If you know anyone that is great with engines, please show them this video. My mower is doing exactly the same thing as this dudes. Exactly:
To date:
1. Tore down carb and cleaned. Looked clean, maybe minor gum in one jet, but don't think so.
2. Pulled magneto coils and checked. Showed 4 kohms resistance, on both connections on each coil. Since everything matched, I'm assuming coils are good.
3. Changed spark plugs. They were sparking. Both cylinders firing.
4. Checked rocker/stem clearance. Interestingly there was none. Reset to 4 mils. HOWEVER, the engine ran good for a year, and normally the rocker arm gets loose, not tighter, so I doubt this is it. Waiting for gasket, so can't retest.
The dude that shot the video bought a new $200 carb, and it fixed it. The theory on the internet is that there is a bad seal/o-ring/gasket, and it is sucking too much fuel from the bowl. So flooding out.
Any ideas? Fuel filter is new, and like I said the carb looked clean inside.
Engine: B&S 40777 02950 G5 22 HP v twin.