Hello I have An Argo vanguard with a briggs and Stratton 16hp vanguard motor That doesn't like to idle otherwise appears to run ok except for the brain fart that caused it to blow a head gasket 100% my fault. Back to my problem, I am new at working on Argo's but I have worked on snowmobiles and noticed that the drive belt an a sled doesn't turn at idle but does turn on my argo is this normal and if not coulld it cause it not to idle properly.