Thank you for your question! To properly size a deck belt, remove the lawnmower deck to give yourself access to the mower deck belt and spindle pulleys. Locate each spindle pulley and number each one, starting at one and moving to the next closest, then the next closest and so on. Measure the distance between each pulley and total those up. The mower deck belt's circumference must be large enough to wrap entirely around all spindle pulleys at once. This particular blade will not fit your particular lawn mower model as it requires a belt that measures 88-inche in length by 1/2-inch width. The proper belt for your mower would be MaxPower part #336222. Thank you for your interest in MaxPower belts.
No, we would not recommend this particular belt for your use as it would not stretch 3 inches. To ensure a proper fit, please check your owner's manual to verify the proper replacement belt number and be sure that it matches one of the OEM numbers listed in our description. We make our best effort to ensure all replacement OEM numbers are detailed in our product description. Thank you!