Yes the rings stick from ( carbon build up) continued slow running and idleing a lot.....Thats why you should add one ounce of Ring Free for every 10 gallons of gas you put in. This is what I do and I also try to run the snot out of it when I get though fishing before I put it on the trailer. Since I have been doing this I have had no problem and no more gas in the crank case.