I just replaced one of those. The first aftermarket one didn't tighten down properly and the belt didn't line up. The complete end of it broke off after 5 mins of running. That was fun. OEM one worked. Cust supplied the AM one.
While you are in there remove the idlers and pop a seal off and oil...
They are both 14 cubic inch briggs. Some were recoil and some starter generator. The yellow one is more complete but is recoil start. The green one has the starter generator. I will probably wind up removing both engines and use the best of each to make a good electric start one