Searching for new carb for Tecumseh

[Mr Mower Man]

Someone called me looking for a new carburetor for a 13HP Tecumseh vertical shaft engine, which is on a 38" Murray riding mower. He can't find any tags or numbers anywhere on the engine, and the only thing I was able to confirm is that it is an overhead valve engine.

Does any of you know a trick to finding out what the model number of the engine is so I can find the correct carburetor?

[KE4AVB]

The engine is then probably an OHV130; although, I won't know the spec number. If your customer still has his old carburetor there will be manufacture number on it that I may be able to cross. It should be 2 to 4 digit number.