A bit from the manual for code 36- first item sounds like a possibility
14. All Gasoline Models
A. Vapor lock may occur in high ambient temperatures: operate in ambients at less than 120°F; verify
proper installation to prevent air recirculation; correct as necessary.
B. Measure steady DC voltage at fuel pump while genset is cranking: repair wiring as necessary.
C. Try to start genset on shop fuel supply: verify tank level and fuel line condition in vehicle.
15. All Gasoline Carburetor Models
A. Verify carburetor altitude setting: readjust as necessary.
B. Verify choke operation, setting, linkage, vacuum pull off assembly and sustain valve: readjust, repair
or replace as necessary.
C. Measure fuel pump pressure/flow: replace fuel filter or fuel pump as necessary.
D. Inspect carburetor butterfly for binding: replace carburetor as necessary.