oh crap... I forgot... I did my maintenance!
If you really go through
5 tanks of fuel in less then a year, you may need a tune up!
Get an NGK spark plug, air filter, 2 fuel filters, and change the oil,
I'm guesing it's due!
BTW... use "Seafoam" Engine Treatment
ALL of the time, it keeps everything clean, and stabilizes the fuel in the winter!