{"product_id":"jlm-marine-fuel-pump-for-johnson-evinrude-20-30-hp-model-0438555-28-spline-direct-fit","title":"JLM MARINE Fuel Pump for Johnson \u0026 Evinrude 20-30 HP — Model 0438555, 28-Spline Direct-Fit","description":"\u003cstrong\u003eJLM MARINE 0438555 is a direct-fit replacement fuel pump built to restore reliable fuel delivery on Johnson and Evinrude 20HP, 25HP, and 30HP outboard engines.\u003c\/strong\u003e\n\n\u003cp\u003eIf your older Johnson or Evinrude outboard is sputtering, hard to start, or losing power under load, a worn or failed fuel pump is a common cause. This JLM MARINE 438555 pump (also referenced as 0438555) is manufactured to match the original equipment fitment for many 1990–2000-era engines and replaces multiple legacy part numbers so you can get back on the water without guessing which component you need.\u003c\/p\u003e\n\n\u003ch3\u003eWill this pump fit my Johnson or Evinrude outboard?\u003c\/h3\u003e\n\u003cp\u003eCompatibility covers a defined set of two-stroke outboards in the 20–30 horsepower range and aligns with the OEM mounting and splined shaft dimensions. Confirming model year and engine serial numbers before purchase prevents mismatches.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eFits Johnson\/Evinrude 20HP, 25HP, and 30HP outboards\u003c\/li\u003e\n  \u003cli\u003eDesigned for engines manufactured roughly between 1990 and 2000\u003c\/li\u003e\n  \u003cli\u003eDirect replacement for part numbers: Johnson\/Evinrude 438555, 433386, 777764\u003c\/li\u003e\n  \u003cli\u003eInterchangeable with Sierra 18-7353 and Mallory 9-35353\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow does this pump improve engine performance?\u003c\/h3\u003e\n\u003cp\u003eBy restoring steady fuel pressure and consistent flow, the pump helps eliminate misfires, loss of acceleration, and rough idling caused by fuel delivery problems. It's engineered to reproduce the factory flow characteristics so carburetion and ignition timing remain stable under load.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eDelivers consistent fuel supply to carburetors\u003c\/li\u003e\n  \u003cli\u003eHelps reduce hard-start and stalling issues\u003c\/li\u003e\n  \u003cli\u003eMaintains proper engine response under throttle changes\u003c\/li\u003e\n  \u003cli\u003eEngineered to match original flow spec for correct tuning\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat should I know about installation and fitment details?\u003c\/h3\u003e\n\u003cp\u003eThe pump features the common 28-spline drive used on the specified outboards, so installation is typically straightforward for anyone familiar with small engine maintenance. Basic hand tools and a short block-down service window are usually all that's required, but inspect gaskets and fuel lines while you service the unit.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e28-spline shaft designed to match OEM drives\u003c\/li\u003e\n  \u003cli\u003eDirect bolt-on replacement—no modification expected\u003c\/li\u003e\n  \u003cli\u003eReplace mounting gasket and check fuel hose condition during install\u003c\/li\u003e\n  \u003cli\u003eSuitable for routine DIY or professional marine mechanic replacement\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow durable and reliable is the JLM MARINE 0438555 pump?\u003c\/h3\u003e\n\u003cp\u003eThis replacement is built to meet the demands of marine use, with materials and tolerances chosen to resist corrosion and wear typical in outboard fuel systems. While it restores original functionality, lifespan depends on fuel quality, maintenance, and operating conditions.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eConstructed to withstand marine fuel system conditions\u003c\/li\u003e\n  \u003cli\u003eReplaces multiple legacy part numbers for proven compatibility\u003c\/li\u003e\n  \u003cli\u003ePerformance relies on clean fuel and correct installation\u003c\/li\u003e\n  \u003cli\u003eRegular inspection of pump and fuel lines extends service life\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for: Boat owners and technicians who operate Johnson or Evinrude 20–30 HP outboards from the 1990s era and need a reliable, direct replacement fuel pump. It’s especially useful for restoring performance on older two-stroke outboards, performing scheduled maintenance, or addressing fuel-delivery faults without modifying the engine.\u003c\/p\u003e\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Which engines specifically use the 0438555 fuel pump?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: It fits Johnson and Evinrude 20HP, 25HP, and 30HP outboards, mainly models produced around 1990–2000; verify serial\/model before ordering.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Does this pump require modification to install?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: No modification is typically needed; it’s a direct-fit 28-spline replacement, but replace the gasket and check fuel lines during installation.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"JLM MARINE","offers":[{"title":"Default Title","offer_id":48085611511966,"sku":"B0CT54W4SQ","price":37.98,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0781\/2041\/9486\/files\/jlm-marine-0438555-front-view.jpg?v=1785874240","url":"https:\/\/northtrailauto.ca\/products\/jlm-marine-fuel-pump-for-johnson-evinrude-20-30-hp-model-0438555-28-spline-direct-fit","provider":"North Trail Auto","version":"1.0","type":"link"}