{"product_id":"impros-hooker-yamaha-4sj-144mm-impeller","title":"Impros Hooker Yamaha 4SJ 144mm Impeller","description":"\u003cp\u003e\u003cspan\u003eThe Impros Hooker 144mm impeller for the 4-stroke Yamaha SuperJet. The impeller is 144mm outer diameter, 75mm hub size. Ditch you 2021+ SuperJets \u003cem\u003ehorrible \u003c\/em\u003estock impeller that creates so much cavitation. You'll be amazed at the performance gain with this impeller upgrade.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eIncludes \u003c\/span\u003e\u003cspan\u003erubber nose seal. \u003cstrong\u003eHighly recommend adding an impeller tool (WR001) as well, for ease of installation.\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003eThe pitches available are 9\/15, 10\/16 and 11\/17. These numbers are much different from other impeller pitches you have heard of. While they are very low, the root angle, blade length and other geometric differences set the Hooker apart from the others. \u003cspan\u003e The 11\/17 pitch is suggested for stock skis, and if you have a tune, we suggest the 10\/16 pitch. Offered as a low pitched 9\/15 for certain tunes, and for higher elevation riding. \u003cstrong\u003eTHIS IS NOT A STOCKED PART, 2-3 DAY ARRIVAL TO HSI ONCE YOU ORDER.\u003c\/strong\u003e\u003cspan style=\"color: rgb(255, 42, 0);\"\u003e \u003c\/span\u003e\u003c\/span\u003e\u003cspan style=\"color: rgb(255, 42, 0);\"\u003e\u003cem\u003eIf you need a custom pitch for your application, we can special order it - depending on time of year ETA will be 2-4 weeks.\u003c\/em\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe hooker impeller is a 3-blade large hub diameter, radial edge design stainless steel impeller designed to improve the overall performance of your ski. Material is a 17-4 stainless steel cast with recreation polish. Will fit into many aftermarket pumps like Solas, Freedom, etc, \u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eDescription of LEADING vs TRAILING edge pitch: \u003c\/strong\u003eThe leading edge is the blade that is first in contact with the water entering the pump tunnel before it gets pushed through the pump. This is your right-off-throttle \"bottom end\" hit. The trailing edge is what will carry you through the power band and allow the engine to get the full amount of power to the water.\u003cem\u003e People often don't realize it, but impeller tuning is the ultimate way to get power to the water.\u003c\/em\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003ePart Number: IMY4SJ144-9\/15, IMY4SJ144-10\/16, IMY4SJ144-11\/17\u003c\/p\u003e","brand":"Impros","offers":[{"title":"9\/15","offer_id":48413083599003,"sku":"30-IMY4SJ144-9\/15","price":399.95,"currency_code":"USD","in_stock":false},{"title":"10\/16","offer_id":48413083631771,"sku":"30-IMY4SJ144-10\/16","price":399.95,"currency_code":"USD","in_stock":false},{"title":"11\/17","offer_id":48413083664539,"sku":"30-IMY4SJ144-11\/17","price":399.95,"currency_code":"USD","in_stock":false},{"title":"Custom Pitch (special order)","offer_id":48413083697307,"sku":"30-IMY4SJ144-CUSTOM","price":474.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0318\/7507\/2133\/files\/ImprosImpellerKawi_4SJ_3.png?v=1782677473","url":"https:\/\/highspeedind.com\/da\/products\/impros-hooker-yamaha-4sj-144mm-impeller","provider":"High Speed Industries","version":"1.0","type":"link"}