Replaces the following part numbers:
 
91-889431      
Replaces the following models:
 200-300HP(3.0L) 135-175HP(2.5L)
This listing is for the Mercury 2.5L or 3.0L Optimax engine fuel rail with the installation tool.
 

We recommend if you do not have a Mercury Dealer doing the job that you purchase the Mercury Diaphragm Installation Tool (Mercury Part #: 804533).

Please contact us with any questions, or to verify correct parts.