What year is a sears outboard model number 225 581998?

Ok -- had the same question and found the answer -- 1996 would be the year and here is the link I found the answer on -- the second link is to find other model gamefisher outboards Mfg. date hope this helps others

http://www.discount-marine-parts.com/ob_gamefisher_1.html

http://www.discount-marine-parts.com/ob_gamefisher.html