Surging issue with 18.5hp OHV I/C platinum intek
So I replaced the motor on my craftsman ZTS 7500 almost two years ago and everything was peachy. I burned up PTO clutch and never got around to fixing it. Just used other mowers. Well I just drained old gas in the old girl and got it to fire to fully choked but stalls out if I open choke. Also while running choked it surges. I can see a throttle assembly bouncing so I’m not sure if it’s in need of an adjustment to stop the surging, or if it’s not getting good fuel (requiring a carb clean/rebuild) that is causing the surge? Any insight? I put new gas in but who knows what the float/bowl looks like. Thank you.
Btw I’m new here. My late father was the mower man and I’m just trying my best to follow in his footsteps.