{"product_id":"impeller-kit-fits-westerbeke-generators-replaces-33112","title":"Impeller Kit – Fits Westerbeke Generators (Replaces 33112)","description":"\u003cstyle\u003e\n\/* Outer container allows horizontal scrolling (with iOS momentum) *\/\n.ss-table-wrap { overflow-x:auto; -webkit-overflow-scrolling:touch; }\n\/* Base table styles *\/\ntable.ss-table { width:100%; border-collapse:collapse; min-width:640px; }\ntable.ss-table th, table.ss-table td { padding:10px 12px; border:1px solid #e5e7eb; text-align:left; vertical-align:top; }\n\/* Key: prevent wrapping, word breaks, and vertical text in headers *\/\ntable.ss-table th { white-space:nowrap; word-break:normal; letter-spacing:normal; font-weight:600; background:#f8fafc; }\n\/* Small screen optimization *\/\n@media (max-width:480px){\n  table.ss-table th, table.ss-table td { padding:8px 10px; font-size:14px; }\n}\n\u003c\/style\u003e\n\u003csection\u003e\n  \u003ch2\u003eProduct Details\u003c\/h2\u003e\n  \u003cp\u003eThis \u003cstrong\u003eImpeller Kit – Fits Westerbeke Generators (Replaces 33112)\u003c\/strong\u003e is a direct replacement for various Westerbeke generator models from 6.5 kW to 20.0 kW, depending on the specific 60Hz or 50Hz configuration. It's designed to ensure reliable raw water flow for engine cooling.\u003c\/p\u003e\n  \u003cp\u003eThis kit serves as a direct interchange for several part numbers, including Sierra 23-3302, JMP 7110-01K, Sherwood 10077\/10077K, Onan 132-0375\/132-0379\/132-0498\/541-1519, Westerbeke 11764\/33100, Crusader 727103, and others.\u003c\/p\u003e\n  \u003cul\u003e\n    \u003cli\u003eEngineered for direct OEM replacement installation.\u003c\/li\u003e\n    \u003cli\u003eFeatures a durable neoprene impeller with a brass insert and key drive connection.\u003c\/li\u003e\n    \u003cli\u003eKit includes one impeller, three gaskets, and one O-ring for a comprehensive service.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/section\u003e\n\u003csection\u003e\n  \u003ch2\u003ePart Number Matrix\u003c\/h2\u003e\n  \u003cp\u003eUse this matrix to confirm equivalent references across OEM and aftermarket.\u003c\/p\u003e\n  \u003cdiv class=\"ss-table-wrap\"\u003e\n    \u003ctable class=\"ss-table\" aria-label=\"Part Number Matrix\"\u003e\n      \u003cthead\u003e\n        \u003ctr\u003e\n          \u003cth\u003eBrand\u003c\/th\u003e\n          \u003cth\u003ePart Number\u003c\/th\u003e\n        \u003c\/tr\u003e\n      \u003c\/thead\u003e\n      \u003ctbody\u003e\n        \u003ctr\u003e\n\u003ctd\u003eSierra\u003c\/td\u003e\n\u003ctd\u003e23-3302\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eSierra\u003c\/td\u003e\n\u003ctd\u003e23-2000\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eSierra\u003c\/td\u003e\n\u003ctd\u003e23-3310\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eJMP\u003c\/td\u003e\n\u003ctd\u003e7110-01K\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eSherwood\u003c\/td\u003e\n\u003ctd\u003e10077\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eSherwood\u003c\/td\u003e\n\u003ctd\u003e10077K\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eOnan\u003c\/td\u003e\n\u003ctd\u003e132-0375\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eOnan\u003c\/td\u003e\n\u003ctd\u003e132-0379\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eOnan\u003c\/td\u003e\n\u003ctd\u003e132-0498\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eOnan\u003c\/td\u003e\n\u003ctd\u003e541-1519\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eWesterbeke\u003c\/td\u003e\n\u003ctd\u003e11764\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eWesterbeke\u003c\/td\u003e\n\u003ctd\u003e33100\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eWesterbeke\u003c\/td\u003e\n\u003ctd\u003e33112\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eCrusader\u003c\/td\u003e\n\u003ctd\u003e727103\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eChris Craft\u003c\/td\u003e\n\u003ctd\u003e16.80-90047\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eUniversal\u003c\/td\u003e\n\u003ctd\u003e287439\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003c\/tbody\u003e\n    \u003c\/table\u003e\n  \u003c\/div\u003e\n\u003c\/section\u003e\n\u003csection\u003e\n  \u003ch2\u003eEngine \u0026amp; Model Compatibility\u003c\/h2\u003e\n  \u003cp\u003eConfirm your engine model\/year in the table below.\u003c\/p\u003e\n  \u003cp\u003eThis impeller kit is designed for a wide range of Westerbeke marine generators.\u003c\/p\u003e\n  \u003cdiv class=\"ss-table-wrap\"\u003e\n    \u003ctable class=\"ss-table\" aria-label=\"Engine \u0026amp; Model Compatibility\"\u003e\n      \u003cthead\u003e\n        \u003ctr\u003e\n          \u003cth\u003eBrand\u003c\/th\u003e\n          \u003cth\u003eModel\u003c\/th\u003e\n          \u003cth\u003eRated Output\u003c\/th\u003e\n          \u003cth\u003eFrequency\u003c\/th\u003e\n          \u003cth\u003eOEM Part No.\u003c\/th\u003e\n        \u003c\/tr\u003e\n      \u003c\/thead\u003e\n      \u003ctbody\u003e\n        \u003ctr\u003e\n\u003ctd\u003eWesterbeke\u003c\/td\u003e\n\u003ctd\u003e6.5 TWG\u003c\/td\u003e\n\u003ctd\u003e6.5 kW \/ 4.9 kW\u003c\/td\u003e\n\u003ctd\u003e60Hz \/ 50Hz\u003c\/td\u003e\n\u003ctd\u003e33112\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eWesterbeke\u003c\/td\u003e\n\u003ctd\u003e8.0 TWG\u003c\/td\u003e\n\u003ctd\u003e8.0 kW \/ 6.4 kW\u003c\/td\u003e\n\u003ctd\u003e60Hz \/ 50Hz\u003c\/td\u003e\n\u003ctd\u003e33112\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eWesterbeke\u003c\/td\u003e\n\u003ctd\u003e8.5 BTG\u003c\/td\u003e\n\u003ctd\u003e8.5 kW \/ 6.5 kW\u003c\/td\u003e\n\u003ctd\u003e60Hz \/ 50Hz\u003c\/td\u003e\n\u003ctd\u003e33112\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eWesterbeke\u003c\/td\u003e\n\u003ctd\u003e8.5 BTGA\u003c\/td\u003e\n\u003ctd\u003e8.5 kW \/ 6.8 kW\u003c\/td\u003e\n\u003ctd\u003e60Hz \/ 50Hz\u003c\/td\u003e\n\u003ctd\u003e33112\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eWesterbeke\u003c\/td\u003e\n\u003ctd\u003e11.0 TWG\u003c\/td\u003e\n\u003ctd\u003e11.0 kW \/ 8.5 kW\u003c\/td\u003e\n\u003ctd\u003e60Hz \/ 50Hz\u003c\/td\u003e\n\u003ctd\u003e33112\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eWesterbeke\u003c\/td\u003e\n\u003ctd\u003e12.5 BTG\u003c\/td\u003e\n\u003ctd\u003e12.5 kW \/ 10.0 kW\u003c\/td\u003e\n\u003ctd\u003e60Hz \/ 50Hz\u003c\/td\u003e\n\u003ctd\u003e33112\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eWesterbeke\u003c\/td\u003e\n\u003ctd\u003e15.0 BTG\/A\u003c\/td\u003e\n\u003ctd\u003e15.0 kW \/ 12.0 kW\u003c\/td\u003e\n\u003ctd\u003e60Hz \/ 50Hz\u003c\/td\u003e\n\u003ctd\u003e33112\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eWesterbeke\u003c\/td\u003e\n\u003ctd\u003e20.0 WTA\u003c\/td\u003e\n\u003ctd\u003e20.0 kW \/ 16.0 kW\u003c\/td\u003e\n\u003ctd\u003e60Hz \/ 50Hz\u003c\/td\u003e\n\u003ctd\u003e33112\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003c\/tbody\u003e\n    \u003c\/table\u003e\n  \u003c\/div\u003e\n\u003c\/section\u003e\n\u003csection\u003e\n  \u003ch2\u003eTechnical Specs\u003c\/h2\u003e\n  \u003cdl\u003e\n    \u003cdt\u003eProduct Type\u003c\/dt\u003e\n\u003cdd\u003eMarine Generator Impeller Kit\u003c\/dd\u003e\n    \u003cdt\u003eInstallation\u003c\/dt\u003e\n\u003cdd\u003eDirect OEM replacement\u003c\/dd\u003e\n    \u003cdt\u003eConnection\u003c\/dt\u003e\n\u003cdd\u003eKey Drive\u003c\/dd\u003e\n    \u003cdt\u003eHousing Material\u003c\/dt\u003e\n\u003cdd\u003eNeoprene (impeller) with Brass insert\u003c\/dd\u003e\n    \u003cdt\u003eHousing Color\u003c\/dt\u003e\n\u003cdd\u003eBlack\u003c\/dd\u003e\n    \u003cdt\u003eDimensions\u003c\/dt\u003e\n\u003cdd\u003e57mm diameter × 20mm width (impeller)\u003c\/dd\u003e\n    \u003cdt\u003eWeight\u003c\/dt\u003e\n\u003cdd\u003e0.14 kg (0.30 lbs) approx. (impeller only)\u003c\/dd\u003e\n    \u003cdt\u003eFitting Type\u003c\/dt\u003e\n\u003cdd\u003eKey Drive Impeller\u003c\/dd\u003e\n    \u003cdt\u003eWarranty\u003c\/dt\u003e\n\u003cdd\u003e1 year manufacturer warranty (JMP); Sierra lifetime warranty on materials and workmanship\u003c\/dd\u003e\n    \u003cdt\u003eOther Technical Attributes\u003c\/dt\u003e\n\u003cdd\u003e12 impeller blades; 12.7mm (1\/2\") shaft diameter\u003c\/dd\u003e\n  \u003c\/dl\u003e\n\u003c\/section\u003e\n\u003csection\u003e\n  \u003ch2\u003eWhat’s in the Box\u003c\/h2\u003e\n  \u003cul\u003e\n    \u003cli\u003e1 x Impeller (replaces Westerbeke 33112)\u003c\/li\u003e\n    \u003cli\u003e1 x Gasket (GAK0041)\u003c\/li\u003e\n    \u003cli\u003e1 x Gasket (GAK0042)\u003c\/li\u003e\n    \u003cli\u003e1 x Gasket (GAK0043)\u003c\/li\u003e\n    \u003cli\u003e1 x O-Ring (ORG0040)\u003c\/li\u003e\n  \u003c\/ul\u003e\n  \u003cp\u003e\u003csmall\u003e\u003cem\u003eNote: Some applications may not require all items included in the kit.\u003c\/em\u003e\u003c\/small\u003e\u003c\/p\u003e\n\u003c\/section\u003e\n\u003csection\u003e\n  \u003ch2\u003eInstallation Notes\u003c\/h2\u003e\n  \u003col\u003e\n    \u003cli\u003eClose the raw water intake seacock before starting work.\u003c\/li\u003e\n    \u003cli\u003eAccess the seawater pump assembly on your generator.\u003c\/li\u003e\n    \u003cli\u003eRemove the pump's faceplate screws and cover to expose the old impeller.\u003c\/li\u003e\n    \u003cli\u003eCarefully remove the old impeller using suitable pliers or an impeller puller. Note the direction the blades are bent.\u003c\/li\u003e\n    \u003cli\u003eClean the inside of the pump housing and the faceplate, removing any old gasket material or debris.\u003c\/li\u003e\n    \u003cli\u003eInstall the correct new gasket for your pump model.\u003c\/li\u003e\n    \u003cli\u003eLightly lubricate the inside of the pump housing and the new impeller with a water-based lubricant or glycerine.\u003c\/li\u003e\n    \u003cli\u003eInsert the new impeller with a twisting motion, ensuring the blades bend in the same direction as the old one.\u003c\/li\u003e\n    \u003cli\u003eReinstall the faceplate and tighten the screws evenly in a star pattern.\u003c\/li\u003e\n    \u003cli\u003eOpen the raw water seacock.\u003c\/li\u003e\n    \u003cli\u003eStart the generator and immediately check for proper water flow and for any leaks around the pump cover.\u003c\/li\u003e\n  \u003c\/ol\u003e\n\u003c\/section\u003e\n\u003csection\u003e\n  \u003ch2\u003eTroubleshooting \u0026amp; FAQ\u003c\/h2\u003e\n  \u003cdetails\u003e\u003csummary\u003eHow do I know if this impeller fits my generator?\u003c\/summary\u003e\u003cp\u003eFirst, check the \"Engine \u0026amp; Model Compatibility\" table on this page. If your Westerbeke generator model is listed, this kit is a confirmed fit. You can also verify by cross-referencing your existing part number with those in our \"Part Number Matrix.\"\u003c\/p\u003e\u003c\/details\u003e\n  \u003cdetails\u003e\u003csummary\u003eWhat are the signs of a failing impeller?\u003c\/summary\u003e\u003cp\u003eCommon symptoms include the generator running hotter than normal, a \"low raw water flow\" alarm, or a noticeably reduced stream of water from the exhaust. Visible signs on the old impeller include cracked, brittle, or missing blades.\u003c\/p\u003e\u003c\/details\u003e\n  \u003cdetails\u003e\u003csummary\u003eHow often should I replace my generator's impeller?\u003c\/summary\u003e\u003cp\u003eAs a general rule, impellers should be inspected annually and replaced at least every one to two years, or sooner depending on hours of use and water conditions (e.g., sandy or silty water). Refer to your generator's service manual for specific maintenance intervals.\u003c\/p\u003e\u003c\/details\u003e\n  \u003cdetails\u003e\u003csummary\u003eWhy are there multiple gaskets and an O-ring in this kit?\u003c\/summary\u003e\u003cp\u003eThis kit is designed to service multiple generator and pump configurations. Different models use slightly different gaskets or O-rings for sealing the pump cover. Match the new gasket to your old one to ensure a proper seal; you will have parts left over.\u003c\/p\u003e\u003c\/details\u003e\n  \u003cdetails\u003e\u003csummary\u003eCan I install this myself?\u003c\/summary\u003e\u003cp\u003eYes, replacing a raw water pump impeller is a common maintenance task for many boat owners with basic mechanical skills and tools. However, if you are unsure about the process, professional installation is recommended to prevent leaks or pump damage.\u003c\/p\u003e\u003c\/details\u003e\n  \u003cdetails\u003e\u003csummary\u003eWhat happens if I install the impeller with the blades bent the wrong way?\u003c\/summary\u003e\u003cp\u003eThe pump will likely self-correct the blade direction upon the first startup. However, for best practice and to reduce initial stress on the blades, it is always recommended to pre-bend them in the direction of the pump's rotation during installation.\u003c\/p\u003e\u003c\/details\u003e\n  \u003cdetails\u003e\u003csummary\u003eOEM vs. Aftermarket?\u003c\/summary\u003e\u003cp\u003eThis listing is an aftermarket replacement (not OEM). Built to OEM-level specifications with comparable materials. Manufactured in an ISO 9002 facility, batch-inspected for consistency.\u003c\/p\u003e\u003c\/details\u003e\n  \u003cdetails\u003e\u003csummary\u003eShipping speed \u0026amp; cost\u003c\/summary\u003e\u003cp\u003eWe ship worldwide quickly—typical transit 5–15 days. Standard shipping is free; expedited options appear at checkout where available.\u003c\/p\u003e\u003c\/details\u003e\n  \u003cdetails\u003e\u003csummary\u003eWarranty \u0026amp; returns\u003c\/summary\u003e\u003cp\u003eCovered by a 1-year warranty against manufacturing defects under normal use. If issues arise, contact support with your order details. Returns are accepted within our standard window (unused \u0026amp; in original condition). See our policy page or reach out for instructions.\u003c\/p\u003e\u003c\/details\u003e\n\u003c\/section\u003e\n\u003csection\u003e\n  \u003ch2\u003eSafety \u0026amp; Important Info\u003c\/h2\u003e\n  \u003cul\u003e\n    \u003cli\u003eVerify images\/specifications vs your original part. If anything differs—even if your model appears compatible—do not purchase.\u003c\/li\u003e\n    \u003cli\u003eThis is an aftermarket replacement, not an OEM component.\u003c\/li\u003e\n    \u003cli\u003eProfessional installation is recommended for safety and performance.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/section\u003e\n\u003csection\u003e\n  \u003ch2\u003eAbout Sea Sierra\u003c\/h2\u003e\n  \u003cul\u003e\n    \u003cli\u003e\n\u003cstrong\u003ePro-Grade Standards\u003c\/strong\u003e — We supply marine parts engineered to OEM-level tolerances and tested for real-world conditions.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eFast Global Fulfillment\u003c\/strong\u003e — Free standard delivery to most regions in 5–15 days.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eManufacturer-Direct Value\u003c\/strong\u003e — Fair pricing without compromising on materials or QC.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/section\u003e","brand":"SeaSierra","offers":[{"title":"Default Title","offer_id":50717905715515,"sku":"23FIK592R","price":35.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0826\/8673\/8747\/files\/23FIK592R.png?v=1762938059","url":"https:\/\/seasierra.com\/products\/impeller-kit-fits-westerbeke-generators-replaces-33112","provider":"SeaSierra","version":"1.0","type":"link"}