Dave,
that's it, so how ancient is this motor? Locking down on the nut fixed the problem, thanks
Since this motor is so old is it worth playing around with? Kind of like our cars, by the way that is a nice car you got in your photo. I have a 1947 Dodge coupe, there is no way I would even want to drive this on a every day basis. So I have a slightly newer car for every day driving

maybe I should get a newer motor?
Philip