Mercury outboard 60 motor turning over but not firing up.

Hey George ,
You should be able to find out what you need here:
Mercury Mariner 50 60 HP 3 Cylinder Engine Components

Mercury Outboard Manuals by Seloc 1965 2014

It's a 25XD from 1986

I see it as a 6M from 1986 in the mercury listings...

I usually do cars and trucks, but if you are getting an electronic beep, you might go online and refer to an engine Manual for what you own. You may have a low oil lockout for the crankcase on a 4 cycle or a low oil cutoff alert for a 2 cycle with an automatic oil feed mixer. Some transition of inboard-outboard technology to outboards can include tilt lockout so that you can not start up in gear. Most prevent the starter from turning, but could keep the engine from firing if they want to wire it that way. With the "beeps" it would seem to be a Code.

Need some more info to answer your question. Will the motor not turn over at all or will it turn over and just not crank up?

You have some luck looking around the Mercury section of the boating forums.

http://forums.iboats.com/mercury-mariner-outboards-25/

You should be able to find an answer on www.iboats.com boating forums.
https://www.google.com/search?q=fuel+oil+ration++mercury+outboard+site%3Aforums.iboats.com&aq=f&oq=fuel+oil+ration++mercury+outboard+site%3Aforums.iboats.com&aqs=chrome.0.64.10562j0&sourceid=chrome&ie=UTF-8