Depends on what engine you have.
To adjust the valves on an Onan T260G engine, first, ensure the engine is cool and disconnect the spark plug wires for safety. Remove the valve cover to access the rocker arms and valves. Using a feeler gauge, check the clearance between the rocker arm and the valve stem, and adjust it by loosening the lock nut and turning the adjustment screw until the correct clearance is achieved. Finally, reassemble the valve cover and reconnect the spark plug wires.
Depends on the model of Onan. Some have an adjustment screw you turn in. Some adjust with a nut on a threaded shaft that pulls on a spring. Some have an electronic governor control. That you adjust with a small screw driver
As for as I know Onan never published that information. If it is a non Onan engine. You will have to check with the engine manufacturer.
One can find parts for an onan engine online. Some of the useful websites are Onan Parts, Discount Online Parts, Cummins Onan and Jacks Small Engines.
need a wiring diagram for a sears ss16 tractor with onan engine
Depends on what the equipment you have.
What is the reported manufacturers weight of the ONAN 250 HD GEN SET electrical generator?
Depends on the engine.
Onan no longer makes engines. But with the older ones it is hard to say. Both had very good engines. Some better than others. I would say Kohler had the better single cylinder engine after Onan stopped making the LK. Onan had better RV generator engines. On the larger units they were both the same in quality and support.
Should be 110 PSI
Depends on what fuel you are burning
That engine holds 1.75 quarts with filter change.