This might belong in the walk behind section, but it's not even a tractor so here it is. I picked up this Atlas 18" snowblower today.It has a 4HP Briggs engine. Everything appears to be in good shape with very little wear showing. The gas tank that bolted to the bottom of the carb is missing , but I think I have one tucked away. If not I will "borrow" the one off of my Merry tiller. The spring in the recoil needs to be replaced.After a quick cleaning of the points it has good strong ,blue spark at the plug. I cannot find the info to date the engine by the serial number. The number is 6806187. Can anyone tell me the year it was made? Thanks.