One thing we should have mentioned, is that it's vital to get any old fuel out of the tank, as far as possible, and refill with fresh stuff.

That long pickup tube shows signs of gum from old fuel around the screen, but a good rinse in fresh fuel should clean it up. If need be, it can be gently scrubbed with an old toothbrush.

I'd also replace the spark plug as routine here; NGK BM6A is my favoured type, or Champion CJ-8 is Briggs' OEM. Gap set to 0.030"/0.75mm.

Cheers,
Gadge

"ODK Mods can explain it to you, but they can't understand it for you..."

"Crazy can be medicated, ignorance can be educated - but there is no cure for stupid..."