Small Engines (Lawn Mowers, etc.): bradford rototillers, model number, 80s


Question
hello sir i have a bradford 28 inch and my son has removed the complete belt drive assmbly to use on his go-cart now i need a diagram to rebuild it any thoughts? model53493800 pb4 serial 6-241778

Answer
   I have looked around on the web quite a bit, and have plugged that model number into every brand parts lookup I have access to, and have come up with nothing, it must be very old.

I found one reference to it being a brand sold at Grants dept store,
which I remember went out of business in the 70s or 80s, another
intimated that it was manufactured by a company that was absorbered
by Murray, which went bankrupt itself.
    I hate not being able to come up with something to help you.
What brand of engine is on it?  With the numbers off of it, we might come up with a manufacture date.