My 70's era Onan is a bit prone to small stumbling etc from time to time. Replaced:
Gas line and filter
After our little trip this week which included some very wash boarded roads it began to show classic fuel starvation symptoms.
I checked the fuel to the unit...Good.
Adjusted the choke so it would run and it needed almost closed to run smooth/at all, indicating to me a vac leak or a jet issue.
At this point I figured our very stuttery ride had dislodged/stirred up something in the float bowl. The gen had set for quite a while before I bought it so who knows what evils were in the bowl.
TECRON......Hasn't failed me yet.
Right now it's purring in the driveway with the 110v water heater and a 5k AC running.
1/2 bottle, 10gal. gas.