re: Push Mower problem: need help

When it starts, are you choking it extra? Sounds like it’s not getting enough gas. Possible the lines are clogged, your Carb float needs adjusted to allow more gas, or that your throttle needs adjusted.

Eta: re read about running with filter off sorry. Usually that means the air/ fuel mixture is off. If it’s the filter, it’s getting too much gas for the filter mix. If it’s too much gas the filter removed adds more oxygen.

So it’s likely getting too much gas, the float needs adjusted to reduce the gas or throttle adjusted to run better with current mixture.