{"product_id":"johnson-pump-09-801b-f5-neoprene-impeller-kit","title":"Johnson Pump 09-801B F5 Neoprene Impeller Kit","description":"\u003cp class=\"nvn-hero\"\u003eThe Johnson Pump 09-801B is the genuine neoprene impeller for the F5 raw water pump. It's the little part that keeps seawater moving through your engine's cooling circuit. Molded to the right dimensions and the right compound, it's the spare every boater should keep aboard before it's needed.\u003c\/p\u003e\n\n\u003cdiv class=\"nvn-description\"\u003e\n\u003cp\u003eThe Johnson Pump 09-801B is the replacement neoprene impeller for the F5 raw water pump. It's a small part, but it does one of the most important jobs on your boat. It pulls seawater through the pump and pushes it into the engine's cooling circuit. When the impeller is healthy, your engine runs cool and steady. When it starts to go, you get overheating, a high-temp alarm at the worst possible moment, and a lot of stress. So it pays to keep a good one in the pump and a spare in the toolbox.\u003c\/p\u003e\n\u003cp\u003eThis impeller measures 2-1\/4 inches on the outer diameter, 0.63 inches on the inner bore, and 1.24 inches wide. It's molded from neoprene, which is the standard rubber compound for raw water service. Neoprene flexes as the vanes sweep the pump housing, and that flex is what creates the pumping action. Over time and heat and hours, that same flexing wears the vane tips down. That's normal. Every raw water impeller is a wear part, and the F5 impeller is no exception.\u003c\/p\u003e\n\u003cp\u003eWe tell folks to plan on replacing the impeller once a season on most boats, and more often if you run in sandy, silty, or brackish water. Grit is hard on neoprene. If you've picked up sand through the intake, the vanes can tear or shred, and those fragments travel downstream and lodge in the heat exchanger. Then you've got a bigger problem than a forty-dollar impeller. Pull the pump cover once a year, take a look, and if the vanes are cracked, curled, or missing tips, swap it. It's cheap insurance.\u003c\/p\u003e\n\u003cp\u003eThe F5 pump shows up on a lot of small marine diesels and auxiliary cooling setups, so this impeller fits a wide range of boats, from sailboat auxiliaries to small powerboats. If you're a cruiser doing your own maintenance, this is exactly the kind of spare you want aboard before a long passage. And if you run a brackish lake or a silty river, don't wait for the season. Check it more often. The pump doesn't care how new your engine is. A worn impeller will cook any engine it's feeding.\u003c\/p\u003e\n\u003cp\u003eInstallation is straightforward on the F5, but there are a couple of things worth knowing. Grease the impeller with glycerin or a marine impeller lube before it goes in, never petroleum grease, because petroleum makes neoprene swell and fail early. Line the vanes up so they bend the correct way for the pump's rotation, seat it on the shaft, and fit the cover. If your boat has been sitting for a few months, rotate the pump shaft by hand before you start the engine. A dry impeller that's been parked can stick to the housing, and that first dry startup is where a lot of them fail.\u003c\/p\u003e\n\u003cp\u003eThis is the single-impeller service part for the F5 pump, so it's just the impeller. If your pump cover gasket or O-ring is old, it's smart to have those on hand too, since you're already in there. One thing to double-check before you order: this is the F5 impeller, not the larger F6 part. Measure your old impeller if you're unsure. The 2-1\/4 inch outer diameter and 0.63 inch bore are the numbers to match. Get those right and you've got the correct part.\u003c\/p\u003e\n\u003cp\u003eBottom line, the 09-801B is a genuine Johnson Pump impeller for the F5, built to the right dimensions and the right compound for marine raw water cooling. Keep one in service and one on the shelf, and you'll never be the boat drifting back to the ramp with a hot engine.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul class=\"nvn-features\"\u003e\n  \u003cli\u003eGenuine Johnson Pump 09-801B neoprene impeller for the F5 raw water pump\u003c\/li\u003e\n  \u003cli\u003e2-1\/4 inch outer diameter sized to seat correctly in the F5 pump housing\u003c\/li\u003e\n  \u003cli\u003e0.63 inch inner bore matched to the F5 pump shaft\u003c\/li\u003e\n  \u003cli\u003e1.24 inch width for proper vane coverage inside the pump\u003c\/li\u003e\n  \u003cli\u003eNeoprene compound built for marine raw water cooling service\u003c\/li\u003e\n  \u003cli\u003eFlexible vanes create steady suction to keep engine coolant flowing\u003c\/li\u003e\n  \u003cli\u003eWear part designed for routine seasonal replacement\u003c\/li\u003e\n  \u003cli\u003eSingle impeller, the right spare to keep aboard before a long trip\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 Johnson Pump 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 pump does the 09-801B fit?\u003c\/summary\u003e\n    \u003cp\u003eIt's the replacement impeller for the Johnson Pump F5 raw water pump. Match the dimensions: 2-1\/4 inch outer diameter, 0.63 inch inner bore, and 1.24 inch width.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eIs this the F5 impeller or the F6 impeller?\u003c\/summary\u003e\n    \u003cp\u003eThis is the F5 part. It does not fit the larger F6 pump. If you're not sure which pump you have, measure your old impeller against the 2-1\/4 inch outer diameter and 0.63 inch bore before ordering.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWhat is the impeller made of?\u003c\/summary\u003e\n    \u003cp\u003eNeoprene. It's the standard rubber compound for raw water impellers because it flexes reliably against the pump housing to create suction and holds up in salt and heat.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eHow often should I replace the impeller?\u003c\/summary\u003e\n    \u003cp\u003ePlan on once a season for most boats. If you run in sandy, silty, or brackish water, check it more often, because grit tears neoprene vanes faster.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWhat lubricant should I use during installation?\u003c\/summary\u003e\n    \u003cp\u003eUse glycerin or a marine impeller lube. Never petroleum grease. Petroleum makes neoprene swell and fail early.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWhat comes in the package?\u003c\/summary\u003e\n    \u003cp\u003eThis is the single impeller service part, so it's just the impeller. If your pump cover gasket or O-ring is worn, order those separately since you'll have the pump open anyway.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWhat are the exact dimensions?\u003c\/summary\u003e\n    \u003cp\u003e2-1\/4 inches outer diameter, 0.63 inches inner diameter, and 1.24 inches wide.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eHow do I know when the impeller is worn out?\u003c\/summary\u003e\n    \u003cp\u003eWatch for engine overheating or a high-temp alarm, and inspect the vanes at the pump cover. Cracked, curled, or missing vane tips mean it's time to replace it.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eMy boat sat all winter. Anything to check before starting?\u003c\/summary\u003e\n    \u003cp\u003eYes. Rotate the pump shaft by hand before you start the engine. A dry impeller that's been parked can stick to the housing, and a dry startup is a common failure point.\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\u003eJohnson Pump 09-801B F5 Neoprene Impeller Kit\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eBrand\u003c\/th\u003e\n\u003ctd\u003eJohnson Pump\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eManufacturer Part Number\u003c\/th\u003e\n\u003ctd\u003e09-801B\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eUPC\u003c\/th\u003e\n\u003ctd\u003e7330717000103\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eMaterial\u003c\/th\u003e\n\u003ctd\u003eNeoprene\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eOuter Diameter\u003c\/th\u003e\n\u003ctd\u003e2-1\/4 in\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eInner Diameter\u003c\/th\u003e\n\u003ctd\u003e0.63 in\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eWidth\u003c\/th\u003e\n\u003ctd\u003e1.24 in\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eApplication\u003c\/th\u003e\n\u003ctd\u003eEngine Raw Water Cooling\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eCompatible Pump\u003c\/th\u003e\n\u003ctd\u003eJohnson F5 Pump\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eQuantity\u003c\/th\u003e\n\u003ctd\u003eSingle\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eProduct Type\u003c\/th\u003e\n\u003ctd\u003eImpeller Kit\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 pump does the 09-801B fit?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"It's the replacement impeller for the Johnson Pump F5 raw water pump. Match the dimensions: 2-1\/4 inch outer diameter, 0.63 inch inner bore, and 1.24 inch width.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"Is this the F5 impeller or the F6 impeller?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"This is the F5 part. It does not fit the larger F6 pump. If you're not sure which pump you have, measure your old impeller against the 2-1\/4 inch outer diameter and 0.63 inch bore before ordering.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"What is the impeller made of?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"Neoprene. It's the standard rubber compound for raw water impellers because it flexes reliably against the pump housing to create suction and holds up in salt and heat.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"How often should I replace the impeller?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"Plan on once a season for most boats. If you run in sandy, silty, or brackish water, check it more often, because grit tears neoprene vanes faster.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"What lubricant should I use during installation?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"Use glycerin or a marine impeller lube. Never petroleum grease. Petroleum makes neoprene swell and fail early.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"What comes in the package?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"This is the single impeller service part, so it's just the impeller. If your pump cover gasket or O-ring is worn, order those separately since you'll have the pump open anyway.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"What are the exact dimensions?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"2-1\/4 inches outer diameter, 0.63 inches inner diameter, and 1.24 inches wide.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"How do I know when the impeller is worn out?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"Watch for engine overheating or a high-temp alarm, and inspect the vanes at the pump cover. Cracked, curled, or missing vane tips mean it's time to replace it.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"My boat sat all winter. Anything to check before starting?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"Yes. Rotate the pump shaft by hand before you start the engine. A dry impeller that's been parked can stick to the housing, and a dry startup is a common failure point.\"\n            }\n        }\n    ]\n}\n\u003c\/script\u003e\n","brand":"Johnson Pump","offers":[{"title":"Default Title","offer_id":45072958455901,"sku":"2009327","price":42.69,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0299\/7266\/0317\/files\/ImageServerAPI_b689293d-40ae-42f0-8ebd-9a9df44b9a30.png?v=1789757541","url":"https:\/\/nvnmarine.com\/products\/johnson-pump-09-801b-f5-neoprene-impeller-kit","provider":"NVN Marine","version":"1.0","type":"link"}