2005 Suzuki that ran fine. Sat in the sun for about 3 weeks. Now won’t start without starting fluid and pulsates severely after starting. Fuel system was completely redone about 4 months ago. Fuel filter is fine. Any suggestions? thanks
Starting fluid = evil.. don’t use it unless absolutely necessary. Have you tried squirting plain gas (or pre-mix) into the intake, to see if that will make it fire? Does it have reliable spark?
If spark is solid, then as beerman57 suggests, look for water in the carb, or other issues such as blocked jets.