Onan 2.8 generator starts when holding linkage open

[oldwo3]

Good evening fellow RVers.
2000 Dodge Roadtrek 190. 2.8 Onan gas generator, will not start unless I use a carb cleaner or hold the throttle linkage open when I crank the generator. Then it will start and run. Shut it down and it will not restart. I don't suspect fuel pump as it will start without any carb cleaner or such. But you better hold the linkage open and that appears to also close the choke.

Any recommendations will be appreciated.

Model number FA11574G, Serial Number K990019633.