{"product_id":"whale-ak9003-gusher-urchin-bilge-pump-service-kit","title":"Whale AK9003 Gusher Urchin Bilge Pump Service Kit","description":"\u003cp class=\"nvn-hero\"\u003eThe Whale AK9003 is the factory service kit for the Gusher Urchin BP9005 and BP9021 manual bilge pumps. It's got the neoprene diaphragm, both valves, and all four circlips you need to bring a tired pump back to full flow in about 20 minutes.\u003c\/p\u003e\n\n\u003cdiv class=\"nvn-description\"\u003e\n\u003cp\u003eThe Whale Gusher Urchin is one of those pumps that just keeps working season after season, and this AK9003 kit is how you keep it that way. It's the factory service kit for the BP9005 and BP9021 Urchin compact bilge and waste pumps. Inside you get everything that actually wears out: a fresh neoprene diaphragm, a new inlet valve, a new outlet valve, two small circlips, and two large circlips. That's the full set of soft parts and retainers, so one kit brings a tired pump back to full flow.\u003c\/p\u003e\n\u003cp\u003eHere's the thing about these Urchin pumps. The housing and the lever gear are built to last for years, but the diaphragm and valves take all the abuse. Saltwater, grit, UV, and the freeze-thaw of a winter on the hard all chew through the rubber. When your pump starts losing prime, moving less water per stroke, or dribbling instead of pushing a solid slug, it's almost always the diaphragm or a torn valve flap, not the pump body. Replacing those parts costs a fraction of a new pump, and the whole rebuild takes about 15 to 20 minutes at the bench or down in the bilge.\u003c\/p\u003e\n\u003cp\u003eBecause it's the genuine Whale kit, the diaphragm is molded neoprene and the valves are matched to the Urchin's port geometry, so you're not fighting a universal part that almost fits. That matters on a pump you're trusting to clear water in a hurry.\u003c\/p\u003e\n\u003cp\u003eThis kit is matched to the Gusher Urchin family, specifically the BP9005 fixed-handle version and the BP9021 removable-handle version. Both are the compact manual pumps you'll find mounted on deck, on a bulkhead, or low in the bilge of sailboats and smaller powerboats. If you're not sure which Urchin you've got, check the casting on the pump body. The soft parts in the AK9003 are common to both, but it's worth confirming your port threads match before you order, especially on an older pump.\u003c\/p\u003e\n\u003cp\u003eThe Urchin isn't only a bilge pump, either. Plenty of boaters run it for waste and greywater transfer, and the same soft parts wear the same way in that duty. If yours has been pulling from a shower sump or a holding setup, the diaphragm and valves are working just as hard as any bilge pump. A strainer or strum box on the inlet cuts down on debris damage and stretches the life of every rebuild, which is worth fitting while you've got the pump apart anyway.\u003c\/p\u003e\n\u003cp\u003eThe rebuild itself is straightforward, but a couple of details make the difference between a dry job and a leaky one. Seat the new diaphragm fully into its groove before you tighten the cover down, because the most common leak after a service is a diaphragm that got pinched at the large circlip. Clean the valve seats before you drop the new valves in. On an older pump with a corroded housing, the inlet valve can bind if the mating surface is rough, so a quick wipe-down saves you grief. And keep track of those small circlips. They love to pop off and disappear, so a magnetic pickup tool is your friend in a tight bilge.\u003c\/p\u003e\n\u003cp\u003eOne more tip from the dock: buy a spare set of small circlips or a second kit if you cruise far from a chandlery. Those little retainers are the one part that tends to walk off on the first service, and you don't want a fresh diaphragm sitting on the shelf because you lost a five-cent clip.\u003c\/p\u003e\n\u003cp\u003eIf you run a manual pump as backup to an electric one, or as the primary on a smaller boat, keeping a service kit aboard is cheap insurance. A lot of sailors get two or three seasons out of a diaphragm in saltwater, so it's smart to rebuild on a schedule rather than waiting for the pump to quit when you actually need it most. After you button it back up, work the pump a few strokes dry to check the action and confirm the valves are sealing before you splash. Do that, and your Urchin will move water like the day it was new.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul class=\"nvn-features\"\u003e\n  \u003cli\u003eComplete factory service kit for the Whale Gusher Urchin BP9005 and BP9021 manual bilge and waste pumps\u003c\/li\u003e\n  \u003cli\u003eIncludes one neoprene diaphragm, the part that takes the most wear from saltwater and UV\u003c\/li\u003e\n  \u003cli\u003eNew inlet valve and outlet valve restore full suction and stop backflow\u003c\/li\u003e\n  \u003cli\u003eTwo small circlips and two large circlips included, so you replace the retainers along with the rubber\u003c\/li\u003e\n  \u003cli\u003eNeoprene diaphragm flexes cleanly for reliable priming and clears small debris\u003c\/li\u003e\n  \u003cli\u003eRebuilds a worn pump in about 15 to 20 minutes with basic hand tools\u003c\/li\u003e\n  \u003cli\u003eCosts a fraction of a new pump and keeps your original housing in service\u003c\/li\u003e\n  \u003cli\u003eFits both the fixed-handle BP9005 and the removable-handle BP9021 Urchin\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 Whale 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\u003eWhich pumps does the AK9003 kit fit?\u003c\/summary\u003e\n    \u003cp\u003eIt's the service kit for the Whale Gusher Urchin BP9005 fixed-handle and BP9021 removable-handle compact bilge and waste pumps. The soft parts are common to both. On an older pump, confirm your port threads before ordering.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWhat's included in the kit?\u003c\/summary\u003e\n    \u003cp\u003eOne neoprene diaphragm, one inlet valve, one outlet valve, two small circlips, and two large circlips. That's the full set of parts that wear out on an Urchin pump.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eHow often should I rebuild my Urchin pump?\u003c\/summary\u003e\n    \u003cp\u003eA lot of boaters get two or three seasons out of a diaphragm in saltwater. Rebuilding on a schedule beats waiting for the pump to quit when you actually need it, so keeping a kit aboard is smart insurance.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWhat are the common problems with these bilge pumps?\u003c\/summary\u003e\n    \u003cp\u003eAlmost always the soft parts. A worn or split diaphragm makes the pump lose prime and move less water, and a torn valve flap lets water dribble back instead of pushing through. Both are exactly what this kit replaces.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eHow long does the rebuild take?\u003c\/summary\u003e\n    \u003cp\u003eAbout 15 to 20 minutes with basic hand tools. The trickiest part is handling the small circlips in a tight bilge, so a magnetic pickup tool helps.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWhy is my pump leaking after I replaced the diaphragm?\u003c\/summary\u003e\n    \u003cp\u003eThe most common cause is a diaphragm that wasn't seated fully into its groove before the cover was tightened, so it pinched at the large circlip. Pull the cover, reseat the diaphragm cleanly all the way around, then retighten.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eIs the Urchin a submersible pump?\u003c\/summary\u003e\n    \u003cp\u003eNo. The Gusher Urchin is a manual diaphragm pump that mounts above the water and draws through a hose. This kit services that pump's soft parts, it doesn't turn it into a submersible unit.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eIs the diaphragm neoprene?\u003c\/summary\u003e\n    \u003cp\u003eYes. The AK9003 diaphragm is molded neoprene, which flexes cleanly for reliable priming and stands up to grit and UV in a working bilge.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eCan I use this pump for waste or greywater?\u003c\/summary\u003e\n    \u003cp\u003eYes, the Urchin is used for bilge, waste, and greywater transfer. The same soft parts wear the same way in that duty, so this kit rebuilds it either way. A strainer on the inlet cuts down on debris damage.\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\u003eWhale Gusher Urchin Bilge Pump Service Kit AK9003\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eBrand\u003c\/th\u003e\n\u003ctd\u003eWhale Marine\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eManufacturer Part Number\u003c\/th\u003e\n\u003ctd\u003eAK9003\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eUPC\u003c\/th\u003e\n\u003ctd\u003e766478900302\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eKit Type\u003c\/th\u003e\n\u003ctd\u003eService \/ rebuild kit\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eCompatible Pumps\u003c\/th\u003e\n\u003ctd\u003eGusher Urchin BP9005, BP9021\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003ePump Application\u003c\/th\u003e\n\u003ctd\u003eManual bilge and waste pump\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eDiaphragm\u003c\/th\u003e\n\u003ctd\u003e1 (neoprene)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eInlet Valve\u003c\/th\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eOutlet Valve\u003c\/th\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eSmall Circlips\u003c\/th\u003e\n\u003ctd\u003e2\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eLarge Circlips\u003c\/th\u003e\n\u003ctd\u003e2\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eDiaphragm Material\u003c\/th\u003e\n\u003ctd\u003eNeoprene\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\": \"Which pumps does the AK9003 kit fit?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"It's the service kit for the Whale Gusher Urchin BP9005 fixed-handle and BP9021 removable-handle compact bilge and waste pumps. The soft parts are common to both. On an older pump, confirm your port threads before ordering.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"What's included in the kit?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"One neoprene diaphragm, one inlet valve, one outlet valve, two small circlips, and two large circlips. That's the full set of parts that wear out on an Urchin pump.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"How often should I rebuild my Urchin pump?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"A lot of boaters get two or three seasons out of a diaphragm in saltwater. Rebuilding on a schedule beats waiting for the pump to quit when you actually need it, so keeping a kit aboard is smart insurance.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"What are the common problems with these bilge pumps?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"Almost always the soft parts. A worn or split diaphragm makes the pump lose prime and move less water, and a torn valve flap lets water dribble back instead of pushing through. Both are exactly what this kit replaces.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"How long does the rebuild take?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"About 15 to 20 minutes with basic hand tools. The trickiest part is handling the small circlips in a tight bilge, so a magnetic pickup tool helps.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"Why is my pump leaking after I replaced the diaphragm?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"The most common cause is a diaphragm that wasn't seated fully into its groove before the cover was tightened, so it pinched at the large circlip. Pull the cover, reseat the diaphragm cleanly all the way around, then retighten.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"Is the Urchin a submersible pump?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"No. The Gusher Urchin is a manual diaphragm pump that mounts above the water and draws through a hose. This kit services that pump's soft parts, it doesn't turn it into a submersible unit.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"Is the diaphragm neoprene?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"Yes. The AK9003 diaphragm is molded neoprene, which flexes cleanly for reliable priming and stands up to grit and UV in a working bilge.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"Can I use this pump for waste or greywater?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"Yes, the Urchin is used for bilge, waste, and greywater transfer. The same soft parts wear the same way in that duty, so this kit rebuilds it either way. A strainer on the inlet cuts down on debris damage.\"\n            }\n        }\n    ]\n}\n\u003c\/script\u003e\n","brand":"Whale Marine","offers":[{"title":"Default Title","offer_id":45075658997853,"sku":"2009664","price":29.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0299\/7266\/0317\/files\/ImageServerAPI_36cc270e-7414-47c9-932a-0863a2bcb5f3.jpg?v=1789852058","url":"https:\/\/nvnmarine.com\/products\/whale-ak9003-gusher-urchin-bilge-pump-service-kit","provider":"NVN Marine","version":"1.0","type":"link"}