{"product_id":"804533-mercury-mercruiser-diaphragm-assembly-genuine-quicksilver-oem-part","title":"804533 Mercury MerCruiser Diaphragm Assembly | Genuine Quicksilver OEM Part","description":"\u003cp\u003e\n 🔧 Product Description\n\u003c\/p\u003e\n\u003cp\u003e\n \u003cbr\u003e\n\u003c\/p\u003e\n\u003cp\u003e\n Genuine Quicksilver Diaphragm Assembly - Part Number: 804533\n\u003c\/p\u003e\n\u003cp\u003e\n \u003cbr\u003e\n\u003c\/p\u003e\n\u003cp\u003e\n Genuine Quicksilver\/Mercury diaphragm assembly for Mercury OptiMax DFI two-stroke outboard fuel rail applications. This OEM diaphragm is used in compatible fuel rail assemblies and helps maintain correct fuel and air pressure regulation for reliable direct fuel injection performance.\n\u003c\/p\u003e\n\u003cp\u003e\n \u003cbr\u003e\n\u003c\/p\u003e\n\u003cp\u003e\n ⚙️ Key Features\n\u003c\/p\u003e\n\u003cp\u003e\n \u003cbr\u003e\n\u003c\/p\u003e\n\u003cp\u003e\n • Genuine Quicksilver\/Mercury OEM diaphragm assembly\n\u003c\/p\u003e\n\u003cp\u003e\n • Designed for Mercury OptiMax DFI two-stroke outboards\n\u003c\/p\u003e\n\u003cp\u003e\n • Used in compatible fuel rail \/ tracker diaphragm applications\n\u003c\/p\u003e\n\u003cp\u003e\n • Helps maintain correct fuel rail pressure control\n\u003c\/p\u003e\n\u003cp\u003e\n • Critical fuel-system service component for DFI engine performance\n\u003c\/p\u003e\n\u003cp\u003e\n \u003cbr\u003e\n\u003c\/p\u003e\n\u003cp\u003e\n 🔄 Supersession \u0026amp; Cross Reference\n\u003c\/p\u003e\n\u003cp\u003e\n \u003cbr\u003e\n\u003c\/p\u003e\n\u003cp\u003e\n OEM Supersession Chain:\n\u003c\/p\u003e\n\u003cp\u003e\n \u003cbr\u003e\n\u003c\/p\u003e\n\u003cp\u003e\n • 804533\n\u003c\/p\u003e\n\u003cp\u003e\n \u003cbr\u003e\n\u003c\/p\u003e\n\u003cp\u003e\n OEM \/ Related Numbers:\n\u003c\/p\u003e\n\u003cp\u003e\n \u003cbr\u003e\n\u003c\/p\u003e\n\u003cp\u003e\n • 804533\n\u003c\/p\u003e\n\u003cp\u003e\n • 804533 diaphragm assembly\n\u003c\/p\u003e\n\u003cp\u003e\n • Tracker diaphragm fuel rail reference\n\u003c\/p\u003e\n\u003cp\u003e\n • Starboard fuel rail diaphragm application\n\u003c\/p\u003e\n\u003cp\u003e\n • 804533T related service reference where listed\n\u003c\/p\u003e\n\u003cp\u003e\n \u003cbr\u003e\n\u003c\/p\u003e\n\u003cp\u003e\n Aftermarket \/ Verified Equivalents:\n\u003c\/p\u003e\n\u003cp\u003e\n \u003cbr\u003e\n\u003c\/p\u003e\n\u003cp\u003e\n • Aftermarket tracker diaphragm equivalents available for matched OptiMax fuel rail applications\n\u003c\/p\u003e\n\u003cp\u003e\n • REC: related OptiMax diaphragm replacement references where matched by application\n\u003c\/p\u003e\n\u003cp\u003e\n \u003cbr\u003e\n\u003c\/p\u003e\n\u003cp\u003e\n 🚤 Compatibility\n\u003c\/p\u003e\n\u003cp\u003e\n \u003cbr\u003e\n\u003c\/p\u003e\n\u003cp\u003e\n Commonly used on:\n\u003c\/p\u003e\n\u003cp\u003e\n \u003cbr\u003e\n\u003c\/p\u003e\n\u003cp\u003e\n • Mercury OptiMax DFI two-stroke outboard fuel rail assemblies\n\u003c\/p\u003e\n\u003cp\u003e\n • Mercury 2.5L and 3.0L OptiMax fuel pressure control systems\n\u003c\/p\u003e\n\u003cp\u003e\n \u003cbr\u003e\n\u003c\/p\u003e\n\u003cp\u003e\n Typically suits:\n\u003c\/p\u003e\n\u003cp\u003e\n \u003cbr\u003e\n\u003c\/p\u003e\n\u003cp\u003e\n • Engine models:\n\u003c\/p\u003e\n\u003cp\u003e\n • Mercury 110HP OptiMax DFI two-stroke outboards\n\u003c\/p\u003e\n\u003cp\u003e\n • Mercury 115HP OptiMax DFI two-stroke outboards\n\u003c\/p\u003e\n\u003cp\u003e\n • Mercury 135HP OptiMax 2.5L DFI two-stroke outboards\n\u003c\/p\u003e\n\u003cp\u003e\n • Mercury 150HP OptiMax 2.5L DFI two-stroke outboards\n\u003c\/p\u003e\n\u003cp\u003e\n • Mercury 175HP OptiMax 2.5L DFI two-stroke outboards\n\u003c\/p\u003e\n\u003cp\u003e\n • Mercury 200HP OptiMax 3.0L DFI two-stroke outboards\n\u003c\/p\u003e\n\u003cp\u003e\n • Mercury 225HP OptiMax 3.0L DFI two-stroke outboards\n\u003c\/p\u003e\n\u003cp\u003e\n • Mercury 250HP OptiMax 3.0L DFI two-stroke outboards\n\u003c\/p\u003e\n\u003cp\u003e\n • Mercury 300HP OptiMax 3.0L DFI two-stroke outboards\n\u003c\/p\u003e\n\u003cp\u003e\n • Mercury 330HP OptiMax DFI two-stroke outboard applications where 804533 diaphragm is specified\n\u003c\/p\u003e\n\u003cp\u003e\n • Starboard fuel rail tracker diaphragm applications on Mercury 2.5L 135HP-175HP OptiMax engines\n\u003c\/p\u003e\n\u003cp\u003e\n • Starboard fuel rail tracker diaphragm applications on Mercury 3.0L 200HP-300HP OptiMax engines\n\u003c\/p\u003e\n\u003cp\u003e\n \u003cbr\u003e\n\u003c\/p\u003e\n\u003cp\u003e\n • HP Range: 110HP - 330HP\n\u003c\/p\u003e\n\u003cp\u003e\n • Engine Type: Mercury OptiMax DFI two-stroke outboard fuel rail \/ pressure control system\n\u003c\/p\u003e\n\u003cp\u003e\n • Year Range: Application dependent by OptiMax model, fuel rail design and serial number\n\u003c\/p\u003e\n\u003cp\u003e\n \u003cbr\u003e\n\u003c\/p\u003e\n\u003cp\u003e\n 🔌 Function\n\u003c\/p\u003e\n\u003cp\u003e\n \u003cbr\u003e\n\u003c\/p\u003e\n\u003cp\u003e\n The diaphragm assembly helps regulate pressure inside the OptiMax fuel rail system. Correct diaphragm operation is essential for stable fuel delivery, air\/fuel pressure balance, idle quality and direct-injection performance.\n\u003c\/p\u003e\n\u003cp\u003e\n \u003cbr\u003e\n\u003c\/p\u003e\n\u003cp\u003e\n Common signs of failure:\n\u003c\/p\u003e\n\u003cp\u003e\n \u003cbr\u003e\n\u003c\/p\u003e\n\u003cp\u003e\n • Hard starting\n\u003c\/p\u003e\n\u003cp\u003e\n • Rough idle or misfire\n\u003c\/p\u003e\n\u003cp\u003e\n • Poor acceleration\n\u003c\/p\u003e\n\u003cp\u003e\n • Fuel pressure instability\n\u003c\/p\u003e\n\u003cp\u003e\n • Engine running rich or lean\n\u003c\/p\u003e\n\u003cp\u003e\n • Fuel smell or leakage around fuel rail\n\u003c\/p\u003e\n\u003cp\u003e\n • Diagnostic faults related to fuel or air pressure regulation\n\u003c\/p\u003e\n\u003cp\u003e\n \u003cbr\u003e\n\u003c\/p\u003e\n\u003cp\u003e\n 📦 Condition\n\u003c\/p\u003e\n\u003cp\u003e\n \u003cbr\u003e\n\u003c\/p\u003e\n\u003cp\u003e\n • Genuine Quicksilver part\n\u003c\/p\u003e\n\u003cp\u003e\n • Brand new\n\u003c\/p\u003e\n\u003cp\u003e\n • Supplied in original or equivalent packaging\n\u003c\/p\u003e\n","brand":"Quicksilver","offers":[{"title":"Default Title","offer_id":53388121309476,"sku":"8883991","price":136.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0994\/8115\/7924\/files\/original_6dd46c98-0c29-4817-a7fd-ee0a4eef2b58.jpg?v=1777211298","url":"https:\/\/www.sawleysautoandmarine.com.au\/products\/804533-mercury-mercruiser-diaphragm-assembly-genuine-quicksilver-oem-part","provider":"Sawley's Auto and Marine","version":"1.0","type":"link"}