Shelf life on gas without stabilizer is about 40 days.
I just went through the same issue with a 3hp Johnson. Gas had been in there for several years.
Removed the tank and washed it with water. Replaced all rubber fuel lines. Took carb apart and cleaned it out. Pay close attention to the jets. Mine was clogged solid and needed to get reamed. However if your motor already starts then you know you aren’t totally clogged. If the motor doesn’t run, give it a sniff of ether, if she fires and runs for a second on ether and then dies then you know your issue is fuel. If she don’t start with ether, your problem is somewhere else.
Posted Mon May 21, 2012 10:30 am