COMPARE THE WAY YOUR INTAKE MANIFOLD SECURES TO THE CYLINDER. IF ITS SECURED BY A CLAMP, YOUR GOOD TO GO. IF IT IS SCREWD DOWN WITH SCREWS, THIS WILL NOT WORK. THIS WILL ALSO FIT A MS291 BUT THE CYLINDER DISPLACEMENT WILL BE SMALLER. THIS IS NOT USED ON ANY OTHER MODEL THAN STATED.
PLEASE NOTE THAT NEW SAWS ARE TEST RUN/BREAK-IN AT THE FACTORY SO THERE MAY BE OIL RESEDUE ON THE PART. ITEMS USUALLY ARRIVE QUICKLY, AS SHOWN BY MY FEEDBACK. THIS IS OUT OF MY CONTROL.