I'm trying to rebuild the Tecumseh carb on an old 7 HP Yard Man snowblower and I need to match the model to a rebuild kit. I've found a model guide, but there are multiple numbers stamped. It's a non-adjustable carb with 27 stamped on the bowl, 42 stamped on one side of the body, and 525 stamped on the other.

Thanks!

A model # for the engine itself would help..
 
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Yes a model engine would further simply the identification but I did find this website. According to them, Tecumseh stamped part 525 coincides with the Carb# 631818. outdoorpowerinfo.com/engine_specs/tecumseh_carb_mfg_no.asp#google_vignette

Seems some parts are available, but not the entire kit:
 
https://www.jackssmallengines.com/jacks-parts-lookup/manufacturer/tecumseh/carburetor-parts/ca-631818-631818-ca/carburetor