Some were flex, but only if you have the flex fuel motor, There will be a sticker under hood and gas door that say E85 approved.
The fuel pump is inside the gas tank you have to drop the tank to get it out
On a 2004 Mercury Mountaineer : The ELECTRIC fuel pump is INSIDE the gas tank
where is the fuel pump shutoff switch for a 1996 mercury mountaineer
On a 2002 Mercury Mountaineer : The electric fuel pump is INSIDE the fuel tank
For a Mercury Mountaineer : ( " regular " unleaded gasoline , 87 octane )
The 1999 Mercury Mountaineer owners manual shows : unleaded fuel only - 87 octane as the recommended fuel
On a 2001 Mercury Mountaineer : Underneath the Mountaineer , below the drivers door , mounted on the frame rail
On a 1997 Mercury Mountaineer : The ELECTRIC fuel pump is INSIDE the fuel tank ( it is installed through an access hole on the top of the fuel tank )
The engine is fuel injected so there is no carburetor on a 2000 Mercury Mountaineer
The first model year of the Mercury Mountaineer was 1997
On a 2002 Mercury Mountaineer : The ELECTRIC fuel pump is INSIDE the fuel tank . It is installed through an access hole on the top of the tank
The first model year of the Mercury Mountaineer SUV was 1997 The electric fuel pump is located inside the fuel tank