{"product_id":"johnson-pump-f5b-9-service-kit-09-45808","title":"Johnson Pump F5B-9 Service Kit 09-45808","description":"\u003cp class=\"nvn-hero\"\u003eThis is the genuine Johnson Pump service kit for the F5B-9 raw-water engine cooling pump, part 09-45808. It bundles the flexible impeller, shaft seal, gasket, o-ring, and end cover screw so you can rebuild the pump you already have and get flow back. Everything's matched to the F5B-9 body, no guesswork on sizing.\u003c\/p\u003e\n\n\u003cdiv class=\"nvn-description\"\u003e\n\u003cp\u003eWhen a Johnson Pump F5B-9 starts losing its prime or the temperature needle creeps up on a hot run, the flexible impeller spinning inside that pump is almost always the reason. This service kit, part 09-45808, carries the wear parts you need to bring that raw-water pump back to full flow without buying a whole new pump. You get the impeller, the shaft seal, a fresh gasket and o-ring, and a new end cover screw, all matched to the F5B-9 body. It's the difference between an afternoon at the dock with a screwdriver and a much bigger bill.\u003c\/p\u003e\n\u003cp\u003eThe F5B-9 is a flange-mounted engine cooling pump. It's the part that pulls raw water, seawater or lake water, through the cooling circuit so your engine doesn't cook itself. Because that impeller runs against a cam inside the housing every second the engine turns, it's a consumable. Rubber vanes flex, take a set, and eventually crack or shed their tips. When that happens flow drops off, and a pump that can't move water is a pump that lets your engine overheat. Rebuilding it on a schedule is cheap insurance.\u003c\/p\u003e\n\u003cp\u003eHow do you know it's time? Watch for the obvious signs. The engine runs hotter than it used to, the tell-tale stream out the back gets weak or sputters, or the pump takes longer to prime after you launch. Sometimes you'll spot a little water weeping from the pump face, which points to a tired gasket or seal. If your boat has been sitting over the winter, the impeller may have taken a permanent set against the cam, and it's smart to replace it before the first trip rather than find out on the water. A season or two on an impeller is normal life. Pushing it to three or four is asking for a tow.\u003c\/p\u003e\n\u003cp\u003eHere's what's in the kit and why each piece matters. The flexible impeller (09-1027B) is the heart of it, the neoprene wheel that actually moves the water. The seal (0.2233.25 \/ 0.2233.001) rides on the shaft and keeps raw water from working its way back into the drive end. The gasket and o-ring (01-45315) reseal the end cover so the pump holds prime and doesn't weep at the face. And the end cover screw (01-46794-12) replaces the one fastener that always seems to corrode or strip after a few seasons in salt air. Swap them together and the pump comes back sealed all the way around, not just where you can see.\u003c\/p\u003e\n\u003cp\u003eA few notes from the bench. Never run one of these pumps dry, even for a couple of seconds. Without water for lubrication the impeller vanes overheat and shred almost instantly, and then you're doing this job again. When you pull the old impeller, count the vanes. If any are missing, they went downstream into the cooling system and you'll want to find them before they block a heat exchanger. Give the new impeller a smear of pump grease or a little dish soap before it goes in, seat the o-ring clean in its groove, and snug the end cover screws down evenly so the cover pulls flat. Even pressure is what stops the weeping.\u003c\/p\u003e\n\u003cp\u003eWho's this for? Anyone running an inboard or sterndrive cooled by a Johnson Pump F5B-9 who'd rather do a twenty-minute impeller service in the slip than get towed in. It's a genuine Johnson Pump kit, so the impeller diameter, spline count, and seal size are already right for the F5B-9. No measuring, no cross-referencing, no hoping the generic one fits. Keep one in the spares box and you'll never be the boat that overheated on the nicest day of the year.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul class=\"nvn-features\"\u003e\n  \u003cli\u003eFits Johnson Pump F5B-9 series raw-water pumps, so you rebuild the pump you already have instead of buying a whole new unit\u003c\/li\u003e\n  \u003cli\u003eFlexible impeller (09-1027B) included, the neoprene part that actually moves the water and wears out first\u003c\/li\u003e\n  \u003cli\u003eShaft seal (0.2233.25 \/ 0.2233.001) keeps raw water out of the drive end and off the shaft\u003c\/li\u003e\n  \u003cli\u003eGasket and o-ring (01-45315) reseal the end cover so the pump holds prime and doesn't weep at the face\u003c\/li\u003e\n  \u003cli\u003eNew end cover screw (01-46794-12) replaces the fastener that most often corrodes or strips in salt air\u003c\/li\u003e\n  \u003cli\u003eEvery part is matched to the F5B-9 body, no guessing on impeller diameter, spline count, or seal size\u003c\/li\u003e\n  \u003cli\u003eGenuine Johnson Pump wear parts for engine-cooling and raw-water circulation service\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 09-45808 service kit fit?\u003c\/summary\u003e\n    \u003cp\u003eIt's made for the Johnson Pump F5B-9 series raw-water engine cooling pump. The impeller, seal, gasket, o-ring, and end cover screw are all sized to that specific pump body.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWhat's included in the kit?\u003c\/summary\u003e\n    \u003cp\u003eYou get the flexible impeller (09-1027B), the shaft seal (0.2233.25 \/ 0.2233.001), a gasket, an o-ring (01-45315), and an end cover screw (01-46794-12). It's everything that wears during a normal impeller service.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWhat is the impeller part number in this kit?\u003c\/summary\u003e\n    \u003cp\u003eThe impeller is Johnson Pump 09-1027B, the flexible neoprene impeller for the F5B-9 pump.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eHow often should I replace the impeller?\u003c\/summary\u003e\n    \u003cp\u003eOn a raw-water flexible impeller pump, once a season is the safe habit, and always before the first trip if the boat has been laid up over winter. An impeller that has taken a set against the cam can fail early even if it looks fine.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eCan I run the pump dry to prime it?\u003c\/summary\u003e\n    \u003cp\u003eNo. Running a flexible impeller pump dry, even briefly, overheats the vanes and shreds them fast. Always make sure the pump has water before you run the engine.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eDo I have to remove the whole pump to do this service?\u003c\/summary\u003e\n    \u003cp\u003eUsually not. Most of this kit installs through the end cover, so you can pull the cover, swap the impeller, seal, gasket, and o-ring, and reseal it with the new screw. Access depends on how the pump is mounted in your engine bay.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eThe old impeller is missing some vanes. What now?\u003c\/summary\u003e\n    \u003cp\u003eThose pieces went downstream into the cooling system. Find and remove them before they lodge in a heat exchanger or hose elbow, otherwise they'll restrict flow after your rebuild.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eIs this a genuine Johnson Pump kit or an aftermarket copy?\u003c\/summary\u003e\n    \u003cp\u003eThis is a genuine Johnson Pump service kit, so the parts match the F5B-9 pump's factory dimensions and there's no cross-referencing needed.\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\u003eService Kit For F5B-9 Series Johnson Pump; With Impeller (09-1027B)\/ Seal (0.2233.25) (0.2233.001)\/ Gasket\/ O-Ring (01-45315)\/ End Cover Screw (01-46794-12)\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\u003e09-45808\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eUPC\u003c\/th\u003e\n\u003ctd\u003e7330717002633\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eFits Pump Series\u003c\/th\u003e\n\u003ctd\u003eF5B-9\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eKit Type\u003c\/th\u003e\n\u003ctd\u003eRaw-water flexible impeller pump service kit\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eImpeller\u003c\/th\u003e\n\u003ctd\u003e09-1027B\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eSeal\u003c\/th\u003e\n\u003ctd\u003e0.2233.25 \/ 0.2233.001\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eGasket\u003c\/th\u003e\n\u003ctd\u003eIncluded\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eO-Ring\u003c\/th\u003e\n\u003ctd\u003e01-45315\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eEnd Cover Screw\u003c\/th\u003e\n\u003ctd\u003e01-46794-12\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003ePump Type\u003c\/th\u003e\n\u003ctd\u003eFlange-mounted engine cooling \/ raw-water pump\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eApplication\u003c\/th\u003e\n\u003ctd\u003eMarine engine cooling and raw-water circulation\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 09-45808 service kit fit?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"It's made for the Johnson Pump F5B-9 series raw-water engine cooling pump. The impeller, seal, gasket, o-ring, and end cover screw are all sized to that specific pump body.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"What's included in the kit?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"You get the flexible impeller (09-1027B), the shaft seal (0.2233.25 \/ 0.2233.001), a gasket, an o-ring (01-45315), and an end cover screw (01-46794-12). It's everything that wears during a normal impeller service.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"What is the impeller part number in this kit?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"The impeller is Johnson Pump 09-1027B, the flexible neoprene impeller for the F5B-9 pump.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"How often should I replace the impeller?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"On a raw-water flexible impeller pump, once a season is the safe habit, and always before the first trip if the boat has been laid up over winter. An impeller that has taken a set against the cam can fail early even if it looks fine.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"Can I run the pump dry to prime it?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"No. Running a flexible impeller pump dry, even briefly, overheats the vanes and shreds them fast. Always make sure the pump has water before you run the engine.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"Do I have to remove the whole pump to do this service?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"Usually not. Most of this kit installs through the end cover, so you can pull the cover, swap the impeller, seal, gasket, and o-ring, and reseal it with the new screw. Access depends on how the pump is mounted in your engine bay.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"The old impeller is missing some vanes. What now?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"Those pieces went downstream into the cooling system. Find and remove them before they lodge in a heat exchanger or hose elbow, otherwise they'll restrict flow after your rebuild.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"Is this a genuine Johnson Pump kit or an aftermarket copy?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"This is a genuine Johnson Pump service kit, so the parts match the F5B-9 pump's factory dimensions and there's no cross-referencing needed.\"\n            }\n        }\n    ]\n}\n\u003c\/script\u003e\n","brand":"Johnson Pump","offers":[{"title":"Default Title","offer_id":45072857759837,"sku":"2009308","price":43.69,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0299\/7266\/0317\/files\/ImageServerAPI_8274d940-f8c2-4006-b695-be0205203eeb.jpg?v=1789753792","url":"https:\/\/nvnmarine.com\/products\/johnson-pump-f5b-9-service-kit-09-45808","provider":"NVN Marine","version":"1.0","type":"link"}