Check the listing for details. 2PC 8M6002988 Fuel Rail Air/Regulator Diaphragm For Mercury Optimax 3.0L Engines. Condition: New other (see details). Listed at 228.00 USD. Brand OTNOTR Manufacturer Part Number 8M600298 Fuel Rail Air Warranty 2 Year Country/Region of Manufacture Taiwan 2PC 8M6002988 Fuel Rail Air/Regulator Diaphragm For Mercury Optimax 3.0L Engines Mercury Part #: 8M6002988 & 804533 8M6002988: This diaphragm fits both the air and fuel regulator on all of the Optimax 3.0L Model Engines (200 - 300 HP). Additionally, it is the same diaphragm used for the fuel diaphragm on the Optimax 2.5L Model Engines (135 - 175 HP). This diaphragm is used in either regulator (fuel or air) on the port side fuel rail for the 3.0L engines, and for the fuel regulator in the port side rail for the 2.5L engines. 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 Optimax Engine. This diaphragm is the flat top. 804533: The tracker diaphragm is identified by a short knob at the top of the part. The tracker diaphragm that is installed in the starboard fuel rail on either the 2.5L (135 - 175 HP) or 3.0L (200-300 HP) Optimax Engines. MYMYCopyright © 2023 DianxiaomiBrand OTNOTR Manufacturer Part Number 8M600298 Fuel Rail Air Warranty 2 Year Country/Region of Manufacture Taiwan 2PC 8M6002988 Fuel Rail Air/Regulator Diaphragm For Mercury Optimax 3.0L Engines Mercury Part #: 8M6002988 & 804533 8M6002988: This diaphragm fits both the air and fuel regulator on all of the Optimax 3.0L Model Engines (200 - 300 HP). Additionally, it is the same diaphragm used for the fuel diaphragm on the Optimax 2.5L Model Engines (135 - 175 HP). This diaphragm is used in either regulator (fuel or air) on the port side fuel rail for the 3.0L engines, and for the fuel regulator in the port side rail for the 2.5L engines. 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 Optimax Engine. This diaphragm is the flat top. 804533: The tracker diaphragm is identified by a short knob at the top of the part. The tracker diaphragm that is installed in the starboard fuel rail on either the 2.5L (135 - 175 HP) or 3.0L (200-300 HP) Optimax Engines. MYMYCopyright © 2023 Dianxiaomi