Snap, Crackle Pop

[Drjawtech]

Under load my RZT50 snaps and pops. If I stop it settles down. I have changed all fuel lines, cleaned carb, adjusted valves, changed spark plugs. Any help would be appreciated! I have a short video but can’t load it here.Mower pop

 

[ILENGINE]

Sounds like it is loading up on fuel. Is it blowing black smoke when that happens.

 

[Drjawtech]

Sounds like it is loading up on fuel. Is it blowing black smoke when that happens.

Thanks for responding. No, it does not blow any black smoke.