I have Ariens snowblower w/ tecumseh 5hp H50-65077F. The engine starts fine @ idles OK but spudders , backfires through carb @ exhaust at any throttle. Carb has been cleaned & point, plug gap checked. Oh you only 75lbs of compression. Now what valves?

I have Ariens snowblower w/ tecumseh 5hp H50-65077F. the engine starts fine @ idles ok but spudders , backfires thru carb @ exhaust at any throttle. carb has been cleaned & point, plug gap checked. oh ya only 75lbs of compression. now what valves?
How long does an answer take?

Hello, is there anybody out there?

Yes, partslist, I would check the valves. Must have missed your question last Saturday.