Small Engines (Lawn Mowers, etc.): Carb jetting

Question
I have a Tecumseh hm80 I want to putt a air filter on . The carb isn't jetted for one. What would be correct Jett #.

Answer
Have you considered using an adjustable high speed jet?

Did you check with you local small engine dealer and see if the adjustable jet from the Tecumseh 631839 jet will screw (fit) into your carburetor?

What is the engine spec number?  I need the spec number to see exactly which carb you have.

Eric