i have a older snapper 36'' walk behind the motor is blown what other motors can i use the motor that came with it is a kawasaki the shaft size is 1x3-5/31'' tapped 7/16 1/4'' key way the model number is w36120k i find briggs i/c motors all the time for cheap but im not sure if they will work im a welder/fab so i can make any motor fit but im not sure if the shaft will work or what pully i would need