Images
Details
OEM Part Number
Fuel Rail Diaphragms: 2PCS 8M6002988
Tracker Diaphragm: 1PCS 804533
Tool kit: 889431
Fit For the Following Models
8M6002988 – Air/Fuel Regulator Diaphragm
Type: Flat top diaphragm
Internal Structure: With steel balls inside
Application 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:
for Optimax 3.0L Models (200–300 HP)
for Optimax 2.5L Models (135–175 HP)
Notes:
Fits both air and fuel regulators on 3.0L engines
Fits fuel regulator only on 2.5L engines
804533 - Tracker Diaphragm
Design Feature: Short knob on top (tracker style)
Engine Compatibility:
for Optimax 2.5L Engines: 135–175 HP
for Optimax 3.0L Engines: 200–300 HP
Installation Location: Starboard fuel rail
Used as tracker diaphragm on both 2.5L and 3.0L engines
Identification: Easily identified by the short knob on the top of the diaphragm
This diaphragm kit restores proper fuel and air pressure regulation in Mercury Optimax engines, helping ensure smooth idle, reliable starting, and stable engine performance.
-Please leave us your full name, your telephone number and detailed address when ordering.
-We ship to your eBay order address. Please make sure your eBay order address is correct before you pay the order.
-We try our best to pack the products as good and safe as possible ,so they always arrive in a good condition.
-We accept PayPal only.
-All major credit cards are accepted through secure payment processor PayPal.
-Payment must be received within 4 business days of auction closing.
-We offer sophisticated products at a high technological level, with the highest possible quality and the most favorable price.
-With these parts you can replace your defective parts simply plug and play.
-Our warranty is valid for max. 24 months without mileage limitation.
-Please compare carefully with Photos or OE number before purchasing the part.
-Once a problem occurs with the purchased product, please do not hesitate to let us know with Ebay
Production Images
Production Details
OEM Part Number
Fuel Rail Diaphragms: 2PCS 8M6002988
Tracker Diaphragm: 1PCS 804533
Tool kit: 889431
Fit For the Following Models
8M6002988 – Air/Fuel Regulator Diaphragm
Type: Flat top diaphragm
Internal Structure: With steel balls inside
Application 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:
for Optimax 3.0L Models (200–300 HP)
for Optimax 2.5L Models (135–175 HP)
Notes:
Fits both air and fuel regulators on 3.0L engines
Fits fuel regulator only on 2.5L engines
804533 - Tracker Diaphragm
Design Feature: Short knob on top (tracker style)
Engine Compatibility:
for Optimax 2.5L Engines: 135–175 HP
for Optimax 3.0L Engines: 200–300 HP
Installation Location: Starboard fuel rail
Used as tracker diaphragm on both 2.5L and 3.0L engines
Identification: Easily identified by the short knob on the top of the diaphragm
This diaphragm kit restores proper fuel and air pressure regulation in Mercury Optimax engines, helping ensure smooth idle, reliable starting, and stable engine performance.
-Please leave us your full name, your telephone number and detailed address when ordering.
-We ship to your eBay order address. Please make sure your eBay order address is correct before you pay the order.
-We try our best to pack the products as good and safe as possible ,so they always arrive in a good condition.
-All major credit cards and online payments are accepted through secure payment processor ebay payment.
-Payment must be received within 4 business days of auction closing.
-We offer sophisticated products at a high technological level, with the highest possible quality and the most favorable price.
-With these parts you can replace your defective parts simply plug and play.
-Our warranty is valid for max. 24 months without mileage limitation.
-Please compare carefully with Photos or OE number before purchasing the part.
-Once a problem occurs with the purchased product, please do not hesitate to let us know with Ebay messages,we will offer you refund or replacement.
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On Feb 13, 2026 at 00:17:31 PST, seller added the following information: