hello everyone, i am new to the site and i have read old post for hours. my problem is i have a 98 40 hp mariner that a friend is giving me and it does not have a lower unit on it. it has tilt and trim controls with it. i cannot find the model number on it and the tag with the serial number is very hard to read. the serial number best i can read is 06801473. i would like to be able to find a lower unit for it used so to keep my cost down. can anyone tell me if there is a range of year models that will fit this unit. thanks for any info and help.