Rob, Have some faith in the three of us + your "one shop", Your engine serial number (OD988694) is a 1996 MERCURY TMC NA 5 MH, Model number 1005201SK.Thanks for the replies - I am still confused (!) as the Marineshoppen site gives the serial range: " 5 (Japan) 1-cyl 0D987474 0T999999" for all years from 1996 to 2004. Is there any way of distinguishing the particular year? The only other number on the sticker is "394" .
The Maxrules site does not go past 1996, and gives the same serial range for both 4hp & 5hp motors!
Probably should have mentioned that I am in Australia so that might also have some bearing on the year/serial mix.
Thanks again for the suggestions.
Rob