Thanks both. Will check these things, especially points. The engine after a few mintutes running is tip top, runs ticks over and responds well to the throttle, nice and tight, governor works well to regulate varying loads.
Also seems quite economical, as used only half a tank of fuel for a days logging pulling loaded trailer up a long and in places steep hill. engine breaking also quite good on decent.
Just this niggle that no choke is needed, which is a bit odd. I will look at the points, and if we have any trouble with it will lap valves this winter. Thanks again.