Welcome to the site! I'll move your post to a new thread!I just bought a vintage model 8403 commercial. It looks very original has all decals, paint is very good. Show very little wear. I started to mow a bank and running along the side it would die. Like running out of fuel. Put it on flat ground and hit prime it fires right up. I'm thinking the float need adjusted. Any ideas. Sorry about the post not sure how this site works.
Usually bad compression will manifest itself as an inability to start or severe power loss, rather than hard starting. Sometimes the compression release on these engines fails, causing the motor to be really hard to crank, but that doesn't sound like your problem. Since it works good on starting fluid, I think the issue is somewhere in the fuel system. I'd pull it a couple times, without pulling enough to start it, and then look at the plug. If it's not wet, the problem is definitely in the fuel system.Yep, since I just removed the carb and re-built it, I was forced to remount it and all the linkage, correctly, I believe. It appears there is a little leaf like bar that operates the choke. You pull the choke out for 1st pull and it slowly recedes after pulling once or twice. Regardless if the engine actually runs.
I could only install the carb in a very particular way so there was no interferences and all was operating but cannot verify for SURE that leaf bar is in there correctly. No diagram available that I know of for model 10656.
Here is the deal: I have been holding off telling my suspicions, but since you have not offered a guess, I have to say: I think the rings are worn and the "problem" is low compression. Not enough energy stored in a cold compression to get her to go. I was hoping to get an objective, non-prejudiced opinion, but had to release. . . !