you've got a large poulan saw like I do but I cant tell how big. The sears site gives only the parts numbers for your saw and no size info. I can tell you that its at least a 48cc or bigger. Thats the piont where all the larger saws had the crank built into the saw case and you have to cut it out on a band saw. Heck, you might have a 50cc-52cc, or even up into the 60's. hard to say. if you can guage the bore and stroke, that will tell you. Piper