u003e\n    \u003cp\u003eYes. The WP003 is an OEM premium replacement that cross-references the common factory part numbers listed in the specs. Confirm the number matches the pump on your engine and it drops right in.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eIs the impeller included?\u003c\/summary\u003e\n    \u003cp\u003eIt is. The impeller comes as part of the housing assembly, so you're not buying it separately.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWhere is the WP003 made?\u003c\/summary\u003e\n    \u003cp\u003eARCO builds it in Pensacola, Florida. They've been manufacturing marine engine parts in the USA since 1960.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eDoes ARCO back it with a warranty?\u003c\/summary\u003e\n    \u003cp\u003eYes. ARCO's limited warranty covers a unit found defective under proper installation and use, and they'll even reimburse professional-installation labor in that case.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eHow often should a raw water impeller be replaced?\u003c\/summary\u003e\n    \u003cp\u003eThere's no single number, but many owners check it at the start of each season and replace on a regular interval based on hours and water conditions. Boats that run in silty or debris-heavy water wear impellers faster.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eDo I need new gaskets to install it?\u003c\/summary\u003e\n    \u003cp\u003ePlan to reuse or renew your mounting gaskets per your engine's service procedure. Inspect the sealing surfaces, snug the fasteners evenly, and check for leaks at first start.\u003c\/p\u003e\n  \u003c\/details\u003e\n\u003c\/div\u003e\n\n\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\n\u003ctable class=\"nvn-specs\"\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003cth\u003eTitle\u003c\/th\u003e\n\u003ctd\u003eARCO Marine WP003 Raw Water Pump (Impeller \u0026amp; Housing)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eBrand\u003c\/th\u003e\n\u003ctd\u003eARCO Marine\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eManufacturer Part Number\u003c\/th\u003e\n\u003ctd\u003eWP003\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eUPC\u003c\/th\u003e\n\u003ctd\u003e693006030111\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eProduct Type\u003c\/th\u003e\n\u003ctd\u003eRaw Water Circulating Pump\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eAssembly Includes\u003c\/th\u003e\n\u003ctd\u003eImpeller and housing\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eEngine Compatibility\u003c\/th\u003e\n\u003ctd\u003eIndmar Ford 351 and most GM inboard engines\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eReplaces OEM Part Numbers\u003c\/th\u003e\n\u003ctd\u003eVolvo Penta 3860703, Sierra 18-3587-1\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eReplacement Grade\u003c\/th\u003e\n\u003ctd\u003eOEM premium replacement\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eCountry of Origin\u003c\/th\u003e\n\u003ctd\u003eUnited States\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eManufactured In\u003c\/th\u003e\n\u003ctd\u003ePensacola, Florida\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eWarranty\u003c\/th\u003e\n\u003ctd\u003eARCO limited warranty with professional-installation labor reimbursement on defective units\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003cscript type=\"application\/ld+json\"\u003e\n{\n    \"@context\": \"https:\/\/schema.org\",\n    \"@type\": \"FAQPage\",\n    \"mainEntity\": [\n        {\n            \"@type\": \"Question\",\n            \"name\": \"What engines does the ARCO WP003 fit?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"It's built for Indmar Ford 351 engines and most GM inboards. Because fitment comes down to the exact pump on your engine, match the OEM cross-reference numbers in the specs against your current pump before you order.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"What comes in the box?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"You get the complete impeller and housing assembly. It's a full pump unit, not just a loose impeller, so you replace the whole thing in one shot.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"Is this a raw water pump or a coolant pump?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"It's the raw water pump, the one that draws lake or sea water through the raw side of your cooling system to carry engine heat away. It isn't the freshwater circulating pump on a closed-cooling setup.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"How do I know my water pump is failing?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"The usual signs are the engine running warmer than normal, weak water flow at the outlet, or a rusty drip from the weep hole under the pump. A worn impeller can also shed vanes into the cooling system, so don't wait it out.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"Will this replace my original OEM pump?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"Yes. The WP003 is an OEM premium replacement that cross-references the common factory part numbers listed in the specs. Confirm the number matches the pump on your engine and it drops right in.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"Is the impeller included?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"It is. The impeller comes as part of the housing assembly, so you're not buying it separately.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"Where is the WP003 made?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"ARCO builds it in Pensacola, Florida. They've been manufacturing marine engine parts in the USA since 1960.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"Does ARCO back it with a warranty?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"Yes. ARCO's limited warranty covers a unit found defective under proper installation and use, and they'll even reimburse professional-installation labor in that case.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"How often should a raw water impeller be replaced?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"There's no single number, but many owners check it at the start of each season and replace on a regular interval based on hours and water conditions. Boats that run in silty or debris-heavy water wear impellers faster.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"Do I need new gaskets to install it?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"Plan to reuse or renew your mounting gaskets per your engine's service procedure. Inspect the sealing surfaces, snug the fasteners evenly, and check for leaks at first start.\"\n            }\n        }\n    ]\n}\n\u003c\/script\u003e\n","brand":"ARCO Marine","offers":[{"title":"Default Title","offer_id":44999046299741,"sku":"2007722","price":296.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0299\/7266\/0317\/files\/ImageServerAPI_31254ff3-6f03-41c9-9f3d-787c4b09a5bd.jpg?v=1788694109","url":"https:\/\/nvnmarine.com\/products\/arco-wp003-raw-water-pump-indmar-ford-351-gm","provider":"NVN Marine","version":"1.0","type":"link"}