PREPARE FOR WINTER: 10-50% discount on all OEM parts!

Unless prohibited by manufacturer. Does not include aftermarket or Crowley Marine branded products. Priced as marked.

Search Over 1 Million OEM Parts
Easy-to-use  parts diagrams Best price  guarantee Expert  live support 50+ years  of serving boaters Huge selection of OEM parts  -  from 1950 to 2026 Most parts in stock  -  Same day fulfillment
Most parts in stock- Same day fulfillment

Select your engine to find guaranteed-fit parts:

Mercury Marine

Diaphragm Assembly 804533

Satisfaction rating (6 Ratings)
$162.49 $190.99
You save $28.50 (15%)
In stock
  • This is an OEM part manufactured by Mercury Marine
  • 30 day return policy
Mercury Marine logo

Product Description

Keep your Mercury 110-330hp OptiMax outboard running strong with a genuine Mercury Diaphragm Assembly 804533. - Keep your Mercury 110-330hp OptiMax outboard running strong with a genuine Mercury Diaphragm Assembly 804533. - Fits Mercury 110-300hp DFI OptiMax TwoStroke outboards - Used within fuel rails of Mercury engines - Material tested for durability and longevity in tough marine environments - Mercury parts and accessories are backed by decades of experience in engineering, testing and manufacturing to provide the best fit, function and performance
Our verified social media accounts

Beware of impersonators

Customers Also purchased

Due to manufacturer policy OEM Mercury products can only be shipped to addresses within the United States.