Subaru Robin Power Products RG2800I - Manual (Page 58)

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Improper revolutions (Electronic throttle)
Engine starts but
stops suddenly.
Go to the start malfunction section
No
Yes
Yes
Does
not run
Engine revolution
does not increase.
Hunting
Confirm connection of
electronic throttle coupler.
Confirmed
Runs
Pull the recoil starter lightly with the full throttle open.
Full throttle direction Throttle direction is from the air cleaner in front
towards opposite direction (towards the back)
Dirty or bad spark plug
Poor return of the choke
Air cleaner blockage
Muffler blockage
Bad carburetor (water contamination, blockage, etc.)
Lack of gasoline
Gasoline deterioration
Blockage from the tank to the carburetor
Change the carburetor