Have 97 Briggs Vanguard from a White tractor, 20hp. Has a two barrel carb on it, Starts only with choke, cold or warm. Revs up, high speed seems fine, yet halfway throttled it pulses and spits and sputs out exhauste quite a bit. Have run carb cleaer direct into throat and also sea-foam drippd in and it is also in gas. When I spray cleaner in it smooths out real nice for a moment. New gas line filter. Pulled line offf pump to carb and ran. Doesn't squirt real hard, but does deliver. Should it be a strong stream or just kinda heavy pulse? Seems like running only one cylinder. Pulled plug wire and no diff. Pulled plug and hooked up and lots of sparking there. SO, guessing one side not getting fuel. Plug was wet and black. Or at least black. Went out for drive and tractor in high range bogs a lot, doesn't pull strong. Tried the pto for deck and it won't turn mower. The mower blades turn by hand and the gear box seemed to turn when I used screwdriver to turn the shaft. Engine just bogs, no matter how slow I feed the pto lever in. Not sure if some issues are just one cylinder not running or ???
Looking at carb,I see no float bowl area. it curve to go into intake and opposite side curves up to go into the air cleaner. There IS gaskets between parts,, maybe just diaphragms?? I would like to get a kit and rebuild. My engine manual shows nothing on carb, not even brand specs. Numbers stamped on top are 1DBS-009 and a triangle with letters I can't read, but might be KDC in middle. Any idea of brand with these numbers? And where to go for info?