Mercury 2002-2005 EFI Oil Injection - How Reliable and Can it Be Removed

[aalbert]

I have two new to me 150 EFIs (the later throttle body motors), a 2002 and a 2005. Is there a way to disable the oil injection, and use premix (assume it would require tricking the sensors), and is it worth going through the effort to do so?

[Steve Pope]

Leave it on. The ecu controled oil injection is very reliable. It also has a good warning system and the engine gaurdian protection.

[aalbert]

Thanks, that is what reading the manual was kinda pushing me towards (based on Guardian), but am glad to hear that the ECU controlled oil injection is robust.