Hi again,
With my multimeter, the output of generator is between 208 and 212 volts. To my knowledge, it is a bit lower than specs, which says in Finland, that generator output should be close to 220 volts (+/- 2 %).
I have to check the nut and the adjustment like advised me in earlier post. I'll do that earliest in January, when I visit my cottage and try to find out, wheather it is the reason or not. I try to remember report results here, because I have got very good advice from many guys here in forum. Really nice to belong to such a great group.
Thanks and we'll be hearing later, how things go :-)