I have a utility 160 that I have been using and repair rebuilding ect. My grandfather cut the grass with it at home and at his jobs for over 40 years. It worked fine and now it is always blowing a head gasket. I have took the head off and placed it on a flat marble and polished it with 400g sandpaper to make it flat. it blows on on startup however runs and then will not run agin when turned off. Could this be the wrong spark plug as I don't have a cj8 in It and have a random bosh in it. should I use gasket sealer instead of a head gasket? Also, what is the best way to remove a head gasket as I find it hard not to scratch the head so I take off as much as I can and then use the sandpaper on marble to get rid of the the rest.
From Dean
