If you post several pictures, with and without engine cover from several different angles, maybe someone can help you out.
You might also call BRP, maybe they can cross reference the serial number for you.
What we need to do is start a new topic. Whatever age the OP's motor is, it's a year older now because the question went unresolved over a year ago. agfonz, Please read the notice on top of this page about hijacking a topic.