Mercruiser 5.7 Questions

fg2matt

Cadet
Joined
Sep 10, 2012
Messages
26
I'm going to be doing some maintenance to my motor which is an '89 260hp 5.7 Mercruiser with Alpha One gen 1 outdrive.

Basically what I need to know is what oil should i be running and what oil filter, and what spark plugs are needed.

I'm really struggling to find much info on these older motors. I tried a search but saw many different opinions.

Any help would be greatly appreciated (I am trying to stick with OEM specs on oil weight, etc.)

Thanks, Matt
 
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