i went and put new spark plugs in it before i started it up yesterday for the first time all summer. Ran good for the first 5 min then i shut it off to wash it and stuff. Turned it back on..took it around the yard and then every time i went to move it would just bogg down. had to have someone help me move it along as i pushed it. This happend at the end of last season but i thought it was just the plugs and the snow was gone so i said i wouldn't worry about it. It ran good all last season till the last week or so. Carbs were cleaned great last year. Any ideas what it could be, i thought maybe the choke was open too much and i should adjust it.