D7 17A Pony motor flooding.

I installed a rebuilt carb a few engine hours ago and enjoyed have the pony motor start right up. I run the carb dry to stop it every time. Came back this winter and it wanted to flood. Took the carb off and inspected the float valve operation. Float height was 1.185". Found some grit on the inlet side of the float seat and cleaned it. Installed steel needle valve and checked that it would drop out of the seat and follow the float movement. It didn't, so I replaced it with a new viton tipped needle and brass seat. It started and ran a few minutes but after shutting it off it still flooded just sitting there. Adjusted the float to lower the fuel level slightly. Flooding stopped while sitting but wouldn't start. Curious why
Also, the spark seems weak at the plugs.

Hi TOP,

seems you may have debris coming from the pony fuel tank, suggest you fit a in-line filter to stop the float being held open or sticking and so not opening. Reset float level to spec.

Suggest you check for points gap (0.015") and cleanliness of the magneto points, cap and rotor for carbon dust, spark plugs for correct gap, I usually run a few thou. less than spec. (0.024") around 0.020" for best results with old magnetos, saves stressing the old coils so much.

Cheers,

Eddie B.