Identifying a Merc

[Greg Z]

I would like to know everything I can about this motor . It is a 2003 225L Opti Max RPM 5750 499 Lbs . Is it a 3.0L ? Is it EFI ? I think it is a stock lower unit 1 :75 but how do I tell there is no markings on it . Vin # OT790992. Thanks ><>

[rchavis]

Best to list a serial number of the motor which should be on the clamp bracket .
If it a Optimax it is a DFI motor and not a EFI motor and most Optimax are 3.0 L , but they made some 225 , 2.5 L also .

[Savage]

Buy a Genuine Mercury Marine Service Manual according to the motors Serial Number.......Everything you need to know will be in that manual.

[Greg Z]

Buy a Genuine Mercury Marine Service Manual according to the motors Serial Number.......Everything you need to know will be in that manual.

I have thought about that . Why do that when I have you guys and BBC
I continue to appreciate all your help and after all this is social media. ><>

[Savage]

If you SERVICE your own motor, then you will still need the SERVICE MANUAL.....

[Greg Z]

If you SERVICE your own motor, then you will still need the SERVICE MANUAL.....

Thanks Sav. I have got my hands on a manual and been reading. That's doesn't mean I am not going to still rely on your experience Thanks

[Greg Z]

Ran the vin it is a 3.0 L

[mdtritn21]

It's a 225 opti max so it's a 3.0L. You can find those old mercury opti max manuals on ebay right reasonable $65.00

[JOE54]

Thanks Sav. I have got my hands on a manual and been reading. That's doesn't mean I am not going to still rely on your experience Thanks

can I get a amen anybody