{"product_id":"johnson-pump-f4b-impeller-kit-09-1026b-1","title":"Johnson Pump F4B Impeller Kit 09-1026B-1 | Replaces Jabsco 673-0001","description":"\u003ch2\u003eJohnson Pump F4B Impeller Kit 09-1026B-1\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003ePart Number:\u003c\/strong\u003e 09-1026B-1 (also shown as 091026B1)  |  \u003cstrong\u003eUPC:\u003c\/strong\u003e 7330717008758\u003c\/p\u003e\n\u003cp\u003eThe Johnson Pump 09-1026B-1 is a genuine F4 \/ F4B flexible impeller service kit for marine engine raw-water cooling pumps. It uses Johnson's MC97 \/ EPDM cooling-water compound in a 6-blade, pin-drive configuration engineered to deliver dependable raw-water flow through compatible F4-series pumps.\u003c\/p\u003e\n\n\u003ch3\u003eImpeller Specifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePump family:\u003c\/strong\u003e Johnson Pump F4 \/ F4B\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e MC97 \/ EPDM cooling-water compound\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNumber of blades:\u003c\/strong\u003e 6\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrive type:\u003c\/strong\u003e Pin drive\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOutside diameter:\u003c\/strong\u003e 2.00 in. \/ 50.8 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWidth:\u003c\/strong\u003e 0.87 in. \/ 22 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHub \/ bore diameter:\u003c\/strong\u003e 0.50 in. \/ 12.7 mm\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eKit Contents\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e09-1026B-1 F4B flexible impeller\u003c\/li\u003e\n\u003cli\u003e01-42391 gasket\u003c\/li\u003e\n\u003cli\u003e01-45284 pump gasket (F4B-9 applications)\u003c\/li\u003e\n\u003cli\u003eImpeller installation lubricant\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eCompatible Pump Models\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eJohnson Pump F4\u003c\/li\u003e\n\u003cli\u003eJohnson Pump F4B\u003c\/li\u003e\n\u003cli\u003eJohnson Pump F4B-4\u003c\/li\u003e\n\u003cli\u003eJohnson Pump F4B-9\u003c\/li\u003e\n\u003cli\u003eJohnson Pump F4B-903\u003c\/li\u003e\n\u003cli\u003eJohnson Pump F4B\/6-M\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eCompatible Applications\u003c\/h3\u003e\n\u003cp\u003eCross-reference catalogs associate this impeller family with marine cooling systems from:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eVolvo Penta\u003c\/li\u003e\n\u003cli\u003ePerkins\u003c\/li\u003e\n\u003cli\u003eWesterbeke\u003c\/li\u003e\n\u003cli\u003eYanmar\u003c\/li\u003e\n\u003cli\u003eBukh\u003c\/li\u003e\n\u003cli\u003eFarymann\u003c\/li\u003e\n\u003cli\u003eLombardini\u003c\/li\u003e\n\u003cli\u003eVM Motori\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eAlways confirm fitment by matching the existing pump model and impeller number rather than engine brand alone.\u003c\/p\u003e\n\n\u003ch3\u003eFitment Notice\u003c\/h3\u003e\n\u003cp\u003eBefore ordering, confirm:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003ePump model and F4 \/ F4B designation\u003c\/li\u003e\n\u003cli\u003eExisting impeller number\u003c\/li\u003e\n\u003cli\u003ePin-drive hub configuration\u003c\/li\u003e\n\u003cli\u003eOutside diameter: 2.00 in. \/ 50.8 mm\u003c\/li\u003e\n\u003cli\u003eWidth: 0.87 in. \/ 22 mm\u003c\/li\u003e\n\u003cli\u003eBore: 0.50 in. \/ 12.7 mm\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eImportant:\u003c\/strong\u003e Johnson offers several F4 impellers with the same 2.00 in. \/ 50.8 mm outside diameter but different hub bores and drive styles. The \u003ca href=\"\/products\/8131455287332\"\u003eJohnson 09-808B-1\u003c\/a\u003e uses a 0.47 in. \/ 12 mm bore, while 09-1026B-1 uses 0.50 in. \/ 12.7 mm. Matching the full impeller number and hub configuration is essential to ensure correct fit and pump performance.\u003c\/p\u003e\n\n\u003ch3\u003eOEM \u0026amp; Cross-Reference Part Numbers\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eJohnson Pump: \u003cstrong\u003e09-1026B-1\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eAlso shown as: \u003cstrong\u003e091026B1\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eJabsco: \u003cstrong\u003e673-0001\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003ePerkins: \u003cstrong\u003e24880194\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eVolvo Penta: \u003cstrong\u003e804696  \/  875808  \/  897055  \/  3593659\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eWesterbeke: \u003cstrong\u003e21218\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhen to Replace the Impeller\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eCooling-water flow becomes weak or intermittent\u003c\/li\u003e\n\u003cli\u003eVanes are cracked, torn, stiff, or permanently deformed\u003c\/li\u003e\n\u003cli\u003eMissing blade material is found — inspect all downstream cooling passages for fragments before reassembly\u003c\/li\u003e\n\u003cli\u003ePump has been run dry\u003c\/li\u003e\n\u003cli\u003eEngine has experienced overheating\u003c\/li\u003e\n\u003cli\u003eAnnual raw-water pump maintenance is due\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eInstallation Notes\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eShut off the raw-water supply before beginning work\u003c\/li\u003e\n\u003cli\u003eRemove the pump cover and extract the old impeller\u003c\/li\u003e\n\u003cli\u003eInspect the old impeller for missing vane pieces — locate all fragments in the cooling circuit before closing up\u003c\/li\u003e\n\u003cli\u003eInspect the cam, cover plate, and pump chamber for scoring or wear\u003c\/li\u003e\n\u003cli\u003eConfirm the pin-drive hub matches the pump shaft before installing the new impeller\u003c\/li\u003e\n\u003cli\u003eLubricate the new impeller with the supplied or approved water-safe impeller lubricant\u003c\/li\u003e\n\u003cli\u003eInstall the appropriate kit gasket for your pump model\u003c\/li\u003e\n\u003cli\u003eRotate the pump shaft in its normal operating direction while seating the impeller\u003c\/li\u003e\n\u003cli\u003eVerify strong cooling-water flow immediately after startup\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eRelated Parts\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"\/products\/8131455090724\"\u003eJohnson Pump 09-1027B-10 Impeller Kit (F5)\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/8131384213540\"\u003eJohnson Pump 09-812B-1 Impeller Kit (F6)\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/8131455123492\"\u003eJohnson Pump 09-1028BT-1 Impeller Kit (F7)\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/8131455287332\"\u003eJohnson Pump 09-808B-1 Impeller Kit\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/8131455254564\"\u003eJohnson Pump 09-806B-1 Impeller Kit\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/8131455221796\"\u003eJohnson Pump 09-801B Impeller\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/11110179864612\"\u003eJohnson Pump 09-45825 Service Kit for F6B-9\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/11110179799076\"\u003eJohnson Pump 09-45587 Service Kit\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/11110184550436\"\u003eSeachoice 17781 Impeller Puller\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/8131493265444\"\u003eVolvo Penta 3593573 Impeller Kit – Raw Water Pump\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/8131604774948\"\u003eJabsco Neoprene Impeller Kit 920-0001-P\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/8131601694756\"\u003eJabsco Neoprene Impeller Kit 11979-0001-P\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eParts Desk Insights\u003c\/h3\u003e\n\u003cp\u003eThe Johnson 09-1026B-1 is the standard service impeller for F4 and F4B raw-water pumps used on a wide range of European and Asian diesel engines — Volvo Penta, Westerbeke, Perkins, Yanmar, Bukh, and others. It is a common annual service item on sailboats and trawlers where these engines are frequently found. The Volvo Penta cross-references (804696, 875808, 897055, 3593659) make it easy to confirm fitment on Volvo-powered vessels without having a Johnson pump number on hand.\u003c\/p\u003e\n\u003cp\u003eThe most common ordering mistake is selecting by outside diameter alone. Several Johnson F4 impellers share the 2.00 in. \/ 50.8 mm diameter but have different bore sizes and drive styles — the bore difference between 09-1026B-1 (0.50 in.) and 09-808B-1 (0.47 in.) is small but critical for a proper shaft fit. As with all impeller services, check the old impeller carefully for missing vane pieces before closing up the pump — fragments in the cooling circuit are a frequent cause of continued overheating after an otherwise successful service.\u003c\/p\u003e","brand":"LNS","offers":[{"title":"Default Title","offer_id":51156139376676,"sku":"189-091026B1","price":68.29,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0743\/5799\/7604\/files\/5f1a8f87-7cdc-4380-b285-bf326f305c39.png?v=1788812407","url":"https:\/\/marisolmarine.com\/products\/johnson-pump-f4b-impeller-kit-09-1026b-1","provider":"Marisol Marine Company","version":"1.0","type":"link"}