{"product_id":"kohler-24-523-03-ech730-ech749-long-block","title":"Kohler 24 523 03 Long Block for Command PRO EFI ECH730–ECH749 Horizontal-Shaft Engines (747cc)","description":"\u003cp\u003eThe Kohler 24 523 03 is a genuine Kohler\/Rehlko long block for Command PRO EFI ECH730–ECH749 engines, the horizontal-crankshaft, electronic-fuel-injected 747cc models. A factory long block lets you rebuild a worn or damaged engine around a new core while reusing the components that are still serviceable on your current engine.\u003c\/p\u003e\u003cp\u003eKohler Engines is now Rehlko; the part number is unchanged.\u003c\/p\u003e\u003ch2\u003eKey features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eGenuine Kohler\/Rehlko service long block, part number 24 523 03\u003c\/li\u003e\n\u003cli\u003eBuilt for the Command PRO EFI ECH730–ECH749 horizontal-shaft family\u003c\/li\u003e\n\u003cli\u003eAluminum block with cast iron cylinder liners\u003c\/li\u003e\n\u003cli\u003eFull-pressure lubrication with full-flow oil filter\u003c\/li\u003e\n\u003cli\u003eNew factory part, made in the USA\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eFits\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eEngines\/Models:\u003c\/strong\u003e Kohler Command PRO EFI ECH730–ECH749 (horizontal shaft)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTypical equipment:\u003c\/strong\u003e commercial and industrial equipment powered by the ECH730\/ECH749 EFI engines\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHow to confirm:\u003c\/strong\u003e have your engine model, spec and serial number ready (on the engine's identification label). Kohler issues several long block numbers for this family and changes some parts mid-production, so we confirm the correct long block by spec before it ships.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eSpecifications\u003c\/h2\u003e\u003ctable class=\"tl-specs\"\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eBrand\u003c\/th\u003e\n\u003ctd\u003eRehlko (formerly Kohler Engines)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMPN\u003c\/th\u003e\n\u003ctd\u003e24 523 03\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eAlso listed as\u003c\/th\u003e\n\u003ctd\u003e2452303, 24-523-03\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eUPC\u003c\/th\u003e\n\u003ctd\u003e885612232977\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePart type\u003c\/th\u003e\n\u003ctd\u003eLong block\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eEngine family\u003c\/th\u003e\n\u003ctd\u003eCommand PRO EFI, ECH730–ECH749\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eCrankshaft\u003c\/th\u003e\n\u003ctd\u003eHorizontal\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eEngine type\u003c\/th\u003e\n\u003ctd\u003e4-cycle gasoline OHV, electronic fuel injection\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eDisplacement\u003c\/th\u003e\n\u003ctd\u003e747 cc (45 cu in)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eBore x stroke\u003c\/th\u003e\n\u003ctd\u003e83 x 69 mm (3.3 x 2.7 in)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eCompression ratio\u003c\/th\u003e\n\u003ctd\u003e9.1:1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eConstruction\u003c\/th\u003e\n\u003ctd\u003eAluminum block, cast iron cylinder liners\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eLubrication\u003c\/th\u003e\n\u003ctd\u003eFull pressure with full-flow filter\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eOil capacity (ECH730 engine)\u003c\/th\u003e\n\u003ctd\u003e1.9 L (2 US qt)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMax torque (ECH730 engine)\u003c\/th\u003e\n\u003ctd\u003e51.7 Nm (38.1 lb-ft) @ 2800 RPM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eCountry of origin\u003c\/th\u003e\n\u003ctd\u003eUSA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eShipping weight\u003c\/th\u003e\n\u003ctd\u003e60 lb (ships by freight)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\u003ch2\u003eFrequently asked questions\u003c\/h2\u003e\u003cdiv class=\"tl-faq\"\u003e\n\u003ch3\u003eWhich engines does the 24 523 03 long block fit?\u003c\/h3\u003e\n\u003cp\u003eIt is the long block for Kohler Command PRO EFI ECH730–ECH749 horizontal-shaft engines. Send us your model, spec and serial number and we will confirm it is the right number for your engine.\u003c\/p\u003e\n\u003c\/div\u003e\u003cdiv class=\"tl-faq\"\u003e\n\u003ch3\u003eIs there a vertical-shaft version?\u003c\/h3\u003e\n\u003cp\u003eYes. ECV730–ECV749 vertical-shaft engines use different long block numbers (for example 24 523 06, 07, 16 and 22). Don't swap a vertical long block onto a horizontal engine or the reverse.\u003c\/p\u003e\n\u003c\/div\u003e\u003cdiv class=\"tl-faq\"\u003e\n\u003ch3\u003eWhat is the displacement?\u003c\/h3\u003e\n\u003cp\u003e747 cc (45 cu in), with an 83 mm bore and 69 mm stroke.\u003c\/p\u003e\n\u003c\/div\u003e\u003cdiv class=\"tl-faq\"\u003e\n\u003ch3\u003eHow much oil does an ECH730 hold?\u003c\/h3\u003e\n\u003cp\u003eKohler's published spec for the ECH730 is 1.9 L (2 US qt). Always check the dipstick after filling.\u003c\/p\u003e\n\u003c\/div\u003e\u003cdiv class=\"tl-faq\"\u003e\n\u003ch3\u003eIs a long block a complete engine?\u003c\/h3\u003e\n\u003cp\u003eNo. A long block is the core engine assembly, not a ready-to-run engine. Contact us before ordering and we will confirm exactly which components are included and what to transfer from your old engine.\u003c\/p\u003e\n\u003c\/div\u003e\u003cdiv class=\"tl-faq\"\u003e\n\u003ch3\u003eIs Kohler the same as Rehlko?\u003c\/h3\u003e\n\u003cp\u003eYes. Kohler's engine business now operates as Rehlko, and genuine parts keep their Kohler part numbers.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Rehlko","offers":[{"title":"Default Title","offer_id":67787291099453,"sku":"GD-KOH24 523 03","price":1935.91,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0903\/8951\/2509\/files\/rfqqq-box-placeholder_bb1a61f0-9651-4e93-8ff8-64242e72d749.jpg?v=1793747525","url":"https:\/\/rfqqq.com\/products\/kohler-24-523-03-ech730-ech749-long-block","provider":"RFQQQ","version":"1.0","type":"link"}