Fuel Rail Diaphragms & Tool Kit Replacement for Mercury 2.5L 3.0L Engines 804533 8M6002988 889431

OE Part Numbers:Fuel Rail Diaphragms: 2PCS 8M6002988Tracker Diaphragm: 1PCS 804533Tool kit: 889431Fits For the Following:8M6002988 – Air/Fuel Regulator DiaphragmType: Flat top diaphragmInternal Structure: With steel balls insideApplication Position:Fuel or air regulator on port side fuel rail (3.0L engines)Fuel regulator on port side fuel rail (2.5L engines)Compatible Engines:Replacement for Optimax 3.0L Models (200–300 HP)Replacement for Optimax 2.5L Models (135–175 HP)Notes:Fits both air and fuel regulators on 3.0L enginesFits fuel regulator only on 2.5L engines804533 - Tracker DiaphragmDesign Feature: Short knob on top (tracker style)Engine Compatibility:Replacement for Optimax 2.5L Engines: 135–175 HPReplacement for Optimax 3.0L Engines: 200–300 HPInstallation Location: Starboard fuel railUsed as tracker diaphragm on both 2.5L and 3.0L enginesIdentification: Easily identified by the short knob on the top of the diaphragmThis diaphragm kit serves as a replacement for Mercury Optimax engines, restoring proper fuel and air pressure regulation to ensure smooth idle, reliable starting, and stable engine performance.

• Fuel Rail Diaphragms 8M6002988 + Tracker Diaphragm 804533 + Tool Kit 889431
• OE Part Numbers: 8M6002988, 804533, 889431
• 8M6002988: This diaphragm is used in either the fuel or air regulator on the port side fuel rail for 3.0L engines, and in the fuel regulator on the port side rail for 2.5L engines.
• 8M6002988: The Air/Fuel diaphragm for sale is not the tracker diaphragm that is installed in the starboard fuel rail on either the 2.5L or 3.0L Engine, This diaphragm is the flat top.
• 804533: The tracker diaphragm is identified by a short knob at its top and is installed in the starboard fuel rail of either the 2.5L (135–175 HP) or 3.0L (200–300 HP) engines.