The speed was great when the motor was cool for about 1 minute most likely.............it wont work...................Cant believe you havent popped your speedo..........
You CAN fix it for $69.......................
Try a 9XL or 10XL........................it will work, maybe even an 8XL..........
http://www.offshoreelectrics.com/pro...-540XL&cat=116