Re: yahama year by ser# or mod#
front of owners manual or<br />pg 8 marine tune up specs or <br />model description,prop shaft horsepower,trim n tilt starting method,shaft liength,control method,model year,(special code only used on 25 hp 2 or 3 cylinder<br />b=03<br />a=02<br />z=01<br />y=00<br />x=99<br />exc exc thru the years. good luck