What Octane do you buy?
What type of fuel are you using? We suggest to all of our customers to get the 91 octane since it is suppose to be free of ethanol that tends to do a lot of damage to older machines and tractors. Major issue is drawing water or moisture into the tanks. Second is the pitting it does on the inside of carburetors and the enamel type substance it leaves behind. The newer machines are ok and made to run off the lower octane levels.