Mercruiser 3.0L Alternator Belt Size

[kwagner]

Greetings!
I'm looking to confirm the alternator belt that should be used for my boat engine.
Engine: 1988 Mercruiser 3.0L 4 cyl Alpha I (Ser#: 0C312542)

I was told that the Merc part # is 57-64032Q1. Can anyone confirm? (there is no number on the existing belt)

Thanks guys!

 

[Don S]

Re: Mercruiser 3.0L Alternator Belt Size

That is the right belt number for that year engine, the SN is for the outdrive, not the engine, but that shouldn't matter. Same belt for 87-89. Without Power Steering.

 

[kwagner]

Re: Mercruiser 3.0L Alternator Belt Size

thanks Don! There was another number i found - 0C303829

 

[Don S]

Re: Mercruiser 3.0L Alternator Belt Size

That's probably the transom shield or another drive, hard to say. But it's not engine.