David Ridenour

I have twin 1984 120 Mercruisers in my boat. I need to change the oil,filters,points and plugs.I have a Chalmers manual but it doesn't list too many part numbers. Where can I find the part numbersI need? Any info appreciated.

Serial numbers are 6892106 and6892123. Thanks

Telum Pisces

I use this site for part numbers

http://www.mercruiserparts.com/Selec...asp?class_id=1

Here is the link for your engines:

http://www.mercruiserparts.com/selec...?doc_nbr=41261

<TABLE cellPadding=1 border=1><TBODY><TR><TD align=left bgColor=#ffffff>35-866340Q03</TD><TD align=left bgColor=#ffffff>OIL FILTER</TD></TR></TBODY></TABLE>

<TABLE cellPadding=1 border=1><TBODY><TR><TD align=right bgColor=#ffffff></TD><TD align=left bgColor=#ffffff>33-59571</TD><TD align=left bgColor=#ffffff>SPARK PLUG</TD></TR></TBODY></TABLE>

David Ridenour

Thanks!

FlounderAssassin

http://www.wholesalemarine.com/c/110...terndrive.html

bonita dan

Heres what ya do David. Go to your local Napa auto parts store,tell them what size,year,make etc. that you have. They all have a marine application catalog in the stores,if not they should. Get yourself some Champion plugs(GM ignition likes them),Napa oil &amp; filter,Standard ignition points but I suggest looking into upgrading in the future to electronic ignition(made a big differance in my engine) You'll save a lot of $ by using them and if ya have a buddy thats in the automotive business,try using his account name and pay cash for a discount. Any questions just holler and i'll see what I can do to help.

Champion plug: RBL8.....gap-.035"..........Ignition set w/cap:SME185268....point gap-.022"...Dwell-28-34 degrees....Ignition timing-8 degrees BTDC(before top dead center)

Cant find a listing for an oil or fuel filter(stupid internet!) There is usually a screen in the carbeurator and in most cases another filter in the bowl at the bottom of the fuel pump.If it has a strap on the pump bowl then theres a filter in there. Be careful when trying to take it off if its rusted! Order yourself a Seloc book for more in depth repairs or just keep asking questions and i'll just refer to mine for the time being.

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sosmarine

If you want to swap out that dist. I can probably get you one at a good price. Let me know.

truklodyte

Try looking up a GM 151 motor or 2.5 liter motoris the mercruiser 120mercury used two 4 cylinder motors. GM 151 and ford 4cylinder 470 motor is the mercruiser 170. here is picture of one



this should help with ID motor by looks.:usaflag

David Ridenour

A little late but thanks again guys!