Jim H.,
You should look over your engine when you can to see just what you have going on. I had a K301 that smoked like a fog machine. It was a nightmare inside. On the other hand I have had two K241 that smoked, one really bad. The one only needed de-carbonized and a valve adjustment. Of course truing up the head did not hurt either. The other got the same treatment with a new piston, rod and rings. They are both running strong and smooth. What I'm trying to say is that it might not be all that bad inside and you won't know till you look. And based on what I have seen with my tractors I think an inspection is very worth while.
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